JP5805495B2 - Image display device, image display system, and program - Google Patents

Description

  The present invention relates to a technique for displaying a plurality of data plotted along a time series on a graph with dots, and in particular, expands or contracts the time scale of the graph according to the graph display magnification set by the user. The present invention relates to a technique for improving inconvenience.

  Conventionally, an electronic medical chart system is known. For example, Patent Document 1 discloses an electronic medical record system that constructs an electronic medical record by efficiently inputting medical information in consideration of the relationship between medical practices. This electronic medical chart system constitutes electronic medical chart information by medical practice information including medical practice and related information and application time information of this medical practice information. Also, the medical practice information of the electronic medical record information is displayed as browsing information on the time axis. Further, the medical practice information in the electronic medical record information being edited is displayed on the time axis. Then, in response to a user operation, the medical practice information in the electronic medical record is edited.

  12 and 13 are diagrams showing screen display examples of the electronic medical chart system. As shown in FIG. 12, this electronic medical chart system has a multi-stage time axis (for example, year unit, month unit, day unit) at the top. In addition, a medical practice (object) is displayed below. In this electronic medical record system, items on the left are medical practices (disease name, medication, diagnosis, examination, etc.), and the actual practices are recorded on the right side with a certain time width.

  As shown in FIG. 13, the user can view the information on an arbitrary scale by selecting the upper time axis, and can jump to an arbitrary time. By picking up arbitrary items and viewing them on an optimal time scale, it is possible to estimate the causal relationship of medical information, which is time-series data that looks random at first glance. By performing the scale conversion by finger operation (for example, pinch-in / out), the scale can be switched more intuitively.

  In this way, the user can display a multi-stage scale, pick up an arbitrary item, and perform an operation such as pinching in / out with a finger to view the scale on an optimal time scale. This makes it possible to estimate the causal relationship of medical information, which is time-series data that looks random at first glance, while intuitively operating.

Japanese Patent Laid-Open No. 2008-192002

  However, for these data, the number of data is extremely large. For example, in the case of a diabetic patient, medication and examination are performed every day, and these have 356 data on an annual scale. There are hundreds of these types of medications and tests. For this reason, the number of data objects representing these data generally swells from thousands to tens of thousands. In a system composed of a server and a client, it takes a lot of time for data transmission and drawing to display these data, and the user response falls.

  On the other hand, as shown in FIG. 13, by expanding the time scale, the interval between plot points is narrowed, and a plurality of data can be seen integrated. As a result, the integrated data is not all necessary data, and it is sufficient to extract at least one data. Therefore, it is possible to thin out data according to the magnification to be integrated, the data amount is reduced by the thinned amount, and the processing speed can be improved. In such a case, it is possible to draw and transmit a graph at a high speed by determining a magnification for transmitting the graph in advance and preparing data necessary for drawing the graph at that magnification. .

  FIG. 14 is a diagram defining the relationship between the time scale and the magnification. By holding only data necessary for drawing a graph as a database table at a magnification corresponding to transmission numbers 1 to 20 shown in FIG. 14, unnecessary data search is not required, and graph creation time can be shortened.

  However, in the conventional method, in order to create this database table, for each transmission number, it is necessary to calculate a data plot that becomes invisible from the interval of each data plot, and to create a data table. There was a problem that it took a lot of time.

  The present invention has been made in view of such circumstances, and an image display device and an image display capable of quickly creating a data table and improving the data transmission speed while suppressing a decrease in visibility. The object is to provide a system and program.

  (1) In order to achieve the above object, the present invention takes the following measures. That is, the image display device of the present invention is an image display device that displays a plurality of data plotted in time series on a graph with dots, and according to the display magnification of the graph set by the user, Scale change unit that expands or reduces the time scale of the graph, shows the relationship between the number of hours that represent one dot and the number of visible data, and identifies the point where the slope sharply decreases in the graph corresponding to the data type Dividing a larger magnification than the minimum integrated magnification obtained by multiplying the steep slope identifying unit, the number of dots corresponding to the identified point and the number of dots per unit time into a plurality of sections, and corresponding to each of the sections An averaging processing unit that averages a plurality of data integrated at a scaling factor, a database table that holds the averaged data for each category, and a user Therefore data corresponding to the set display magnification of the graph extracted from the database table, characterized in that it comprises a screen control unit to be displayed on the screen as a graph, a.

  In this way, the relationship between the number of hours for expressing one dot and the number of visible data is shown, and in the graph corresponding to the data type, the point at which the gradient sharply decreases is identified, and the number of dots corresponding to the identified point The magnification larger than the minimum integrated magnification obtained by multiplying the number of dots per unit time is divided into multiple sections, and multiple data integrated at the magnification corresponding to each section are averaged and averaged Since each data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (2) Further, the image display device of the present invention is an image display device that displays a plurality of data plotted in time series on a graph with dots, and has a display magnification of the graph set by a user. In response, the scale changing unit for expanding or reducing the time scale of the graph, and the number of dots per unit time based on the time scale are set to the minimum number of dots in the interval between adjacent data on the graph. The minimum integration magnification obtained by multiplication, and the maximum integration magnification obtained by multiplying the number of dots of the maximum interval among the intervals of adjacent data on the graph by the number of dots per unit time based on the time scale In accordance with the above, the magnification from the minimum integration magnification to the maximum integration magnification is divided into a plurality of categories, and a plurality of data integrated at a magnification corresponding to each of the categories is divided. An average processing unit that averages data, a database table that holds the averaged data for each of the categories, and data corresponding to the display magnification of the graph set by a user is extracted from the database table And a screen control unit that graphs and displays on a screen.

  In this way, the minimum integration magnification obtained by multiplying the number of dots at the minimum interval among the intervals between adjacent data on the graph by the number of dots per unit time based on the time scale, and the data adjacent on the graph According to the maximum integration magnification obtained by multiplying the number of dots in the interval of the maximum interval by the number of dots per unit time based on the time scale, the magnification from the minimum integration magnification to the maximum integration magnification is divided into multiple categories. Since a plurality of data integrated at a magnification corresponding to each section is averaged and each averaged data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (3) Further, in the image display device of the present invention, the database table holds the number of the averaged data and sequentially uses each data included in the section corresponding to the minimum integration magnification. It is characterized by holding the contained data.

  In this way, the number of averaged data is retained, and the data included in each section is retained sequentially using the data included in the section corresponding to the minimum integration magnification, thus improving the creation speed of the database to be used. Can be made.

  (4) Further, the image display system of the present invention includes a client device and a server device, and on the screen of the client device, an image that displays a plurality of data plotted in time series on a graph with dots. In the display system, the server device shows a relationship between the number of hours representing one dot and the number of visible data, identifies a point where the gradient sharply decreases in the graph corresponding to the data type, and A plurality of data that is divided into a plurality of divisions with a magnification larger than the minimum integration magnification obtained by multiplying the number of dots corresponding to the selected point by the number of dots per unit time, and integrated at a magnification corresponding to each division And the averaged data is stored in a database table for each category, and the client device is set by the user. Acquires data corresponding to the display magnification of the graph from a database table of the server device, and displaying on the screen as a graph.

  In this way, the relationship between the number of hours for expressing one dot and the number of visible data is shown, and in the graph corresponding to the data type, the point at which the gradient sharply decreases is identified, and the number of dots corresponding to the identified point The magnification larger than the minimum integrated magnification obtained by multiplying the number of dots per unit time is divided into multiple sections, and multiple data integrated at the magnification corresponding to each section are averaged and averaged Since each data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (5) Moreover, the image display system of this invention is comprised from the client apparatus and the server apparatus, and on the screen which the said client apparatus has, the image which displays the some data plotted along the time series on the graph with a dot In the display system, the server device obtains the minimum integration obtained by multiplying the minimum number of dots in the interval between adjacent data on the graph by the number of dots per unit time based on the time scale. From the minimum integration magnification, according to the magnification and the maximum integration magnification obtained by multiplying the number of dots of the maximum interval among the adjacent data intervals on the graph by the number of dots per unit time based on the time scale. Dividing the magnification up to the maximum integration magnification into a plurality of divisions, and a plurality of data integrated at a magnification corresponding to each division The averaged data is stored in the database table for each of the categories, and the client device acquires data corresponding to the display magnification of the graph set by the user from the database table of the server device. The graph is displayed on a screen.

  In this way, the minimum integration magnification obtained by multiplying the number of dots at the minimum interval among the intervals between adjacent data on the graph by the number of dots per unit time based on the time scale, and the data adjacent on the graph According to the maximum integration magnification obtained by multiplying the number of dots in the interval of the maximum interval by the number of dots per unit time based on the time scale, the magnification from the minimum integration magnification to the maximum integration magnification is divided into multiple categories. Since a plurality of data integrated at a magnification corresponding to each section is averaged and each averaged data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (6) Moreover, the image display system of this invention is comprised from the client apparatus and the server apparatus, and on the screen which the said client apparatus has, the image which displays the some data plotted along the time series on the graph with a dot In the display system, the server device shows a relationship between the number of hours representing one dot and the number of visible data, identifies a point where the gradient sharply decreases in the graph corresponding to the data type, and A plurality of data that is divided into a plurality of divisions with a magnification larger than the minimum integration magnification obtained by multiplying the number of dots corresponding to the selected point by the number of dots per unit time, and integrated at a magnification corresponding to each division And the averaged data is stored in a database table for each of the categories, and the user passes the client device through the client device. The data corresponding to the determined display magnification of the graph is acquired from the database table and graphed, and the client device acquires the graphed data from the server device and displays it on the screen. Features.

  In this way, the relationship between the number of hours for expressing one dot and the number of visible data is shown, and in the graph corresponding to the data type, the point at which the gradient sharply decreases is identified, and the number of dots corresponding to the identified point The magnification larger than the minimum integrated magnification obtained by multiplying the number of dots per unit time is divided into multiple sections, and multiple data integrated at the magnification corresponding to each section are averaged and averaged Since each data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (7) Further, the image display system of the present invention is configured of a client device and a server device, and on the screen of the client device, an image displaying a plurality of data plotted in time series on a graph in dots. In the display system, the server device obtains the minimum integration obtained by multiplying the minimum number of dots in the interval between adjacent data on the graph by the number of dots per unit time based on the time scale. From the minimum integration magnification, according to the magnification and the maximum integration magnification obtained by multiplying the number of dots of the maximum interval among the adjacent data intervals on the graph by the number of dots per unit time based on the time scale. Dividing the magnification up to the maximum integration magnification into a plurality of divisions, and a plurality of data integrated at a magnification corresponding to each division Averaging, holding each averaged data in the database table for each section, obtaining data corresponding to the display magnification of the graph set by the user via the client device from the database table, The client device acquires the graphed data from the server device and displays the data on a screen.

  In this way, the minimum integration magnification obtained by multiplying the number of dots at the minimum interval among the intervals between adjacent data on the graph by the number of dots per unit time based on the time scale, and the data adjacent on the graph According to the maximum integration magnification obtained by multiplying the number of dots in the interval of the maximum interval by the number of dots per unit time based on the time scale, the magnification from the minimum integration magnification to the maximum integration magnification is divided into multiple categories. Since a plurality of data integrated at a magnification corresponding to each section is averaged and each averaged data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (8) Further, the program of the present invention is a program for an image display device that displays a plurality of data plotted in time series on a graph with dots, and the display magnification of the graph set by the user. Accordingly, the process of enlarging or reducing the time scale of the graph, and the relationship between the number of hours that represent one dot and the number of visible data are shown, and the point that the gradient rapidly decreases in the graph corresponding to the data type A magnification larger than the minimum integrated magnification obtained by multiplying the processing to be identified and the number of dots corresponding to the identified point by the number of dots per unit time is divided into a plurality of categories, and the magnification corresponding to each category A process for averaging a plurality of data integrated in the process, a process for holding each averaged data in a database table for each section, and a user A process for causing a computer to execute a series of processes of extracting data corresponding to a predetermined display magnification of the graph from the database table and processing of extracting the extracted data into a graph and displaying the data on a screen. And

  In this way, the relationship between the number of hours for expressing one dot and the number of visible data is shown, and in the graph corresponding to the data type, the point at which the gradient sharply decreases is identified, and the number of dots corresponding to the identified point The magnification larger than the minimum integrated magnification obtained by multiplying the number of dots per unit time is divided into multiple sections, and multiple data integrated at the magnification corresponding to each section are averaged and averaged Since each data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  (9) Further, the program of the present invention is a program for an image display device that displays a plurality of data plotted in time series on a graph with dots, and the display magnification of the graph set by the user. Accordingly, the process of enlarging or reducing the time scale of the graph, and multiplying the number of dots of the smallest interval among the adjacent data intervals on the graph by the number of dots per unit time based on the time scale. According to the minimum integration magnification obtained by multiplying the number of dots of the maximum interval among the intervals of adjacent data on the graph by the number of dots per unit time based on the time scale, The magnification from the minimum integration magnification to the maximum integration magnification is divided into a plurality of divisions, and a plurality of data integrated at a magnification corresponding to each division is obtained. Processing for averaging data, processing for holding each averaged data in the database table for each section, and processing for extracting data corresponding to the display magnification of the graph set by the user from the database table And a process of graphing the extracted data and displaying the extracted data on a screen.

  In this way, the minimum integration magnification obtained by multiplying the number of dots at the minimum interval among the intervals between adjacent data on the graph by the number of dots per unit time based on the time scale, and the data adjacent on the graph According to the maximum integration magnification obtained by multiplying the number of dots in the interval of the maximum interval by the number of dots per unit time based on the time scale, the magnification from the minimum integration magnification to the maximum integration magnification is divided into multiple categories. Since a plurality of data integrated at a magnification corresponding to each section is averaged and each averaged data is held for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

  According to the present invention, the relationship between the number of hours for expressing one dot and the number of visible data is shown, and in the graph corresponding to the data type, the point at which the gradient sharply decreases is identified, and the point corresponding to the identified point Divide the magnification larger than the minimum integration magnification obtained by multiplying the number of dots by the number of dots per unit time into multiple sections, and average and average the multiple data integrated at the magnification corresponding to each section Since each piece of data is stored for each section, the creation speed of the database to be used can be improved. In addition, data corresponding to the display magnification of the graph set by the user is extracted from the database table, graphed, and displayed on the screen, so that it is possible to improve the data transmission speed while suppressing a decrease in visibility. Become.

It is a figure which shows the mode of a change of the expansion rate by pinch in / out. It is a figure which shows a mode that the space | interval of a plot point changes according to an expansion rate. It is a block diagram which shows schematic structure of the image display apparatus which concerns on this embodiment. It is a figure which shows an example of two adjacent data plots on a screen. It is a figure which shows a mode that the relationship between a data generation interval and the data number which has a generation interval shows normal distribution. It is a figure which shows the relationship between the number of seconds for expressing 1 dot, and the number of data which can be visually recognized. It is a figure which shows the area where visibility falls, and the area where visibility does not fall, taking the magnification rate on the horizontal axis and the number of display data on the vertical axis. It is a figure which shows the point with which the data with the minimum time interval overlap, and the point with which the data with the maximum time interval overlap. It is a figure which shows arrangement | positioning of a magnification. It is a flowchart which shows operation | movement of an image display apparatus. FIG. 6 is a diagram illustrating a schematic configuration of an image display system according to a second embodiment. FIG. 10 is a diagram illustrating a schematic configuration of an image display system according to a third embodiment. It is a figure which shows the example of a screen display of an electronic medical chart system. It is a figure which shows the example of a screen display of an electronic medical chart system. It is a figure which shows the example which divided the magnification.

  Hereinafter, embodiments of the present invention will be described. First, “expansion of time scale” in this specification is defined. “Expansion of time scale” means transition from a state where data is displayed in a small time span to a state where data is displayed in a large time span. Next, the “magnification rate” is defined. When “enlargement” occurs, the plot point is rewritten in the program. Specifically, an operation of reducing the interval between adjacent plot points is executed. The reduction ratio at this time is defined as “enlargement ratio”. Although this “magnification rate” depends on the implementation, for example, the “magnification rate” is changed on the screen of the tablet terminal based on a change in the interval between the fingers of the user when the user pinches in / out.

  FIG. 1 is a diagram showing how the enlargement ratio is changed by pinching in and out. In FIG. 1, the upper diagram of the drawing shows an example of a screen display before pinching, and the distance between coordinates touched by two fingers of the user is represented by m. On the other hand, the lower figure of the drawing shows an example of a screen display after pinching, and the distance between coordinates touched by the user's two fingers is represented by l. At this time, if the interval between the plot points is reduced according to the distance difference (ml) between the fingers, the graph on the display is “enlarged”.

  Here, using an arbitrary coefficient γ, the “magnification ratio” is expressed as γ (m−1). Since γ is arbitrary, it can be set to an appropriate value. If the user wants to “enlarge”, the value is set to a large value, while if the user wants to “enlarge” slowly, the value may be set to a small value.

  FIG. 2 is a diagram illustrating how the interval between plot points changes according to the enlargement ratio. As shown in FIG. 2, when the calculation is performed so that the interval between the plot points becomes 1 / γ (m−1) times when “enlarged”, the plot point interval changes according to the enlargement ratio, and the screen Seems to have “enlarged”.

  FIG. 3 is a block diagram illustrating a schematic configuration of the image display apparatus according to the present embodiment. In the image display device 10, the display unit 11 displays a plurality of data plotted in time series on a graph with dots. The scale changing unit 12 enlarges or reduces the time scale of the graph according to the display magnification of the graph set by the user. The steep slope specifying unit 13 indicates the relationship between the number of hours expressing one dot and the number of visible data, and specifies a point where the slope sharply decreases in the graph corresponding to the data type. The averaging processing unit 14 divides a magnification larger than the minimum integrated magnification obtained by multiplying the number of dots corresponding to the point specified by the steep slope specifying unit 13 by the number of dots per unit time into a plurality of sections, A plurality of data integrated at a magnification corresponding to each division is averaged. The database table 15 holds each data averaged by the averaging processing unit 14 for each section. The screen control unit 16 extracts data corresponding to the display magnification of the graph set by the user from the database table, graphs it, and displays it on the screen. Each of the above-described components is connected by a control bus 17 so that signals can be transmitted / received to / from each other.

  Generally, when data existing in the natural world is plotted in time series, there are many deviations in the generation interval. Taking data used in medicine as an example, for example, data related to a medication occurrence event of a patient with chronic diabetes is taken every 3 to 4 hours because a blood glucose improving agent is taken after each meal and a blood glucose test is performed after each meal. It often occurs at intervals of about once, and often does not take intervals of several minutes or years.

  Furthermore, for examples other than the data used in medical care, since seeding and harvesting are determined by changes in the seasons in agriculture, etc., events will occur at an interval of about once a year. .

  As described above, in a system that displays from a small time span to a large time span, such as a system having representations of seconds, minutes, hours, days, months, years, and 10 years, data having such various time spans. Can be expressed by plotting, so it is suitable for grasping the transition of time-series data from a bird's-eye view.

  By the way, when the above data is expressed by time-series plotting on the system, the visibility of the graph is lowered as described above. In addition, the area where the visibility degradation occurs is greatly biased depending on the type of time-series data to be displayed. In other words, since the average period of the data generation interval varies depending on the properties of the data to be displayed, the tendency of the visibility reduction greatly varies depending on the time span determined by the average period. If such a bias is graphed by taking the time width for displaying data on the horizontal axis and the number of data plots on which the vertical axis can be displayed, it can be estimated that a sigmoid shape is taken. The reason will be described below.

FIG. 4 is a diagram illustrating an example of two adjacent data plots on the screen. In FIG. 4, for example, consider two adjacent data plots of the αth and (α + 1) th. The start times of the data plots are defined as t _s α (seconds) and t _s (α + 1) (seconds), respectively. At this time, as shown in FIG.
{T _s (α + 1) −t _s α} (seconds)
It is expressed as Here, on the system, assuming that 1 second = a (dot), this interval is
a {t _s (α + 1) −t _s α} (dot)
It is expressed as

Next, consider the data plot interval when the user performs a pinch-in operation on the screen. If the data plot interval a {t _s (α + 1) −t _s α} before pinch-in is multiplied by 1 / γ (m−1), the data plot interval on the screen changes. In other words, the data plot interval after pinch-in is
a {t _s (α + 1) −t _s α} · 1 / γ (m−l)
It becomes.

Assuming that the size that can be visually recognized by humans is one dot on the display, if the data plot interval is smaller than one dot, the two data cannot be distinguished with the naked eye. You will see. Therefore, it is possible to represent the two data with a single data. That is, when the following equation is satisfied, the two data are integrated.
a {t _s (α + 1) −t _s α} · 1 / γ (m−1) <1
It should be noted that the best visibility can be ensured by setting the size that can be visually recognized by humans to 1 dot, which is the most severe condition.

  Here, in order to efficiently handle data plots, the present inventors set up a system to handle a minimum amount of data when generating a graph displayed at various magnifications. In view of the fact that the data is merged in advance according to a specific enlargement ratio and stored in the database, it is found that efficient graph creation is possible, and the present invention has been achieved. It was.

When the enlargement ratio γ (m−1) is represented by E, the above formula is simplified as follows.
a {t _s (α + 1) −t _s α} · 1 / E <1
Here, how the number of visible plots changes according to the enlargement ratio E will be considered. By formula transformation,
a {t _s (α + 1) −t _s α} <E
Is obtained. This expression means that merging (integration) may be performed if the plot interval between two data is equal to or smaller than a certain enlargement ratio. As a result, it can be understood that the enlargement ratio E when merging is proportional to the data generation interval {t _s (α + 1) −t _s α}.

  Next, consider the data generation interval. In the case of medical data, the data generation interval often follows a certain cycle. For example, a diabetic patient injects insulin after a meal, administers medication, or performs a blood glucose level test 2 hours after the meal. This means that approximately 3 or 4 hours corresponds to the data generation interval. However, since such data is natural data, “fluctuation” always occurs. For example, in the above example, the time to eat dinner was 6 o'clock yesterday, but today it was 7 o'clock. Considering the existence of such “fluctuations”, the data generation interval is considered to follow a normal distribution having an average period as an average.

  FIG. 5 is a diagram showing how the relationship between the data generation interval and the number of data having the generation interval shows a normal distribution. As described above, since the enlargement rate E is proportional to the data generation interval, even if the data generation interval on the horizontal axis in FIG. Here, consider the distribution of the number of data that can be displayed when the enlargement ratio is gradually increased from the smallest enlargement ratio in the normal distribution. This can be obtained by a cumulative normal distribution function obtained by accumulating the above normal distribution. This cumulative normal distribution function is known to be a sigmoid function. The sigmoid function has a characteristic that the slope of the graph increases rapidly at a certain moment. This means that when the enlargement ratio increases, data that cannot be displayed on the display starts to be generated at a certain moment.

  FIG. 6 is a diagram illustrating the relationship between the number of seconds for expressing one dot and the number of visible data. Here, as an example, data when a certain capsule is administered to a patient is plotted. As shown in FIG. 6, it can be seen that in such data, the visibility is greatly reduced on the scale of years and 10 years. This is considered to be a graph like this because medication is often performed in units of one month or several days. Considering other examples, since examinations such as medical examinations are often performed once a year, it is expected that visibility will be reduced on a scale larger than the 10-year scale. In addition, if data such as heartbeats are used, data is plotted in units of a few seconds, so that it is expected that visibility will be severely reduced on a time scale or the like. Furthermore, if chemical reactions in nanosecond units are plotted, it is expected that visibility will be severely reduced on the second scale.

  FIG. 7 is a diagram illustrating a section in which the visibility is lowered and a section in which the visibility is not lowered, with the enlargement ratio on the horizontal axis and the number of display data on the vertical axis. That is, in the section where the visibility is lowered, the data is transmitted in a finely divided manner, while in the section where the visibility is not lowered, the data may be transmitted roughly. Here, if the data is registered in the database in a merged form in advance, the processing speed can be improved. In the section where fine transmission is required as described above, the data is registered by dividing the enlargement rate finely, and in the section where rough data transmission is necessary, only one table on the database is required.

  That is, in the sigmoid shape as shown in FIG. 6 and FIG. 7, if the time span where the sigmoid function has a steep slope can be determined, the data plots that are not visible in the data table in the larger time span are displayed in the respective data plots. Therefore, it is not necessary to calculate from the interval, and the calculation load can be reduced. In addition, after the steep slope is determined, the magnification is finely set in the steep slope, and the calculation for collecting the data whose visibility is reduced may be sequentially executed from the table with the low magnification.

As described above, assuming that the enlargement ratio is E and expressed by a dot per second, two data are integrated when the following expression is satisfied.
a {t _s (α + 1) −t _s α} <E
Since E is determined for each table, the above is calculated for each E, and if there is one that satisfies the inequality, the data may be combined into two. At this time, if the two data have different values, an averaging process or the like is performed.

As a specific steep slope detection method, the following method is used. FIG. 8 is a diagram illustrating a point where data having the minimum time interval overlap and a point where data having the maximum time interval overlap.
Step 1: At the time of data input, an interval between the input data and the previous data is held.
Step 2: The minimum interval is extracted from the held intervals.
Step 3: Calculate the time span when it becomes invisible when the minimum interval is reduced.
Step 4: Estimate the time span calculated in the above step as a steep slope with reduced visibility, and sequentially create a data table having a higher magnification than the data table of the corresponding magnification.

  As described above, it is possible to suppress a reduction in the visibility of the graph by creating a data table by finely dividing the magnification in the visibility reduction section. FIG. 9 is a diagram showing the arrangement of magnifications. As shown in FIG. 9, a magnification of 2 is set in a section where the visibility is lowered, and a magnification of 3 or 5 is arranged in a section where the visibility is not lowered. Then, a data table is created for each of these magnifications, and when drawing a graph, the data table is used according to the display magnification designation of the user's graph.

  The operation of the image display apparatus according to the present embodiment configured as described above will be described. FIG. 10 is a flowchart showing the operation of the image display apparatus according to this embodiment. First, data is input (step S1). Next, the time of each data is acquired (step S2). Next, the time width with the previous data is calculated (step S3). At this time, the time of the previous data is also acquired (step S4). Next, it is determined whether the minimum / maximum time width needs to be rewritten (step S5). If it is not necessary to rewrite the minimum / maximum time width in step S5, the process proceeds to step S8. On the other hand, when it is necessary to rewrite the minimum / maximum time width in step S5, the maximum / minimum time width rewriting process is performed (step S6), and the maximum / minimum time width is acquired (step S7). Make a decision.

  Next, the enlargement ratio at which the visibility is lowered is calculated (step S8). That is, steep slope points are detected. Data is read from the database table of one level lower (step S9), the enlargement ratio is incremented (step S10), and the database table is created (step S11). Next, it is determined whether or not the maximum enlargement ratio has been reached (step S12). If the maximum enlargement ratio has not been reached, the process proceeds to step S10. On the other hand, if the maximum enlargement ratio is reached in step S12, the process is terminated.

  Thereby, the creation speed of the database to be used can be improved. In addition, since the data is graphed and displayed on the screen, it is possible to improve the data transmission speed while suppressing a decrease in visibility.

Examples of the present invention will be described below. Here, for the sake of simplicity, let us consider the case of three data. The following three data are used.
(Start time (seconds), value) =
(1108629000, 1) ... x1.
(1108665600, 1) ... Let x2.
(1108715400, 2) ... x3.

  In step 1 above, the interval of each data is stored. Each data interval is 36600 seconds between x1 and x2, and 49800 seconds between x2 and x3. Therefore, the minimum data interval shown above is 36600 seconds. As described above, assuming that 1 second is represented by a dot, if a × (data interval) is smaller than the enlargement rate, the two data overlap. If the time span from which the magnification is calculated, that is, the smallest time span (referred to as the minimum integration magnification) is expressed by 1 second = 24 dots (a = 24), the minimum data interval is 24 × 36600 = 878400 dots. Similarly, the maximum data interval (referred to as the maximum integration magnification) is 24 × 49800 = 1195200 dots.

  In other words, if there is only the above three data, the data will be integrated for the first time when enlarged to 878400 times, and all the data will be integrated when enlarged to 1195200 times. Visibility decreases from this minimum integration magnification of 878400 times to the maximum integration magnification of 1195200 times, so that the magnification is divided between these to make the data correspond to each magnification. Create it.

For example, if a transmission number is set at a magnification as shown in FIG. 14 and a data table is created for each transmission number, between a minimum integration magnification of 878400 times and a maximum integration magnification of 1195200 times, The magnification is divided most finely, and the data visibility is minimized. In this example, since this magnification is included in the transmission numbers 13 to 18, only the data table of this transmission number needs to be created. Transmission numbers 19 and higher use the same ones as 18 and transmission numbers 13 and lower use raw data as they are.
・ Transmission number 13 or less: Raw data table (data table including unexpanded data)
・ Transmission number 14 ・ ・ ・ 1166400 times ・ Transmission number 15 ・ ・ ・ 2332800 times ・ Transmission number 16 ・ ・ ・ 4665600 times ・ Transmission number 17 ・ ・ ・ 9331200 times ・ Transmission number 18 or more ・ ・ ・ 18662400 times

When the transmission number is 14, the data of x1 and x2 are integrated. During this integration, new data is registered in the database as follows. here,
(Data start time, value, number of original data) = (1108629000, 1, 2) ... x12
And

  Further, the data table of transmission number 15 is calculated using the data table of transmission number 14. Similarly, calculate 16 using 15 data tables. In the data table of transmission number 15, x12 and x3 are integrated. At this time, since the values of the respective data are 1 and 2, it is necessary to average them.

Since x12 stores information that two data are integrated, the total value of x1 and x2 before synthesis can be calculated as 1 × 2 = 2. When this 2 and x3 2 are averaged,
Total value / number of data = (1 × 2 + 2) / 3 = 4/3
Can be calculated. And the new data is as follows.
(Data start time, value, number of original data) = (1108629000, 4/3, 3) ... x123
And This is the contents of the data table of transmission number 15.

As a general example other than the above, the present invention can be applied to an example of an application in which a user designates a magnification and creates a graph corresponding to the magnification. For example, according to the above numerical example, since the minimum integration magnification is 878400 times and the maximum integration magnification is 1195200 times, this magnification is divided finely and a database table is created for each magnification. For example, when a data table is created for each magnification of 1.1, a data table corresponding to the following magnification is prepared.
-Raw data table-878400 times (Data table 1)
・ 878400 × 1.1 = 966240 times (Data table 2)
・ 966240 × 1.1 = 1062864 times (Data table 3)
・ 1062864 × 1.1 ≒ 1169150 times (Data table 4)
1169150 × 1.1 = 1286065 times> 1195200 times (data table 5) (In this case, 1195200 times are used as data table 5)

If a data table is specified for each magnification specified by the user when displaying the graph and a graph is created for each data table, the graph can be created with a minimum number of data searches.
User specified magnification is less than 87400 ... Raw data table is used User specified magnification is 87400 or more and less than 966240 ... Data table 1 is used User specified magnification is 966240 or more and less than 1062864 ... Data table 2 is specified by user Magnification is 1062864 or more and less than 1169150… Use data table 3 Magnification specified by user is 1169150 or more and less than 1195200… Use data table 4 Magnification specified by user is 1195200 or more… Use data table 5

  In the above example, the number of data is only 3. However, when the number of data reaches several hundreds or thousands, it is clear that the data search becomes a bottleneck for graph drawing. Thus, the drawing time can be shortened.

  FIG. 11A is a diagram illustrating a schematic configuration of the image display system according to the second embodiment. This image display system includes a client device 110 and a server device 120, and transmits and receives data to and from each other via a communication network 130. The client device includes a display unit 111, a scale change unit 112, and a screen control unit 113, and these components are connected to each other via a control bus 114. The server device 120 includes a steep slope specifying unit 115, an averaging processing unit 116, and a database table 117, and these components are connected to each other via a control bus 118. The server device 120 shows the relationship between the number of hours for expressing one dot and the number of data that can be visually recognized, and identifies the point at which the gradient sharply decreases in the graph corresponding to the data type. Further, a magnification larger than the minimum integration magnification obtained by multiplying the number of dots corresponding to the specified point by the number of dots per unit time is divided into a plurality of divisions and integrated at a magnification corresponding to each division. Average multiple data. Further, each averaged data is held in the database table 117 for each section.

  Note that the server device 120 obtains the minimum integration magnification obtained by multiplying the number of dots at the minimum interval among adjacent data intervals on the graph by the number of dots per unit time based on the time scale, and the graph. According to the maximum integration magnification obtained by multiplying the number of dots of the maximum interval among adjacent data intervals by the number of dots per unit time based on the time scale, multiple magnifications from the minimum integration magnification to the maximum integration magnification can be set. A plurality of data divided into sections and integrated at a magnification corresponding to each section may be averaged.

  The client device 110 acquires data corresponding to the display magnification of the graph set by the user from the database table 117 of the server device 120, graphs it, and displays it on the screen.

  FIG. 11B is a diagram illustrating a schematic configuration of the image display system according to the third embodiment. This image display system includes a client device 140 and a server device 150, and transmits and receives data to and from each other via a communication network 130. The client device includes a display unit 111, a scale change unit 112, and a screen control unit 113, and these components are connected to each other via a control bus 114. The server device 150 includes a steep slope identification unit 115, an averaging processing unit 116, a database table 117, and a graph creation unit 119, and these components are connected to each other via a control bus 118. The graph creation unit 119 functions to read and draw data. The server device 150 indicates the relationship between the number of hours for expressing one dot and the number of data that can be visually recognized, and identifies the point where the gradient decreases rapidly in the graph corresponding to the data type. Further, a magnification larger than the minimum integration magnification obtained by multiplying the number of dots corresponding to the specified point and the number of dots per unit time is divided into a plurality of categories, and integrated at a magnification corresponding to each category. Average multiple data. Each averaged data is stored in a database table for each category, and data corresponding to the display magnification of the graph set by the user via the client device 140 is acquired from the database table and graphed.

  The server device 150 uses the minimum integration magnification obtained by multiplying the number of dots at the minimum interval among the intervals between adjacent data on the graph by the number of dots per unit time based on the time scale, and the graph. In accordance with the maximum integration magnification obtained by multiplying the number of dots of the maximum interval among adjacent data intervals by the number of dots per unit time based on the time scale, a plurality of magnifications from the minimum integration magnification to the maximum integration magnification are obtained. A plurality of data is averaged by dividing into a plurality of divisions and integrated at a magnification corresponding to each division, each averaged data is held in a database table for each division, and set by the user via the client device Data corresponding to the display magnification of the graph may be acquired from the database table and graphed.

  The client device 140 acquires the graphed data from the server device 150 and displays it on the screen.

  Note that the characteristic operations of the present invention as described above can also be realized by causing a computer to execute a program. That is, the program of the present invention is a program of an image display device that displays a plurality of data plotted in time series on a graph with dots, according to the display magnification of the graph set by the user, A process for enlarging or reducing the time scale of the graph, a process for indicating the relationship between the number of hours for expressing one dot and the number of visible data, and for identifying a point at which the gradient sharply decreases in the graph corresponding to the data type And dividing a magnification larger than the minimum integration magnification obtained by multiplying the number of dots corresponding to the specified point by the number of dots per unit time into a plurality of categories, and integrating them at a magnification corresponding to each category. A process for averaging a plurality of data, a process for holding each averaged data in a database table for each category, and a user setting. A process of extracting data corresponding to the display magnification of the graph from the database table that is, a process of displaying on the screen as a graph of data that the extracted, a series of processes, to be executed by a computer.

  The program of the present invention is a program of an image display device that displays a plurality of data plotted in time series on a graph with dots, and the graph is displayed according to the display magnification of the graph set by a user. Processing that expands or reduces the time scale of the data, and the minimum integration obtained by multiplying the number of dots of the smallest interval among the intervals of adjacent data on the graph by the number of dots per unit time based on the time scale From the minimum integration magnification, according to the magnification and the maximum integration magnification obtained by multiplying the number of dots of the maximum interval among the adjacent data intervals on the graph by the number of dots per unit time based on the time scale. Divide the magnification up to the maximum integration magnification into a plurality of divisions, and average the plurality of data integrated at the magnification corresponding to each division A process of holding the averaged data in the database table for each of the categories, a process of extracting data corresponding to the display magnification of the graph set by the user from the database table, and the extraction The computer is caused to execute a series of processes including graphing the displayed data and displaying it on the screen.

  Thereby, the creation speed of the database to be used can be improved. In addition, it is possible to improve the data transmission speed while suppressing a decrease in visibility.

DESCRIPTION OF SYMBOLS 10 Image display apparatus 11 Display part 12 Scale change part 13 Steep slope specific part 14 Averaging process part 15 Database table 16 Screen control part 17 Control bus 110 Client apparatus 111 Display part 112 Scale change part 113 Screen control part 114 Control bus 115 Steep Gradient identification unit 116 Averaging processing unit 117 Database table 118 Control bus 119 Graph creation unit 120 Server device 130 Communication network 140 Client device 150 Server device

Claims (9)

An image display device that displays a plurality of data plotted in time series on a graph as dots,
A scale changing unit for enlarging or reducing the time scale of the graph according to a display magnification of the graph set by a user;
A steep slope identifying unit that indicates a relationship between the number of hours for expressing one dot and the number of visible data, and that identifies a point at which the slope sharply decreases in the graph corresponding to the data type;
Dividing the minimum integration greater magnification than the magnification obtained by multiplying the number of dots per a plot interval and unit of data adjacent at a specific and point time a plurality of sections, the integration rate corresponding to each segment An averaging processing unit that averages a plurality of data to be processed,
A database table that holds the averaged data for each of the sections;
An image display apparatus comprising: a screen control unit that extracts data corresponding to a display magnification of the graph set by a user from the database table, displays the data in a graph, and displays the graph on a screen. An image display device that displays a plurality of data plotted in time series on a graph as dots,
A scale changing unit for enlarging or reducing the time scale of the graph according to a display magnification of the graph set by a user;
The minimum integration rate obtained by multiplying the minimum data interval among adjacent data intervals on the graph by the number of dots per unit time based on the time scale, and the interval between adjacent data on the graph According to the maximum integration rate obtained by multiplying the maximum data interval by the number of dots per unit time based on the time scale, the magnification from the minimum integration rate to the maximum integration rate is divided into a plurality of sections, An averaging processing unit for averaging a plurality of data integrated at a magnification corresponding to each of the sections;
A database table that holds the averaged data for each of the sections;
An image display apparatus comprising: a screen control unit that extracts data corresponding to a display magnification of the graph set by a user from the database table, displays the data in a graph, and displays the graph on a screen.   The database table holds the number of the averaged data, and sequentially holds data included in each section using data included in the section corresponding to the minimum integration magnification. The image display device according to claim 1 or 2. An image display system comprising a client device and a server device, and displaying a plurality of data plotted in a time series on a graph in dots on a screen of the client device,
The server device
Indicate the relationship between the number of hours that represent one dot and the number of visible data, and identify the point where the slope sharply decreases in the graph corresponding to the data type,
Dividing the minimum integration greater magnification than the magnification obtained by multiplying the number of dots per a plot interval and unit of data adjacent at a specific and point time a plurality of sections, the integration rate corresponding to each segment Average multiple data
Each averaged data is stored in a database table for each of the categories,
The client device is
An image display system, wherein data corresponding to a display magnification of the graph set by a user is acquired from a database table of the server device, graphed, and displayed on a screen. An image display system comprising a client device and a server device, and displaying a plurality of data plotted in a time series on a graph in dots on a screen of the client device,
The server device
The minimum integration rate obtained by multiplying the minimum data interval among the adjacent data intervals on the graph by the number of dots per unit time based on the time scale of the graph, and the adjacent data on the graph Dividing the magnification from the minimum integration magnification to the maximum integration magnification into a plurality of sections according to the maximum integration magnification obtained by multiplying the maximum data interval among the intervals by the number of dots per unit time based on the time scale And averaging a plurality of data integrated at a magnification corresponding to each category,
Each averaged data is stored in a database table for each of the categories,
The image display system, wherein the client device acquires data corresponding to a display magnification of the graph set by a user from a database table of the server device, graphs the data, and displays the graph on a screen. An image display system comprising a client device and a server device, and displaying a plurality of data plotted in a time series on a graph in dots on a screen of the client device,
The server device
Indicate the relationship between the number of hours that represent one dot and the number of visible data, and identify the point where the slope sharply decreases in the graph corresponding to the data type,
Dividing the minimum integration greater magnification than the magnification obtained by multiplying the number of dots per a plot interval and unit of data adjacent at a specific and point time a plurality of sections, the integration rate corresponding to each segment Average multiple data
Each averaged data is stored in a database table for each of the categories,
Data corresponding to the display magnification of the graph set by the user via the client device is obtained from the database table, and is graphed.
The client device is
An image display system, wherein the graphed data is acquired from the server device and displayed on a screen. An image display system comprising a client device and a server device, and displaying a plurality of data plotted in a time series on a graph in dots on a screen of the client device,
The server device
The minimum integration rate obtained by multiplying the minimum data interval among the adjacent data intervals on the graph by the number of dots per unit time based on the time scale of the graph, and the adjacent data on the graph Dividing the magnification from the minimum integration magnification to the maximum integration magnification into a plurality of sections according to the maximum integration magnification obtained by multiplying the maximum data interval among the intervals by the number of dots per unit time based on the time scale And averaging a plurality of data integrated at a magnification corresponding to each category,
Each averaged data is stored in a database table for each of the categories,
The data corresponding to the display magnification of the graph set by the user via the client device is acquired from the database table, and graphed,
The client device is
An image display system, wherein the graphed data is acquired from the server device and displayed on a screen. A program for an image display device that displays a plurality of data plotted in time series on a graph with dots,
A process of enlarging or reducing the time scale of the graph according to the display magnification of the graph set by the user;
A process of showing the relationship between the number of hours for expressing one dot and the number of data that can be visually recognized, and specifying a point at which the gradient sharply decreases in the graph corresponding to the data type;
Dividing the minimum integration greater magnification than the magnification obtained by multiplying the number of dots per a plot interval and unit of data adjacent at a specific and point time a plurality of sections, the integration rate corresponding to each segment Processing to average multiple data
A process of holding each averaged data in a database table for each of the sections;
Processing for extracting data corresponding to the display magnification of the graph set by the user from the database table;
A program for causing a computer to execute a series of processes of processing the extracted data into a graph and displaying it on a screen. A program for an image display device that displays a plurality of data plotted in time series on a graph with dots,
A process of enlarging or reducing the time scale of the graph according to the display magnification of the graph set by the user;
The minimum integration rate obtained by multiplying the minimum data interval among adjacent data intervals on the graph by the number of dots per unit time based on the time scale, and the interval between adjacent data on the graph According to the maximum integration rate obtained by multiplying the maximum data interval by the number of dots per unit time based on the time scale, the magnification from the minimum integration rate to the maximum integration rate is divided into a plurality of sections, A process of averaging a plurality of data integrated at a magnification corresponding to each of the sections;
A process of holding each averaged data in a database table for each of the sections;
Processing for extracting data corresponding to the display magnification of the graph set by the user from the database table;
A program for causing a computer to execute a series of processes of processing the extracted data into a graph and displaying it on a screen.

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