JP2007004330A - Portable information terminal and control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately restore image data in a portable information terminal without requiring complicated work.
In a mobile phone device, an image captured by an image data capturing unit 1 is recorded in a memory 4. The image data correction unit 7 reads an image from the memory 4 through the image data reading unit 5, and reads correction pattern data stored in the memory 4 through the correction pattern reading unit 6. Then, the image data correction unit 7 corrects the read image data with an algorithm specified by the read correction pattern data. The encrypted code reading unit 10 restores the corrected image data by reading it as an encrypted code, and outputs information (read result) obtained by the restoration to the display unit 11.
[Selection] Figure 1

Description

  The present invention relates to a portable information terminal and a control method thereof, and more particularly to a portable information terminal that can be restored by reading image data as an encrypted code and a control method thereof.

  2. Description of the Related Art Conventionally, a technique for reading data such as characters and numbers engraved on an object or paper as a graphic pattern by analyzing the image pattern has been used.

  In recent years, a technique using two-dimensional image data has been used in order to accurately mark a large amount of information as the image data as described above. In particular, a QR code (Quick Response code), which is a matrix type two-dimensional code in which the same number of small square points are arranged in the vertical and horizontal directions, is widely used because it is used for an address reading function of a cellular phone device. .

Various techniques have also been disclosed regarding the use of two-dimensional codes.
For example, Patent Document 1 discloses a technology that uses a two-dimensional code for communication between portable terminals. Specifically, in Patent Document 1, two-dimensional data generated by converting transmission data is displayed on a display unit of a transmission-side terminal, and the reception-side terminal displays the displayed two-dimensional data. A technique for receiving information transmitted from a transmission side by directly reading (without using a public communication network) is disclosed.

Further, in Patent Document 2, image information of a two-dimensional code is obtained by correcting the inclination of the image of a two-dimensional code photographed obliquely in a portable information terminal such as a cellular phone device in consideration of depth information. A technique for converting is disclosed.
JP 2004-147006 A JP 2004-54529 A

  As described above, when a two-dimensional code is read by a portable information terminal on the receiving side, the image data is often captured by photographing the image data of the two-dimensional code at the terminal. Note that image data captured by photographing or the like may be deteriorated with respect to stamped image data. Conventionally, when image data is deteriorated, in order to accurately restore the image data to the original data, the image data is moved to another terminal such as a personal computer and corrected, etc. The complicated work of processing was required.

  That is, the conventional form information terminal can restore the image data captured by reading the two-dimensional code to the original data, but in some cases, it is complicated to accurately restore the image data. I needed work.

  However, in recent years, a camera is often mounted on a portable information terminal, and the performance of the camera (particularly in terms of the number of pixels) is improved. For this reason, an image of a code generated for the purpose of being read by a portable information terminal has become fine. For this reason, it is considered that there is an increasing demand for accurate restoration of image data as described above.

  In addition, with the development of high-speed communication technology such as W-CDMA (Wideband Code Division Multiple Access), it is expected that the number of e-mails attached with images will increase in the future in mobile information terminals. The demand for accurate restoration of data is expected to increase.

  The present invention has been conceived in view of such circumstances, and an object of the present invention is to provide a portable information terminal capable of accurately restoring image data and a control method thereof without requiring complicated work.

  A portable information terminal according to the present invention includes an image data storage unit that stores image data, a correction pattern data storage unit that stores data relating to a correction pattern for the image data stored in the image data storage unit, and the image data A correction unit that corrects the image data stored in the storage unit with a correction pattern based on the data stored in the correction pattern data storage unit, and the image data corrected by the correction unit is read as an encryption code. And a restoration unit to restore by the above.

  In addition, the portable information terminal according to the present invention further includes an operation unit that receives input of information by being operated, the correction pattern data storage unit stores data relating to a plurality of correction patterns, and the correction unit includes: Based on information input to the operation unit, data related to one correction pattern is selected from data related to a plurality of correction patterns stored in the correction pattern data storage unit, and stored in the image data storage unit It is preferable to correct the image data.

  The portable information terminal according to the present invention further includes a determination unit that determines whether or not the restoration of the image data by the restoration unit is successful, and the correction pattern data storage unit stores data regarding a plurality of correction patterns. The correction unit selects one correction pattern from the data stored in the correction pattern data storage unit one by one until the determination unit determines that the restoration of the image data by the restoration unit is successful. It is preferable to correct the image data stored in the image data storage unit.

  The portable information terminal according to the present invention preferably further includes an image data acquisition unit that acquires image data via a network and stores the image data in the image data storage unit.

  The portable information terminal according to the present invention preferably further includes an image data generation unit that generates image data by taking an image and stores the image data in the image data storage unit.

  A portable information terminal control method according to the present invention is a portable information terminal control method including a memory for storing image data, and stores data related to a correction pattern for the image data stored in the image data storage unit. A step of correcting the image data stored in the image data storage unit with a correction pattern based on the stored data, and a step of restoring by reading the corrected image data as an encryption code It is characterized by including.

  According to the present invention, in the portable information terminal, the image data stored in the image data storage unit is restored after being corrected in the correction unit of the portable information terminal.

  Thereby, in the portable information terminal, it is possible to improve the recognition rate when data is restored from the image data without performing complicated processing such as moving the image data to another device.

  In particular, when the portable information terminal has a communication function, the image data of a two-dimensional barcode such as a QR code stored in the portable information terminal by receiving mail or browsing the WEB is restored with an easy operation. Will be.

  In addition, when the portable information terminal is equipped with a camera, image data stored in the portable information terminal can be restored by an easy operation by photographing a two-dimensional barcode such as a QR code. Become.

Hereinafter, a mobile phone device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram schematically showing a configuration of a mobile phone device.

  Referring to FIG. 1, a mobile phone device includes an image data capturing unit 1, an image processing control unit 2, a memory 4 that is a recording device, an operation unit 8 that accepts an external operation, and an LCD (Liquid Crystal). And a display unit 11 including a display).

  The image data reading unit 1 is a device for capturing image data from the outside of the mobile phone device, and may be composed of a camera that generates image data by taking an image, You may comprise from the interface for performing information communication with another apparatus by infrared communication etc.

  The image processing control unit 2 is a device for processing image data input from the image data capturing unit 1.

  The image data input to the image processing control unit 2 is first recorded in the memory 4 by the image data recording unit 3.

Note that a correction pattern is recorded in the memory 4.
The image data correction unit 7 causes the image data reading unit 5 to read the image data recorded in the memory 4 and causes the correction pattern reading unit 6 to read the correction pattern recorded in the memory 4. Then, the image data correction unit 7 can correct the image data using the correction pattern. The image data correction unit 7 can correct the image data by using correction data input by operating the operation unit 8. The operation unit 8 is constituted by a plurality of keys, for example.

  The image data reading unit 5 can also read the image data recorded in the memory 4 and display it on the display unit 11.

  The correction value data notification unit 9 outputs correction data input by operating the operation unit 8 to the image data correction unit 7.

The image data correction unit 7 inputs the corrected image data to the encryption code reading unit 10.
The encrypted code reading unit 10 restores the corrected image data by reading it as an encrypted code, and outputs information (read result) obtained by the restoration to the display unit 11.

FIG. 2 schematically shows a correction pattern recorded in the memory 4.
Referring to FIG. 2, the data of each correction pattern is recorded in association with a pattern number used for designating when it is read out.

  Specifically, for example, correction pattern data “0000 0001” is associated with pattern 1 of pattern number. The correction pattern data indicates an algorithm for performing monochrome correction.

  Further, the correction pattern data “0000 0010” is associated with the pattern 2 of the pattern number. This correction pattern data indicates an algorithm for performing sharp correction.

  In the memory 4, an address where each correction pattern such as “0x0101” is stored is stored in association with each pattern number.

  The correction pattern reading unit 6 can read the correction pattern data specified by the pattern number by designating the pattern number.

  Next, operations of the cellular phone device according to the present embodiment at the time of capturing image data and restoring the captured image data will be described.

  FIG. 3 is a flowchart of a process (restoration process) executed in the image processing control unit 2 at the time of taking in and restoring the image data. The image processing control unit 2 operates by pseudo multitask control by the microcontroller. The process according to the flowchart shown in FIG. 3 is started when an image to be corrected is designated and data related to the correction value of the image is input to the operation unit 8. .

  In step SA10, the correction value data notification unit 9 receives a signal generated when the user performs a key operation on the operation unit 8.

  Next, in step SA20, the correction value data notification unit 9 sends the signal received in step SA10 to the image data correction unit 7 as correction value data. The image data correction unit 7 stores the received data as correction value data. The correction value data is information for specifying correction pattern data such as a pattern number. In the image data correction unit 7, when each correction pattern data stored in the memory 4 is associated with each operation key provided in the operation unit 8, the correction value data notification unit 9 determines in step SA 20. Information about the operated key is transmitted to the image data correction unit 7.

  In step SA10, as a key operation on the operation unit 8, an operation may be performed in which the correction pattern data itself ("0000 0001" or the like) stored in the memory 4 is input. In such a case, the correction value data notifying unit 9 transmits the correction pattern data itself to the image data correcting unit 7. In such a case, the processes of Step SA30 and Step SA40 described later are omitted.

  In step SA30, the image data correction unit 7 outputs the correction value data received in step SA20 to the correction pattern reading unit 6, and the correction pattern reading unit 6 responds to the corresponding address ( (Pattern number shown in FIG. 2). The correction pattern reading unit 6 stores a correspondence relationship between correction value data and addresses.

  Next, in step SA40, the correction pattern reading unit 6 reads correction pattern data from the memory 4 based on the address obtained in step SA30. The correction pattern reading unit 6 sends the read correction pattern data to the image data correction unit 7.

  Next, in step SA50, the image data correction unit 7 corrects the image data using the correction pattern data sent from the correction pattern reading unit 6. Since the image to be corrected is designated in advance when the processing according to the flowchart shown in FIG. 3 is executed, the image data correction unit 7 converts the image data to be corrected into Before the process of step SA50, the image data is read from the memory 4 via the image data reading unit 5.

  In step SA50, the image data correction unit 7 corrects the image data using an algorithm specified by the correction pattern data from the correction pattern reading unit 6. Specifically, the correction is, for example, monochrome correction (a conversion algorithm from a color image to a monochrome image binary), sharp correction, or contour correction (contour), which is installed in general image processing system software or the like. Corrections that eliminate image blur are conceivable, such as unsharp masking (contrast adjustment that increases the difference in density from the surroundings at a certain ratio for each pixel). In addition, as to what algorithm the correction process itself is performed, since a known technique can be used, description thereof will not be repeated here.

  Next, in step SA60, the image data correction unit 7 transmits the corrected image data to the encrypted code reading unit 10 in order to analyze the code of the image data corrected in step SA50. As a result, the encrypted code reading unit 10 reads the received image data as a two-dimensional barcode.

  Next, in step SA70, the encrypted code reading unit 10 determines the display content of the display unit 11 according to the reading result in step SA60. Specifically, if the reading is successful, the encrypted code reading unit 10 causes the display unit 11 to display the content read in step SA80, that is, the content corresponding to the restored data obtained in the process of step SA60. The process is terminated.

  On the other hand, if the reading fails, the encrypted code reading unit 10 displays a message indicating that the reading has failed (for example, the screen 500 shown in FIG. 4) on the display unit 11 in step SA90, and then proceeds to step SA100. Is advanced. Note that the screen 500 is a screen for selecting either a “re-input” menu for designating another correction pattern data again or a “cancel” menu for canceling reading.

  In step S100, it is determined whether or not the “re-input” menu is selected on the screen 500. If it is determined that this is the case, the process returns to step SA10. Accordingly, the user can input another correction pattern to the operation unit 8 again based on the displayed content. On the other hand, if it is determined that the “Cancel” menu has been selected, the encrypted code reading unit 10 ends the process.

  FIG. 5 shows a process (automatic restoration) when image data is automatically corrected by a specific operation from the user in a state where the captured image data is displayed on the display unit 11 in the mobile phone device. It is a flowchart of a process. In this process, the image data is read from the memory 4 in advance by the image data reading unit 5 and displayed on the display unit 11. Further, the image data is corrected based on the correction pattern data.

  Referring to FIG. 5, when the user performs the specific operation described above with respect to operation unit 8, first, in step SB 10, image data correction unit 7 sends correction pattern data to correction pattern reading unit 6. An address (pattern number) for reading is initialized.

  Next, in step SB20, the image data correction unit 7 causes the correction pattern reading unit 6 to read correction pattern data. Thereby, the correction pattern reading unit 6 reads the correction pattern data corresponding to the address (pattern number) set at that time from the memory 4. The address set in the correction pattern reading unit 6 is initialized at step SB10 as described above, and is added at step SB90 as described later.

  Next, in step SB30, the image data correction unit 7 corrects the image data using the correction pattern data read by the correction pattern reading unit 6 in step SB20. Here, the image data to be corrected is image data displayed on the display unit 11 when this processing is executed, and is read from the memory 4 via the image data reading unit 5 in advance. Is. Further, the correction here uses an algorithm specified by correction pattern data. For example, a monochrome correction (from a color image to a monochrome image binary) generally installed in image processing system software or the like is used. Image blurring), sharpening correction, outline correction (to make the edges of the outline clear), unsharp mask (contrast adjustment that increases the difference in density from the surroundings at a certain ratio for each pixel), etc. It is a correction. In addition, as to what algorithm the correction process itself is performed, since a known technique can be used, description thereof will not be repeated here.

  When the correction is completed, the image data correction unit 7 sends the corrected image data to the encrypted code reading unit 10 for code analysis.

  Next, in step SB40, the encryption code reading unit 10 reads the image data as a two-dimensional barcode in order to restore the image data sent from the image data correction unit 7.

  In step SB50, the encrypted code reading unit 10 determines whether or not the restoration of the image data in step SB40 is successful, and if it is determined that it is successful, the read content in step SB60, that is, Then, the contents corresponding to the restoration data obtained by the code analysis in step SB40 are displayed on the display unit 11, and the process is terminated. On the other hand, if it is determined that the process has failed, the process proceeds to step SB70.

  In step SB70, the image data correction unit 7 determines whether or not the address currently set in the correction pattern reading unit 6 is an address corresponding to the last correction pattern data stored in the memory 4, that is, FIG. It is determined whether or not the table as shown in FIG. 2 ends at the address currently set by the correction pattern reading unit 6. If it is determined that the currently set address in the correction pattern reading unit 6 is the address corresponding to the last correction pattern data in the memory 4, the process proceeds to step SB80. If not, the process proceeds to step SB90. Then, the address set in the correction pattern reading unit 6 is added so as to read the next correction pattern data in the memory 4, and the process returns to step SB20.

  In step SB80, the encrypted code reading unit 10 displays on the display unit 11 that the reading has failed (displays a message or the like) and ends the process.

  According to the present embodiment described above, in the mobile phone device that is an example of the mobile information terminal, the image data generated by reading the image is restored after the image data is corrected. Thereby, in the portable information terminal, it is possible to improve the recognition rate when data is restored from the image data without performing complicated processing such as moving the image data to another device.

  In the present embodiment described above, what correction is performed regarding the correction of image data, specifically, which of a plurality of correction pattern data stored in the memory 4 is used for correction. Whether to do this may be determined based on information input as a correction value by the user as described with reference to FIG. 3, or as described with reference to FIG. 5, the image processing control unit 2. May be determined in the order stored in the memory 4.

  According to the present embodiment, by correcting the image data, for example, image data corresponding to the QR code image 100 as shown in FIG. 6A becomes an image 200 as shown in FIG. The corresponding image data is corrected. Further, an image in the region 101 that is a part of the image 100 is shown in FIG. 7A, and an image in the region 201 that is a part of the image 200 is shown in an enlarged manner in FIG. ing. As can be understood from FIGS. 6 and 7, the image data is corrected so that the outline is enhanced by the correction in the present embodiment. Then, by correcting the image data to be restored in this way, the image data that has been difficult to restore is made image data that can be restored.

  In the present invention, the image data used for restoration may be data generated by, for example, a portable information terminal including a camera and capturing an image with the camera.

  However, the image data used for restoration in the present invention is not limited to that generated in the portable information terminal. For example, the mobile information terminal may be configured to be connectable to a network, and may be image data obtained via the network such as WEB access or mail reception.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows schematically the structure of the mobile telephone apparatus which is one embodiment of this invention. It is a figure which shows typically the correction pattern recorded on the memory of FIG. It is a flowchart of the decompression | restoration process performed in the mobile telephone apparatus of FIG. It is a figure which shows an example of the display screen of the display part of the mobile telephone apparatus of FIG. 3 is a flowchart of automatic restoration processing executed in the mobile phone device of FIG. 1. (A) is a figure which shows the image before correction | amendment in the mobile telephone apparatus of FIG. 1, (B) is a figure which shows the image after correction | amendment. (A) is a partially enlarged view of the image of FIG. 6 (A), and (B) is a partially enlarged view of the image of FIG. 6 (B).

Explanation of symbols

1 image data capturing unit, 2 image processing control unit, 3 image data recording unit, 4 memory, 5
Image data reading unit, 6 correction pattern reading unit, 7 image data correcting unit, 8 operation unit, 9
Correction value data notification unit, 10 encrypted code reading unit, 11 display unit.

Claims (6)

An image data storage unit for storing image data;
A correction pattern data storage unit for storing data relating to a correction pattern for the image data stored in the image data storage unit;
A correction unit that corrects the image data stored in the image data storage unit with a correction pattern based on the data stored in the correction pattern data storage unit;
A portable information terminal comprising: a restoration unit that restores the image data corrected by the correction unit by reading it as an encrypted code. It further includes an operation unit that receives input of information by being operated,
The correction pattern data storage unit stores data relating to a plurality of correction patterns,
The correction unit selects data related to one correction pattern from data related to a plurality of correction patterns stored in the correction pattern data storage unit based on information input to the operation unit, and the image data storage unit The portable information terminal according to claim 1, wherein the image data stored in is corrected. A judgment unit for judging whether the restoration of the image data by the restoration unit is successful,
The correction pattern data storage unit stores data relating to a plurality of correction patterns,
The correction unit selects correction patterns one by one from the data stored in the correction pattern data storage unit until the determination unit determines that the restoration of the image data by the restoration unit is successful, and The portable information terminal according to claim 1, wherein the image data stored in the image data storage unit is corrected.   The portable information terminal according to claim 1, further comprising an image data acquisition unit that acquires image data via a network and stores the image data in the image data storage unit.   The portable information terminal according to claim 1, further comprising an image data generation unit that generates image data by capturing an image and stores the image data in the image data storage unit. A method for controlling a portable information terminal including an image data storage unit for storing image data,
Storing data relating to a correction pattern for the image data stored in the image data storage unit;
Correcting the image data stored in the image data storage unit with a correction pattern based on the stored data;
And a step of restoring the corrected image data by reading it as an encrypted code.