JP2003196671A - Drawing image erasing method, program according to the method, and storage medium storing the program - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a drawn image erasing method and the like which can efficiently erase only a drawing portion of a drawing type to be erased. SOLUTION: In a drawn image erasing method for erasing a drawn image on a display screen using an eraser cursor, when an eraser button 37 being displayed is selected, an eraser cursor 38 and a cursor rectangular area 39 attached thereto are displayed. The eraser cursor 38 is moved in accordance with the operation, and only the drawing type of the drawing type automatically touched by the cursor rectangular area 39 and the drawing type selected from the menu in association with the drawing mode is selected. It was configured to erase. Further, when the all erase button is selected, all the drawing portions of the drawing type automatically selected in association with the drawing mode or the drawing type selected from the menu are deleted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for erasing a drawn image in an electronic blackboard system using a display device with a coordinate input function, a personal computer using a mouse, etc. A method for erasing a drawn image that can be performed.

[0002]

2. Description of the Related Art Conventionally, a personal computer has been provided with a pointing device called a mouse, and a user moves the mouse to move a pointing cursor (drawing cursor, hereinafter simply referred to as cursor) displayed on the screen. Then, by moving the cursor to the desired position and momentarily pressing the button provided by the mouse in that state (hereinafter, this operation is referred to as clicking operation), the control unit of the personal computer performs the clicking operation. Recognize and acquire the coordinate information input from the mouse at that time. In this way, the control unit recognizes, for example, what has been instructed, and executes control according to the instruction. Further, in order to further improve the operability, an electronic blackboard system or a personal computer equipped with a display device with a coordinate input function, which can indicate a position on the screen by touching a desired position on the screen with a finger or the like And so on. In an electronic blackboard system or a personal computer using such a display device with a coordinate input function, when the cursor is located at a certain position on the screen, touching another position on the screen causes the cursor to move to the touched position. It can be moved, and the action corresponding to clicking the left mouse button at the touch position can be performed. Further, by using the mouse and the display device or the display device with the coordinate input function described above, it is possible to perform drawing of each drawing type such as handwritten line drawing, ruled line drawing, graphic drawing, stamp drawing, and text drawing on the screen. However, the eraser cursor can be moved to erase the drawn image in the drawing area touching the eraser cursor. For example, a toolbar composed of buttons (icons) corresponding to a plurality of drawing functions to be selected is displayed at the top of the screen, and the user selects the eraser button, which is one of the buttons in the toolbar. Display an eraser cursor in the shape of a cursor, and let the user drag the eraser cursor (in the case of a display device with a coordinate input function, for example, move the fingertip while touching the eraser cursor), and then eraser cursor It erases the drawn image of the area touched by.

For example, in the tablet input device disclosed in Japanese Patent Laid-Open No. 5-88810, a switch is provided in a special pen used for touching the screen, the operation mode is switched by the switch, and the special pen is used for drawing. Or as an eraser. With this conventional technique, it is also possible to adjust the size of the eraser.
The smaller the eraser size is, the smaller the minimum unit for deleting the drawn image is.Therefore, if you display the eraser icons of multiple sizes, you can select the small eraser icon when you want to erase a part of a small area. is there. However, when the eraser cursor touches the drawing parts of multiple drawing types such as handwriting line drawing, figure drawing, ruled line drawing, stamp drawing, and text drawing, if all the touched parts are erased, the part of the drawing type for which the drawing is confirmed is deleted. This causes the trouble of redrawing. Therefore, prepare an eraser button for each drawing type on the toolbar, or select one eraser button on the toolbar and the eraser button for each drawing type from the pull-down menu to select one of the drawn images with multiple drawing types. A conventional technique has been provided in which only the drawing type of can be erased.

The following is known as a coordinate input / detection device of the display device with coordinate input function according to the present invention. The first example is X- on the coordinate input surface.
Wires are provided in a grid pattern in the Y direction, and the current flowing through the wire is changed by using a dedicated pen that generates a magnetic field, and the coordinates of the position where the dedicated pen is approached are detected. In the second example, a resistance film such as conductive rubber is used for the coordinate input surface. When a pen or finger is brought into contact with the coordinate input surface to indicate a desired position, the resistance of that position on the coordinate input surface is changed. Since the value changes due to pressure, the coordinates of the position are detected by detecting the resistance value. This method is called a touch panel method, and there are various ways to realize it. Further, in the third example, a light beam is emitted from the two light emitting portions via the rotary polygon mirror to scan the coordinate input surface, and the reflected light from the reflecting member provided at the tip of the pen is changed to two.
The pen insertion position is detected by one light receiving section (see Japanese Patent Laid-Open No. 57-211637). The light is received by the two light receiving units, and the coordinates of the designated position are calculated using the principle of triangulation. This coordinate input /
The coordinate input surface in the detection device is not a physical surface like the coordinate input surface in the coordinate input / detection devices of the first and second examples, but a surface formed by the light beam emitted from the light emitting portion. .

In addition to the above-mentioned Japanese Patent Laid-Open No. 57-212637, the prior art disclosed in Japanese Patent Laid-Open No. 9-91094 is an optical coordinate input / detection device shown as a third example. In the conventional technique, light emitting / receiving portions are provided in the lower left and right corners of the coordinate input surface, and the respective light emitting / receiving portions are provided.
The light beam is emitted from the light receiving part while changing the emission direction (emission angle), the coordinate input surface is scanned, and the light beam is folded back by the corner cube array (light retroreflecting means) provided on the upper and left and right sides of the panel. Then, the light beams returned by the respective light emitting / receiving units are detected (reflected in the returning direction). This makes it possible to detect the scanning angles of the left and right light emitting / receiving portions where the light beam is blocked by a finger or the like, and the coordinates of the designated position can be calculated using the principle of triangulation. In addition, JP-A-11-11011
The conventional technique disclosed in Japanese Patent No. 16 is also an optical coordinate input / detection device shown as a third example. In this conventional technique, light emitting / receiving portions are provided, for example, in upper and left corners of the coordinate input surface. The light beam is emitted from each light emission / reception part while changing the emission direction (emission angle), the coordinate input surface is scanned, and the light beam is folded back by the light retroreflecting means provided on the lower side and left and right sides of the panel. Then, the light beams returned by the respective light emitting / receiving units are detected (reflected in the returning direction). As a result, the coordinates of the instructed position are calculated by detecting the light blocking range of the scanning angles of the left and right light emitting / receiving parts where the light beam is blocked by the finger or the like.

[0006]

However, in the case of the prior art in which the eraser button for each drawing type described above is prepared and selected from among them, the effective work area becomes narrower as the number of buttons increases, and in what case However, since the eraser selection and the drawing type selection corresponding to the drawing type to be erased must be performed, the number of operations increases, and thus the work efficiency deteriorates. An object of the present invention is to solve such a problem of the conventional technique, and specifically, to provide a drawn image erasing method or the like that can efficiently erase only a drawing portion of a drawing type to be erased, At the same time, it is to provide related functions that can improve convenience.

[0007]

In order to solve the above-mentioned problems, according to the invention of claim 1, in the drawn image erasing method for erasing the drawn image on the display screen by using the eraser cursor, the eraser displayed is displayed. When the button is selected,
Display the eraser cursor, move the eraser cursor according to the operation, touch the eraser cursor or the area attached to the eraser cursor, and select the drawing type or menu that is automatically selected in association with the drawing mode. Only the drawing part of the selected drawing type is deleted. In the invention according to claim 2, in the invention according to claim 1, when the all erase button is selected, the drawing type automatically selected in association with the drawing mode or the drawing type selected from the menu is selected. The configuration is such that all the drawn parts are erased. In the invention according to claim 3, in the invention according to claim 1 or 2, when the erase all button is selected, if there is no drawing portion of the selected drawing type, the drawing type is selected. The menu was automatically displayed. In the invention according to claim 4, in the invention according to claim 1, when the eraser button is further selected in the eraser mode, a menu for selecting a drawing type is automatically displayed.

According to the invention of claim 5, claim 1
In the invention described above, when the touch coordinates are stopped for a predetermined time or more in the partial erase mode, the mode is automatically changed to the enclosure erase mode in which the drawn image in the rectangular area generated according to the operation is erased. Further, in the invention described in claim 6, in the invention described in claim 5, the configuration is such that when the execution of the erasure is completed, the mode is automatically returned to the partial erasure mode. Further, in the invention described in claim 7, in the invention described in claim 5, a cursor different from that in the partial erase mode is displayed when the mode is shifted to the erase mode.
In the invention according to claim 8, in the invention according to claim 5, the predetermined time period can be input and registered. Further, according to the invention of claim 9,
In the invention according to claim 2, claim 3, or claim 5, the drawing mode is configured to hold the drawing mode at that time. According to a tenth aspect of the present invention, the program operating on the information processing device is a program programmed according to the drawn image erasing method according to any one of the first to ninth aspects. In addition, claim 11
In the described invention, the program according to claim 10 is stored in a storage medium storing the program.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a system configuration diagram of an electronic blackboard system showing an embodiment of the present invention. As shown in the figure, the electronic blackboard system of this embodiment comprises a display device with coordinate input function 1 and a control device 2 realized by, for example, a personal computer. The display device with coordinate input function 1 also displays a coordinate detection unit that optically detects a position on the screen touched by a finger or the like and sends the position to the control device 2, and image data sent from the control device 2. The display unit is provided. The coordinate detection unit displays the resolution of the display screen (for example, the number of dots in the X axis direction: 1024, the number of dots in the Y axis direction: 7
68) Detecting the X and Y coordinates on the display screen corresponding to
The coordinate data is transmitted to the control device 2.

Hereinafter, referring to FIG. 2, the coordinate detecting section of the display device with coordinate input function 1 will be described first. As shown in the figure, this coordinate detection unit includes, for example, one light emission detector 11 at each of the lower left and right corners of the screen 13, and a light reflection film 12 surrounding the screen at the upper and left and right edges of the screen. It has a different structure. With such a structure, the light emission detector 11 emits irradiation light, and the light reflection film 12 having a structure known to those skilled in the art reflects the irradiation light in the direction in which it enters (recursively reflects it). ), The light emission detector 11 detects the irradiation light emitted by itself. The light emission detector 11 has a polygonal rotary body, and the entire rotary screen is scanned by rotating the polygonal rotary body and changing the emission direction of the irradiation light to continue emission. With such a structure, when an object (eg, finger) that blocks light is present on the screen, the irradiation light emitted from the light emission detector 11 is not reflected by the light reflection film 12, and therefore the light emission detector 11 Since the light emission detector 11 detects the amount of reflected light, the emission direction at that time, that is, the direction θL of the object seen from the left light emission detector 11 (see FIG. 2), the right direction The direction θR (see FIG. 2) of the object viewed from the light emission detector 11 can be acquired. In this way, the coordinate detection control unit in the coordinate detection unit calculates the coordinates X and Y from the screen width W (see FIG. 2) and θL and θR by the following formula. X = W × tan θR ÷ (tan θL + tan θR) Y = H−W × tan θL × tan θR ÷ (tan θL +
tan θR)

Next, the control device 2 will be described. As shown in FIG. 1, the control device 2 controls the entire control device 2 including the control of the display device with coordinate input function 1 according to a control program, executes a drawing process, manages a program and various applications. Corresponding to a CPU 21 that executes processing according to a program, a ROM 22 that stores a part of the control program, a RAM 23 that temporarily stores various data and various programs, and a screen of the display device 1 with a coordinate input function. An image RAM 24 for storing image data, a hard disk device (HDD) 25 for storing various data and various programs, a hard disk interface 26 for reading and writing from the hard disk device 25, a CPU 21 for measuring time.
Coordinates having standard interface specifications such as timer 27, RS232C or USB for notifying to the coordinate detecting unit of the coordinate input function-equipped display device 1 and receiving coordinate data sent from the coordinate detecting unit and passing to the CPU 21. An input interface 28, an image output interface 29 for outputting the image data expanded in the image RAM 24 to the display unit of the display device 1 with the coordinate input function, and the like are provided. In addition,
In this embodiment, a program programmed according to the drawn image erasing method of the present invention is stored in the hard disk device 25, read out to the RAM 23 at the time of execution, and the CPU 21 executes the drawn image erasing described below according to the program. With such a configuration, the control device 2 of the electronic blackboard system draws with a fingertip or the like on the screen of the display device 1 with coordinate input function based on the position information (coordinate data) obtained from the display device 1 with coordinate input function. can do. Also,
By moving the displayed eraser cursor, a desired portion in the drawn image can be erased.

The type of drawing (drawing mode, drawing type) in this embodiment will be described below with reference to FIG. In this embodiment, at the time of drawing, the toolbar 31 (see FIG. 3) created and stored in advance is displayed. As shown in the figure, the toolbar 31 is composed of a plurality of buttons (icons) for selecting a drawing mode or the like. By touching any of these buttons, handwriting line drawing, ruled line drawing, graphic drawing, stamp drawing, text drawing, etc. are selected as drawing modes. Of these drawing modes, in the ruled line drawing mode,
A chart (ruled line) 32 as shown in FIG. 3 is drawn. In this ruled line drawing mode, even if you do not perform an accurate horizontal or vertical drag operation (an operation to move while touching the screen with your finger etc.), you can perform horizontal line drag operation in horizontal direction and vertical line drag operation in vertical direction. Vertical lines can be drawn. In the drawing mode, circle, ellipse,
Draw shapes such as rectangles and lines. An example is shown as a figure 33. In this drawing mode, circles, ellipses, rectangles,
After selecting a straight line or the like, it is possible to draw a figure of a desired size by adjusting the size by a drag operation. Further, in the handwriting line drawing mode, drawing is performed by connecting the drag loci sequentially with lines. FIG. 3 shows the handwritten line 34 drawn in the handwritten line mode. In the stamp drawing mode, the stamp image registered in advance is drawn at the touch point. A stamp 35 drawn in the stamp drawing mode is shown in FIG. In the text drawing mode, a font image corresponding to the character code input from the keyboard is drawn. The text 36 drawn in the text drawing mode is shown in FIG.

Next, referring to FIG. 4, a process of erasing a part of the drawn portion will be described. First, with the toolbar 31 displayed, the eraser button 37 in the toolbar 31 is selected. As a result, the CPU 21 writes the image data of the eraser cursor and the cursor rectangular area of the size selected in advance to the image RAM 24 to erase the eraser cursor 38 and the cursor rectangular area 3 on the screen.
Display 9. Then, with your finger, etc., eraser cursor 3
8 is dragged, and the coordinates of the locus of the eraser cursor 38 are sequentially acquired, and only the drawing portion of the drawing type selected in advance that is drawn in the moving cursor rectangular area 39 is deleted. The CPU 21
The drawing type (default drawing type) immediately after the drawing mode is selected is the drawing type to be drawn in that drawing mode. Figure 4
4 is an example in which “handwriting drawing” is selected as the drawing type. FIG. 4A shows a state before erasing, and FIG. 4B shows a state in which a part is erasing. FIG. 4B shows that the handwritten line 34 included in the cursor rectangular area 39 has disappeared but the figure 33a has not disappeared and remains.

Next, referring to FIG. 5, a method of setting the size of the cursor rectangular area 39 indicating the size of the eraser and the transition time from the partial erase to the surrounding erase by the eraser will be described. Note that the eraser is to erase the drawn image inside the rectangle, and in the system of this embodiment, when the eraser cursor is stopped at the same position for a predetermined time during partial erase with the eraser. Move to fence-out. The transition time is this predetermined time. To set such contents, the user first touches the setting button (see FIG. 4) in the toolbar 31. Then, the CPU 21 recognizes it and displays a dialog box for setting the partial eraser as shown in FIG. Then, when the user selects one of the eraser cursor sizes by touching one of the squares of various sizes indicating the size of the cursor rectangular area 39, the CPU 21 recognizes it and selects it. The size is stored as the size of the cursor rectangular area 39. Subsequently, the transition time from partial erasure to enclosure erasure is adjusted by the slider bar 40. The displayed frame 42 is touched, the touch time is measured by the timer 27, the transition time is determined according to the touch time, and the slide 41 is displayed at a position corresponding to the transition time. In addition, if it is set to "early" too much, if it is stopped for some reason during partial erasing, it will unintentionally shift to erasing. Also, if it is set too late, it will take too much time to move to the enclosure and it will be frustrating, so adjust it to an appropriate value.

Next, an eraser selection method will be described. In this embodiment, for example, when the handwriting line drawing mode is selected, the drawing type to be erased in the drawn image is automatically set to the handwriting line, and therefore the eraser function performed by touching the eraser button In the line drawing part, the part touched by the eraser cursor rectangular area is erased, and the all erase function performed by touching the erase all button erases all the handwritten line drawing part.
Similarly, when the ruled line drawing mode is selected, the eraser function erases the part of the ruled line drawing area touched by the eraser cursor rectangular area, and the all erase function erases all of the ruled line drawing part When the mode is selected, the eraser function erases the portion of the graphic drawing portion touched by the eraser cursor rectangular area, and the all erase function erases all the graphic drawing portion. In addition, when the stamp drawing mode is selected, the eraser function erases the part of the stamp drawing area touched by the eraser cursor rectangular area, and the erase all function erases all the stamp drawing area. When is selected, the eraser function erases the portion of the text drawing portion touched by the eraser cursor rectangular area, and the erase all function erases all the text drawing portion. In addition, in the partial erase mode in which the eraser function is selected, when a touch to the eraser button is further detected, as shown in FIG. 6A, a handwritten line, a figure, a ruled line, a stamp, or a text Displays a pull-down menu for selecting partial erase, and allows you to select the drawing type for partial erase regardless of the selected drawing mode. Further, when one drawing mode is selected and a touch to the erase button is detected when there is no drawing portion of the drawing type of that drawing mode, as shown in FIG. Displays a pull-down menu for selecting erase all of lines, figures, ruled lines, stamps, or text, and enables erase of the selected drawing type regardless of the selected drawing mode. Further, in the partial erase mode, when the touch stop operation reaches the transition time set as described above, the eraser cursor that has been displayed up to that point is erased and the mode is automatically shifted to the enclosure erase mode (Fig. 6 (c )). Then, in the erase mode, when a rectangular area is generated by dragging and detaching (when the hand is released from the screen), the drawing portion in the rectangular area is erased and automatically returned to the partial erase (FIG. 6 (c )).

Next, the operation flow of mode selection, drawing, and drawn image deletion will be described with reference to the operation flow charts shown in FIGS. As shown in FIG. 7, first, the reception of coordinate data from the coordinate detection unit is waited (No in S1 → S
1). Then, the coordinate detection unit detects a touch on the screen or the like, and the coordinate input interface 28 receives the coordinate data as shown in FIG. 10 (Yes in S1). In addition,
In FIG. 10, touch coordinates are coordinates of a position where a coordinate pointing object such as a finger touches the screen and the detection state is first changed from a non-detection state, and continuous coordinates are a drag position or a stop from after touch to before detachment. The coordinates of the position and the detached coordinates are the coordinates of the position where the coordinate pointing object cannot be detected (remote). When receiving such coordinate data, CP
U11 determines whether the coordinate data is touch coordinate data (S2), and if it is touch coordinate data (Yes in S2).
s), it is determined whether the coordinates are on the toolbar 31 (S3). If it is on the toolbar 31, (S
(Yes in 3), the touched button in the tool bar 31 is highlighted such as being displayed in black and white (S4). Further, the CPU 11 determines whether or not the touched button is the eraser button (S5), and if it is the eraser button (Yes in S5), the partial erase mode is already selected (Yes in S6), the erase button is erased. A pull-down menu for selecting a drawing type is displayed (S7) (see FIG. 6A). On the other hand, if the mode at that time is not the partial erase mode (No in S6), the partial erase mode of the selected drawing type (handwriting line drawing, ruled line drawing, graphic drawing, stamp drawing, or text drawing) is set. Yes (S8). On the other hand, if the touched button is not the eraser button (No in S5), it is determined whether the touched button is the all erase button (S9). If it is the all erase button (Yes in S9), if there is a drawn image of the selected drawing type (Yes in S10), all the drawing portions of the selected drawing type are deleted (S11).
For example, the image RAM 24 has an individual area associated with the screen for each drawing type and an overlapping area in which image data in each individual area is overlapped, and all bits of the individual area of the selected drawing type are, for example, “0”. Is written. On the other hand, when the all erase button is touched and there is no drawing of the selected drawing type (No in S10), a pull-down menu for selecting the drawing type to be erased is displayed (S12).

If it is determined in step S9 that the touched button is not the all erase button (S
No in 9), it is determined whether or not the touched button is the setting button (S13). If the touched button is the setting button (Yes in S13), the "Partial eraser setting" dialog box is displayed, the size of the cursor rectangular area of the eraser is selected, and the partial erase is switched to the eraser. Set the transition time when performing (S
14). On the other hand, if the touched button is not the setting button (No in S13), it means that the button for selecting the drawing mode has been touched. Therefore, the touched button shifts to the drawing mode (S15). Drawing is performed by the drawing type (handwriting line, ruled line, figure, stamp, text, etc.) of the drawing mode (S16). On the other hand, if it is determined in step S3 that the toolbar 31 is not touched (No in S3), if it is a touch in the drawing area (Yes in S17), the coordinates serving as the drawing start point are stored (stored). Yes (S18). If it is determined in step S2 that the received coordinate data is not the coordinate data of touch coordinates (No in S2), it is determined whether or not the coordinate data is continuous coordinate data (S19). If the coordinate data is continuous coordinate data (S19). Yes in S), the coordinates are within the drawing area (Yes in S20), and the operation is a drag operation (S2).
1 is Yes), it is determined whether or not the drawing mode (S2
2). Then, if it is the drawing mode (Yes in S22)
Drawing by the drawing type in the drawing mode is executed as described later (S23).

On the other hand, if it is determined in step S22 that the drawing mode is not set (No in S22),
If it is the partial erase mode (S24), if it is the partial erase mode (Yes in S24), it is determined whether the coordinate value is the same as the previously acquired coordinate value (S25). Yes) means that the timer is stopped, so that the timer 27 for measuring the stop time starts the time measurement if the time is not being measured, and if the time is being measured, it is determined whether or not the stop time has reached the transition time (S26). . Then, when the transition time is reached (Yes in S26), the mode is shifted to the erasing mode (S27). If it is determined in step S25 that the coordinates are not the same (No in S25), the drawing portion of the set drawing type in the eraser cursor rectangular area 39 is deleted (S28). On the other hand, if it is determined in step S24 that the mode is not the partial erase mode (No in S24), it is determined whether or not the mode is the erase mode (S29). If it is the erase mode, (Yes in S29).
s), a rectangular area indicating the erased area is displayed in association with the drag operation (S30). If it is determined in step S20 that the continuing coordinates are not in the drawing area (No in S20), it is determined whether the coordinates are in the pull-down menu (S31), and in the pull-down menu. If it is the coordinate (Yes in S31), the touched menu bar is highlighted (for example, highlighted) (S32). If it is determined in step S19 that the coordinate is not the continuous coordinate (No in S19), it is determined whether or not the coordinate is detached coordinate data (S33), the coordinate data is detached (Yes in S33), and the detached coordinate is pulled down. If in the menu, that is, if detached from the pull-down menu (Yes in S34),
The pull-down menu is deleted (S35). Then, if the pull-down menu at that time is a pull-down menu by touching the all erase button (Yes in S36), all the drawing portions of the drawing type selected in the all erase pull-down menu are deleted (S37). In addition, if it is not a pull-down menu by touching the all erase button (N in S36,
o), the mode is shifted to the partial erase mode of the drawing type selected in the partial erase pull-down menu (S38). On the other hand, if it is determined in step S34 that the detached coordinates are not in the pull-down menu (No in S34), the drawing mode is not in effect (No in S39), and the erase mode is in effect (Yes in S40). If it is the detach when the drag operation for generating the area is finished, the drawing portion of the drawing type set at that time in the generated rectangular area is erased (S41). Then, it returns from the erasing mode to the partially erasing mode (S42).

Thus, according to this embodiment, it is possible to efficiently erase only the drawing portion of the drawing type to be erased. Most of the eraser is needed for the drawing mode being operated at that time, but at that time, as the erasable drawing type, the drawing type of the drawing mode being drawn at that time (corresponding to the drawing mode The selected drawing type) is automatically selected, so that you can erase the drawn image at that time without selecting the drawing type regardless of whether it is partially erased, enclosed, or completely erased. Also, if you want to erase the drawn images of other drawing types, it is possible to display a pull-down menu. In addition, in the above description, when the mode is changed to the erasing mode, a cursor different from that in the partial erasing mode may be displayed. With such a configuration, since the mode change can be easily recognized, the delay for confirmation can be eliminated, and erroneous operation can be prevented, so that the efficiency of the drawing operation can be improved. Further, it is also possible to adopt a configuration in which the predetermined time for shifting from the partial erase mode to the enclosure mode can be entered and registered using the operation means. With such a configuration, the predetermined time can be adjusted according to the operation speed that differs depending on the individual, so that the efficiency of the drawing operation can be improved. In addition, the eraser mode is set as the initial setting (default setting) of the drawn image erasing mode. This is because the erased image is often erased in the eraser mode.

Next, the operation of the drawing control in step S23 will be described according to the operation flow shown in FIG. First, it is determined whether the handwriting line drawing mode is set (S5
1) In the handwritten line drawing mode (Yes in S51)
s), the position of the coordinate value received last time and the position of the coordinate value received this time are connected by, for example, a straight line to draw a line (S5).
2). On the other hand, if it is not the handwriting line drawing mode (No in S51), it is determined whether or not it is the ruled line drawing mode (S53), and if it is the ruled line drawing mode (Yes in S53).
s) If the ruled line direction has not been determined to be the horizontal direction or the vertical direction at the beginning of drawing the ruled line (No in S54), the X coordinate difference and the Y coordinate difference between the previously received coordinate value and the currently received coordinate value are calculated. Then, it is determined which of the X coordinate difference and the Y coordinate difference is larger (S55). If the X coordinate difference is larger, it is determined that the ruled line direction is the horizontal direction (Yes in S55), and the horizontal line is drawn (S5).
6). A horizontal line is drawn from the touch point to the X coordinate at that time with the Y coordinate fixed. If the Y coordinate difference is larger, it is determined that the ruled line direction is the vertical direction (No in S55), and vertical line drawing is performed (S57).
A vertical line is drawn from the touch point to the Y coordinate with the X coordinate fixed. After the ruled line direction is determined as described above (Yes in S54), if horizontal line drawing is performed (Yes in S58), the Y coordinate is fixed from the touch point to the X coordinate at that time and a horizontal line is drawn ( S59) If the drawing is a vertical line (No in S58), a vertical line is drawn from the touch point to the Y coordinate with the X coordinate fixed (S60).

On the other hand, if it is determined in step S53 that the mode is not the ruled line drawing mode (No in S53), it is determined whether or not it is the figure drawing mode (S61). If it is the figure drawing mode (Yes in S61), The selected figure (for example, circle, quadrangle, straight line, etc.) is enlarged or reduced according to the drag operation (S62). On the other hand, if it is not the graphic drawing mode (No in S61), it is determined whether or not it is the stamp drawing mode (S63). If it is the stamp drawing mode (Yes in S63), the set stamp image is touched. Copy it to the position of and display it (S
64). If it is not the stamp drawing mode (S63
No), it is determined whether or not the mode is the text drawing mode (S6).
5) In the text drawing mode (Yes in S65)
s), the cursor is moved to the touch coordinates (S66), and control such as character input and deletion using the keyboard is performed from the cursor position. Although one embodiment of the present invention has been described above in the case of the electronic blackboard system, the present invention can also be implemented in an information processing device such as a personal computer used in general usage. Further, instead of using the display device with coordinate input function, a mouse and a normal display device may be used.
In addition, a program programmed according to the method for erasing a drawn image as described above is stored in a storage medium that can be attached to and detached from a personal computer, and the storage medium can be used for information such as a personal computer that has not been able to erase a drawn image according to the present invention. By installing the program in a processing device or transferring such a program to such an information processing device via a network, the drawn image according to the present invention can be erased in the information processing device as well. .

[0022]

As described above, according to the present invention,
According to the invention of claim 1, when the eraser button being displayed is selected when the drawn image on the display screen is erased,
The eraser cursor is displayed, the eraser cursor moves according to the operation, the eraser cursor or the area attached to the eraser cursor is touching, and the drawing type or menu automatically selected in association with the drawing mode is displayed. Since only the drawing part of the drawing type selected from is erased, it is possible to efficiently delete only the drawing part of the drawing type to be erased. Most of the eraser is needed for the drawing mode being operated at that time, but at that time, the drawing type of the drawing mode being drawn at that time is automatically selected as the erasable drawing type. Therefore, the drawn image being drawn at that time can be erased without selecting the drawing type. In the invention according to claim 2, in the invention according to claim 1, when the all erase button is selected, the drawing type automatically selected in association with the drawing mode or the drawing type selected from the menu. Since all the drawn portions of are erased, the drawn image can be erased more efficiently. In the invention according to claim 3, in the invention according to claim 1 or 2, when the erase all button is selected, if there is no drawing portion of the selected drawing type, the drawing type is selected. The menu of is automatically displayed. For example, if you delete all the drawing images of the drawing type in the relevant drawing mode and then delete the drawing images of other drawing types, you can simply change the drawing mode at that time to another operation. It is possible to erase the drawn image of the drawing type in the all erase mode. According to the invention of claim 4, in the invention of claim 1,
When the eraser button is further selected in the eraser mode, a menu for selecting the drawing type is automatically displayed, so if you want to erase the drawn image of another drawing type, you can easily operate in the drawing mode at that time. With, it is possible to erase drawn images of other drawing types in the partial erase mode.

According to the invention of claim 5, claim 1
In the described invention, when the touch coordinates are stopped for a predetermined time or more in the partial erase mode, it automatically shifts to the erase mode in which the drawn image in the rectangular area generated according to the operation is erased, so that the enclosure can be easily enclosed. It is possible to shift to the erasing mode, and the efficiency of erasing the drawn image is further improved. In the invention of claim 6, in the invention of claim 5,
When the execution of the erasure is completed, the mode is automatically returned to the partial erasing mode, so that the operation for erasing, for example, a small portion of the unerased portion becomes simple. In the invention according to claim 7, in the invention according to claim 5, a cursor different from that in the partial erase mode is displayed when shifting to the erase mode, which facilitates the transition to the erase mode. Recognize. Further, in the invention described in claim 8, in the invention described in claim 5, since the predetermined time can be input and registered, the predetermined time suitable for each user can be set. In the invention according to claim 9, in the invention according to claim 1, claim 2, claim 3, or claim 5, since the drawing mode at that time is held, the drawn image is erased. You can easily continue the drawing you were doing. According to the invention of claim 10, claim 1
To a program programmed according to the drawn image erasing method according to any one of claims 1 to 9 even on an information processing device that has not been able to erase the drawn image according to any one of claims 1 to 9. Since it can be operated, such an information processing apparatus is also claimed.
It is possible to obtain the effects of the invention described in any one of claims 9 to 10. According to the invention of claim 11, the program of claim 10 can be stored in a removable storage medium.
When the information processing device is mounted on an information processing device such as a personal computer that cannot erase the drawn image according to the invention described in any one of claims 9 to 9, the information processing device also includes any one of claims 1 to 9. The effect of the invention described in item 1 can be obtained.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an electronic blackboard system showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part of a display device with a coordinate input function according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a drawn image erasing method showing an embodiment of the present invention.

FIG. 4 is another explanatory diagram of the drawn image erasing method showing the embodiment of the present invention.

FIG. 5 is another explanatory diagram of the drawn image erasing method according to the embodiment of the present invention.

FIG. 6 is another explanatory view of the drawn image erasing method showing the embodiment of the present invention.

FIG. 7 is an operation flow chart of a drawn image erasing method showing an embodiment of the present invention.

FIG. 8 is another operation flowchart of the drawn image erasing method according to the embodiment of the present invention.

FIG. 9 is another operational flowchart of the drawn image erasing method according to the embodiment of the present invention.

FIG. 10 is a data structure diagram relating to a drawn image erasing method showing an embodiment of the present invention.

FIG. 11 is another operation flowchart of the drawn image erasing method according to the embodiment of the present invention.

[Explanation of symbols]

1 Display device with coordinate input function 2 controller 11 Light emission detector 12 Light reflection film 13 screens 21 CPU 24 image RAM 27 timers 28 Coordinate input interface 29 Image output interface 31 Toolbar 37 Eraser button 38 Eraser cursor 39 Cursor rectangular area 40 slider bar 41 slides 42 frames

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) G09G 5/00 510 G09G 5/00 510H 5C082 530 530D 5E501 H04N 1/38 H04N 1/38 F term (reference) 2C071 CA02 CA04 CB06 CB10 DA03 DB02 DC04 5B050 AA10 BA18 BA20 CA07 DA09 FA13 5B068 AA05 AA15 AA21 BB20 BD17 CC16 CD05 5B087 AA10 AE02 CC33 CC34 DD09 DD10 DD17 DE07 5C076 CAA2 CA02 A22 CA022A02 BA24 CAA2 BA01 CA22 A24 AA16 AC50 BA05 CA01 CB05 CB06 EA01 EB17 FA02

Claims (11)

[Claims] 1. A method for erasing a drawn image on a display screen by using an eraser cursor, wherein when the displayed eraser button is selected, the eraser cursor is displayed and the eraser cursor is operated according to the operation. Move the eraser cursor or the area attached to the eraser cursor, and delete only the drawing type of the drawing type selected automatically from the menu or the drawing type automatically selected in association with the drawing mode. Characteristic drawing image erasing method. 2. The drawing image erasing method according to claim 1, wherein when the all erase button is selected, a drawing type of a drawing type automatically selected in association with the drawing mode or a drawing type selected from a menu is selected. A method for erasing a drawn image, which is characterized by erasing all. 3. The drawing image erasing method according to claim 1, wherein when the erase all button is selected and there is no drawing portion of the selected drawing type, a menu for selecting the drawing type is selected. A method for erasing a drawn image, characterized by automatically displaying. 4. The drawn image erasing method according to claim 1, wherein a menu for selecting a drawing type is automatically displayed when the eraser button is further selected in the eraser mode. Method. 5. The erase mode according to claim 1, wherein when the touch coordinates stop for a predetermined time or more in the partial erase mode, the drawn image in the rectangular area generated according to the operation is erased. A method for erasing a drawn image, characterized by automatically shifting to. 6. The drawn image erasing method according to claim 5, wherein when the execution of the erasure is completed, the drawn image erasing method is automatically returned to the partial erasing mode. 7. The drawn image erasing method according to claim 5, wherein a cursor different from that in the partial erasing mode is displayed when shifting to the erasing mode. 8. The drawn image erasing method according to claim 5, wherein the drawn image erasing method is configured such that the predetermined time can be input and registered. 9. The drawn image erasing method according to claim 1, claim 2, claim 3, or claim 5, wherein the drawing mode holds the drawing mode at that time. 10. A program operating on an information processing device, which is programmed according to the drawn image erasing method according to any one of claims 1 to 9. 11. A storage medium storing a program, wherein the program according to claim 10 is stored.