JP2014052901A - Character recognition device, method for controlling character recognition device, character recognition device control program and computer readable recording medium with the program recorded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable character recognition while maintaining a charging state by a non-contact charging system.SOLUTION: A character recognition device includes a camera switching part (24) for switching a camera for photographing from an out-camera part (21) to an in-camera part (22) in the case that the device cannot move and that characters are not included in an image photographed by the out-camera part (21), and a character recognition part (31) for recognizing a character included in an image photographed by the in-camera part (22).

Description

  The present invention relates to a character recognition device capable of recognizing characters from a photographed image, a method for controlling the character recognition device, a character recognition device control program, and a computer-readable recording medium on which the program is recorded.

  In recent years, portable information terminals are rapidly spreading. Some information terminals include a camera and can recognize characters included in a photographed image. In order to use such an information terminal, it is necessary to charge it, but it is troublesome if the information terminal and the charger must be electrically connected each time the information terminal is charged.

  Accordingly, attention has been focused on a non-contact charging method (charging by non-contact power transmission) in which charging is performed in a non-contact manner without having a metal contact as a charger for an information terminal. As the non-contact charging method, an electromagnetic induction method and an electric field coupling method are mainly used. The electromagnetic induction method is a method in which a primary coil provided in a charger and a secondary coil provided in an information terminal that is a device to be charged are magnetically coupled, and non-magnetic from the primary coil side to the secondary coil side by electromagnetic induction. In this method, electric power is transmitted by contact and charged.

  In addition, the electric field coupling method is a method in which electrodes are provided on each of the charger on the power transmission side and the information terminal on the power reception side, and electric power is transmitted using the “electric field” generated when both electrodes are close to each other. It is.

  Further, there is a technique described in Patent Document 1 regarding control in a device that is being charged. Patent Document 1 describes a wireless receiver that does not output vibration when a signal is received during charging, regardless of whether or not vibration output is set.

  As a result, it is possible to prevent unpleasant noise from being generated by receiving the signal during charging and vibrating the receiver, or the receiver may be detached from the charging adapter due to vibration, or the receiver may be dropped and damaged. It prevents you from getting stuck.

Japanese Patent Laid-Open No. 2001-19764 (published July 19, 2001)

  As described above, there is a technology for recognizing characters included in a captured image in a portable information terminal with a camera. However, when charging with the above-mentioned contactless charging method, the camera part of the portable information terminal is often placed with the charger side, and the character to be recognized is photographed while maintaining the charged state. It cannot be recognized.

  In addition, the technique described in Patent Document 1 turns off the vibration output during charging, and does not mention imaging of images or character recognition during charging.

  The present invention has been made in view of the above problems, and an object of the present invention is to realize a character recognition device and the like that can perform character recognition while maintaining a charged state by a non-contact charging method.

  In order to solve the above problems, a character recognition device according to the present invention includes a plurality of cameras, and the character recognition device recognizes characters included in an image photographed by any of the plurality of cameras. A movement determination unit for determining whether or not the character is possible; a character determination unit for determining whether or not a character is included in an image captured by a first camera that is one of the plurality of cameras; When the character determination means determines that the image captured by the first camera contains a character, the character recognition means for recognizing the included character and the movement availability determination means If it is determined that the character cannot be moved, and the character determination unit determines that the image captured by the first camera does not include a character, a second camera different from the first camera is used. Camera switching means for switching to a camera, wherein the character recognition means is an image photographed by the second camera when the camera switching means switches the camera to be photographed from the first camera to the second camera. It is characterized by recognizing the characters contained in.

  A control method for a character recognition device according to the present invention is a control method for a character recognition device that includes a plurality of cameras and recognizes characters included in an image captured by any of the plurality of cameras. And a character determination step for determining whether or not a character is included in an image photographed by a first camera that is one of the plurality of cameras. If it is determined that the device cannot be moved in the movement allowance determination step and the character determination step determines that no character is included in the image captured by the first camera, A camera switching step of switching the camera to be switched to a second camera different from the first camera, and the camera switching step from the first camera to the second camera in the camera switching step. When switched to, it is characterized in that it comprises a character recognition step for recognizing characters included in the image captured by the second camera.

  According to one aspect of the present invention, character recognition is performed using an image photographed by the second camera even when the device cannot move and characters cannot be recognized from the image photographed by the first camera. There is an effect that can be.

  For example, even when the device is in a charged state by non-contact charging, the device cannot move, and cannot be photographed by the first camera, photographing and character recognition can be performed by the second camera. There is an effect. Therefore, there is an effect that the character recognition can be made possible while maintaining the charging state by the non-contact charging method.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1, showing an embodiment of the present invention, is a block diagram showing a main configuration of a portable information terminal. It is a figure which shows the external appearance of the said portable information terminal, (a) is the figure which looked at the portable information terminal from the display input part side, (b) was the figure which looked at the portable information terminal from the opposite side to the display input part. (C) is a figure which shows the state in which the portable information terminal is mounted in the non-contact charger. It is a flowchart which shows the flow of the character recognition process in the said portable information terminal. It is a figure which shows the example of a screen when performing a character recognition process in the said portable information terminal. It is a figure which shows the example of a screen when the camera which image | photographs is switched while charging the said portable information terminal, (a) is a figure which shows the state which cannot recognize a character during imaging | photography with the out camera part 21, (b ) Is a diagram illustrating an example of a screen when the camera to be photographed is switched from the out-camera unit 21 to the in-camera unit 22, and (c) is an example of a screen when characters cannot be recognized after switching to the in-camera unit 22. FIG. It is a figure which shows the example of a screen when receiving a character input manually in the said portable information terminal.

〔Overview〕
The following describes one embodiment of the present invention with reference to FIGS. The portable information terminal 1 according to the present embodiment includes an out-camera unit 21 and an in-camera unit 22 and recognizes characters included in an image captured by the camera. The portable information terminal 1 is a device that can be charged by non-contact power transmission (hereinafter also referred to as non-contact charging). Switching to shooting by the camera unit 22 is performed to capture an image and recognize characters.

  The appearance of the portable information terminal 1 is shown in FIG. FIG. 2A is a diagram of the portable information terminal 1 viewed from the display input unit 11 side. As shown in FIG. 2A, the portable information terminal 1 includes an in-camera unit 22 on the same side as the display input unit 11. FIG. 2B is a diagram of the portable information terminal 1 viewed from the side opposite to the display input unit 11. As shown in FIG. 2B, an out camera unit 21 is provided on the surface of the portable information terminal 1 opposite to the display input unit 11. As described above, the out-camera unit 21 is provided on the surface opposite to the display input unit 11, so that when the out-camera unit 21 performs shooting, the shooting target can be displayed on the display input unit 11. it can.

  FIG. 2C shows a state where the portable information terminal 1 is placed on the non-contact charger 2. As shown in FIG. 2C, when the portable information terminal 1 is being charged, it is difficult to take a picture with the out-camera unit 21. In such a case, in the present embodiment, the camera that can be photographed is switched from the out-camera unit 21 to the in-camera unit 22 to enable photographing and recognize characters included in the photographed image. Thereby, according to the portable information terminal 1 which concerns on this Embodiment, even if it is during non-contact charge, character recognition can be performed from the image | photographed image.

  Note that the present invention can be applied to all electronic devices including a plurality of cameras and capable of character recognition processing. For example, the present invention is applied to portable electronic devices such as a mobile phone, a portable personal computer, and a handy terminal. Is preferred.

[Configuration of portable information terminal 1]
Next, the principal part structure of the portable information terminal 1 is demonstrated with reference to FIG. FIG. 1 is a block diagram showing a main configuration of the portable information terminal 1. As shown in FIG. 1, the portable information terminal 1 includes a control unit 10, a display input unit 11, a camera unit 12, a non-contact charging circuit 13, a rechargeable battery 14, a storage unit 15, a voice input / output unit 16, an operation unit 17, And a power supply circuit 18.

  The display input unit 11 includes a display capable of displaying information and a touch panel integrated with the display. Thereby, the display of information and the input by the contact with respect to the display input part 11 are attained. The display can be composed of, for example, an LCD (Liquid Crystal Display), an EL (Electro Luminescence), or the like.

  The camera unit 12 includes an out-camera unit 21 and an in-camera unit 22, and a digital camera including, for example, a lens group, a diaphragm, an image sensor, and the like is mounted therein. Examples of the image sensor include a charge coupled device (CCD) and a complementary metal-oxide semiconductor (CMOS) image sensor. The camera unit 12 captures a captured image, converts the captured image data into the captured image data, and transmits the captured image data to the display / character recognition control unit 23.

  Further, the out-camera unit 21 and the in-camera unit 22 are provided at positions where the shooting directions are opposite to each other by 180 degrees (see FIGS. 2A and 2B).

  The non-contact charging circuit 13 is a circuit that transmits power from the non-contact charger 2 by non-contact power transmission. Then, the rechargeable battery 14 is charged by supplying the transmitted power to the rechargeable battery 14. The rechargeable battery 14 is a battery that supplies power for operating the portable information terminal 1.

  The storage unit 15 stores character recognition processing data 27 used by the character recognition unit 31 (described later) for performing character recognition processing, various programs for operating the portable information terminal 1, various application programs, and the like. It is a storage unit.

  The voice input / output unit 16 inputs and outputs voice, and includes, for example, a speaker and a microphone.

  The operation unit 17 receives an operation on the portable information terminal 1 and is, for example, a power button.

  The power supply circuit 18 is a circuit for operating the portable information terminal 1 with the power supplied from the rechargeable battery 14.

  The control unit 10 executes various processes in the portable information terminal 1 and includes a display / character recognition control unit 23, a camera switching unit 24, a charge detection unit 25, and a battery voltage detection unit 26.

  The display / character recognition control unit 23 determines whether or not a character is included in the image captured by the camera unit 12 and, when the character is included, a specified range among the included characters The character recognition process for recognizing the character is performed. In addition, the display / character recognition control unit 23 causes the display input unit 11 to display an image or the like taken by the camera unit 12. The display / character recognition control unit 23 includes a character recognition unit 31 and a character recognition switching unit 32.

  The character recognition unit 31 performs character recognition processing included in the image captured by the camera unit 12 using the character recognition processing data 27. The character recognition process can be performed using a known technique such as OCR (Optical Character Recognition), and the description thereof is omitted.

  The character recognition switching unit 32 switches character recognition processing from characters included in an image captured using the camera unit 12 to characters input by handwriting by the user.

  When the display / character recognition control unit 23 determines that the image captured by the out camera unit 21 does not include characters, the camera switching unit 24 changes the camera to be captured from the out camera unit 21 to the in camera unit 22. Is switched to.

  The charge detection unit 25 detects that the portable information terminal 1 is in non-contact charging by detecting whether or not the non-contact charging circuit 13 receives power transmission from the non-contact charger 2.

  The battery voltage detector 26 detects the state of charge of the rechargeable battery 14 (the degree of charge, the completion of charge). In addition, the battery voltage detection unit 26 calculates the remaining time required until the rechargeable battery 14 is fully charged from the detected charging state of the rechargeable battery 14, and calculates the operation time that is possible with the detected degree of charge. It is displayed on the display input unit 11.

[Character recognition processing flow in portable information terminal 1]
A flow of processing for performing character recognition processing in the portable information terminal 1 during charging by non-contact charging will be described with reference to FIGS. FIG. 3 is a flowchart showing a flow of processing when performing character recognition processing in the portable information terminal 1.

  First, in the portable information terminal 1, a character recognition mode is started when a character recognition application or the like is activated (S1). When the character recognition mode starts, the display / character recognition control unit 23 determines whether or not the portable information terminal 1 is in contactless charging depending on whether or not the charge detection unit 25 detects that contactless charging is in progress. Is determined (S2). If the portable information terminal 1 is not in contactless charging (NO in S2), the display / character recognition control unit 23 enables the out camera unit 21 (S3), and in the captured image captured by the out camera unit 21 Upon selection of a range for character recognition (S4), character recognition processing is performed for the selected range (S5). When the character recognition processing is completed, the character recognition mode is terminated (S6), and the out camera unit 21 is disabled. In step S7, the process returns to step S1.

  In addition, the process which determines whether it is in charge in step S2 may determine whether it is not only whether it is charging, and the charge degree is over the predetermined value. That is, when the charging degree is equal to or less than a predetermined value, it is determined that charging is being performed, and when the charging degree exceeds a predetermined value, it is determined that charging is not being performed.

  For example, assuming that the charging level is 50%, if the charging level of the rechargeable battery 14 detected by the battery voltage detection unit 26 exceeds 50%, the process proceeds to a process that determines that charging is not being performed, and is 50% or less. In the case of, the process proceeds to the process determined to be charging.

  Thereby, even when the degree of charge is not 100%, necessary processing can be performed, and appropriate control can be performed according to the remaining capacity of the battery.

  An example of selecting a range in which character recognition is performed from a captured image captured by the out-camera unit 21 and displayed on the display input unit 11 will be described with reference to FIG. FIG. 4 shows a state in which a captured image is displayed on the display input unit 11. In this state, by accepting a range in which character recognition is desired, character recognition processing for the accepted range is performed. FIG. 4 shows a range selected in parentheses. The range may be specified by touching the display input unit 11 or by operating the position of the parenthesis with a cross key or the like.

  On the other hand, if it is determined in step S2 that contactless charging is being performed (YES in S2), the display / character recognition control unit 23 enables the out-camera unit 21 (S10) and the image is taken by the out-camera unit 21. Character recognition is performed on the image (captured image) (S11), and it is determined whether or not the captured image includes a character (S12). If the photographed image includes characters (YES in S12), the process proceeds to step S4. If the photographed image contains no characters (NO in S12), the display input unit 11 displays that the photographed image contains no characters (S13), and the camera switching unit 24 selects the camera to be photographed. The out camera unit 21 is switched to the in camera unit 22 (S14). FIG. 5A shows an example of a display screen when characters are not included in the captured image in step S13. As shown in FIG. 5A, when a character is not included in the photographed image, a display such as “character is not recognized” is displayed on the display input unit 11. When the camera to be photographed is switched in step S14, a display indicating that the camera to be photographed has been switched is displayed as shown in FIG.

  After the camera to be photographed is switched to the in-camera unit 22 and a predetermined time has elapsed (YES in S15), the display / character recognition control unit 23 performs character recognition on the image (captured image) photographed by the in-camera unit 22. (S16) It is determined whether or not characters are included in the captured image (S17).

  If characters are included in the captured image (YES in S17), selection of a range for character recognition in the captured image captured by the in-camera unit 22 is accepted (S18), and character recognition is performed for the selected range. The process is performed (S19). When the character recognition process is completed, the character recognition mode is terminated (S20), the in-camera unit 22 is disabled (S21), and the process returns to step S1.

  If it is determined in step S17 that the photographed image does not include characters (NO in S17), the display / character recognition control unit 23 informs the display input unit 11 that the photographed image does not include characters. It is displayed (S30). An example of the display screen at this time is shown in FIG. As shown in FIG. 5C, when the photographed image does not include characters, a display such as “character is not recognized” is displayed.

  And the character recognition switching part 32 switches from the mode which recognizes a character from a picked-up image to the mode (handwriting input mode) which recognizes the character input by handwriting (S31). A screen display example in the handwriting input mode is shown in FIG. As shown in FIG. 6, in the handwriting input mode, a handwriting input area 61 is displayed, and the character recognition unit 31 performs character recognition processing on the characters described in the handwriting input area 61.

  After switching to the handwriting input mode, the display / character recognition control unit 23 invalidates the in-camera unit 22 (S32), and when the character recognition unit 31 detects that handwriting input is performed in the handwriting input area 61 (YES in S33). The handwritten character is displayed on the display input unit 11 (S34), and when the input character is confirmed (YES in S35), the input character is recognized (S36). Then, the character recognition mode is terminated (S37).

[Summary]
As described above, the character recognition device according to the present invention includes a plurality of cameras, and the character recognition device that recognizes characters included in an image captured by any of the plurality of cameras can move itself. A motion determination unit for determining whether there is a character, a character determination unit for determining whether a character is included in an image captured by any of the plurality of cameras, and the character determination unit. If it is determined that a character is included in the image, the character recognition means for recognizing the included character and the movement availability determination means determine that the device cannot move, and the character determination When the means determines that the image captured by the first camera that is one of the plurality of cameras does not include characters, the camera that captures the image is switched to a second camera different from the first camera. Camera switching means, and when the camera switching means switches the camera to be photographed from the first camera to the second camera, the character determination means includes a character in an image photographed by the second camera. If the character is included, the character recognizing means recognizes the character included in the image taken by the second camera.

  A control method for a character recognition device according to the present invention is a control method for a character recognition device that includes a plurality of cameras and recognizes characters included in an image captured by any of the plurality of cameras. A character determination step for determining whether or not a character can be moved, and a character determination for determining whether or not a character is included in an image photographed by a first camera that is one of the plurality of cameras. If it is determined that the device cannot be moved in the step and the movement determination step, and the character determination step determines that the image captured by the first camera does not include a character, A camera switching step for switching a camera to be photographed to a second camera different from the first camera, and a camera for photographing in the camera switching step from the first camera to the second camera. When switching to (3), it is determined whether or not the image captured by the second camera includes characters, and if the character is included, the characters included in the image captured by the second camera are recognized. And a character recognition step.

  According to the above configuration or method, when a character is included in the image captured by the first camera, the character is recognized, and the image captured by the first camera does not include the character. If the device cannot move, the camera to be photographed is switched from the first camera to the second camera, and characters included in the image photographed by the second camera are recognized.

  As a result, even if the apparatus cannot move and characters cannot be recognized from the image captured by the first camera, the character recognition can be performed by the image captured by the second camera.

  For example, even when the device is in a charged state by non-contact charging, the device cannot move, and cannot be photographed by the first camera, photographing and character recognition can be performed by the second camera. . Therefore, character recognition can be made possible while maintaining the state of charge by the non-contact charging method.

  The character recognition device according to the present invention includes a battery unit that is charged by non-contact power transmission, and a charging determination unit that determines whether or not the battery unit is being charged. When the charging determination unit determines that charging is in progress, it may be determined that the device itself cannot be moved.

  According to said structure, when charging by non-contact electric power transmission, when charging by non-contact electric power transmission, it determines with the own terminal being unable to move. Thereby, the case where the own terminal cannot move can be determined clearly.

  In the character recognition device according to the present invention, when the charging determination unit determines that the charging is completed, the movement availability determination unit may determine that the own device can be moved.

  According to said structure, since it determines with a self-terminal being able to move after completion of charge, it can prevent continuing using a 2nd camera after completion of charge.

  In the character recognition device according to the present invention, the character determination means determines whether or not a character is included in the image captured by the second camera, and the character determination means captures the image by the second camera. When it is determined that no character is included in the image, a manual input unit that manually receives a recognized character from the user may be provided.

  According to said structure, when a character cannot be recognized also from the image image | photographed with the 2nd camera, a character input is received manually from a user. Thereby, even if it is a case where character recognition cannot be performed from an image, character input can be performed.

  In the character recognition device according to the present invention, the first camera and the second camera may be provided at positions where the shooting directions are opposite to each other by 180 degrees.

  According to said structure, a 1st camera and a 2nd camera are provided in the position where an imaging | photography direction is a 180 degree opposite side. For example, when non-contact charging is being performed and no characters are included in an image captured by the first camera, there is a high possibility that the first camera faces the charging stand. In this configuration, since the second camera is provided at a position where the shooting direction is opposite to the first camera by 180 degrees, in such a case, an image can be reliably shot with the second camera.

  The character recognition device may be realized by a computer. In this case, a control program for the character recognition device that causes the character recognition device to be realized by the computer by causing the computer to operate as the respective means, and A computer-readable recording medium on which is recorded also falls within the scope of the present invention.

[Configuration by software]
Finally, each block of the portable information terminal 1, particularly the control unit 10 (display / character recognition control unit 23, camera switching unit 24, charge detection unit 25, battery voltage detection unit 26, character recognition unit 31, character recognition switching unit 32. ) May be realized in hardware by a logic circuit formed on an integrated circuit (IC chip), or may be realized in software using a CPU (central processing unit).

  In the latter case, the portable information terminal 1 includes a CPU that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, a RAM (random access memory) that expands the program, and the program And a storage device (recording medium) such as a memory for storing various data. An object of the present invention is to provide a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the portable information terminal 1 which is software for realizing the above-described functions is recorded so as to be readable by a computer. This can also be achieved by supplying the portable information terminal 1 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU (micro processing unit)).

  Examples of the recording medium include tapes such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, a CD-ROM (compact disc read-only memory) / MO (magneto-optical) / Disks including optical discs such as MD (Mini Disc) / DVD (digital versatile disk) / CD-R (CD Recordable), cards such as IC cards (including memory cards) / optical cards, mask ROM / EPROM (erasable) Programmable read-only memory (EEPROM) (registered trademark) (electrically erasable and programmable read-only memory) / semiconductor memories such as flash ROM, or logic circuits such as PLD (Programmable logic device) and FPGA (Field Programmable Gate Array) Etc. can be used.

  Further, the portable information terminal 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited as long as it can transmit the program code. For example, the Internet, intranet, extranet, LAN (local area network), ISDN (integrated services digital network), VAN (value-added network), CATV (community antenna television) communication network, virtual private network (virtual private network), A telephone line network, a mobile communication network, a satellite communication network, etc. can be used. The transmission medium constituting the communication network may be any medium that can transmit the program code, and is not limited to a specific configuration or type. For example, infrared data such as IrDA (infrared data association) or remote control can be used for wired such as IEEE (institute of electrical and electronic engineers) 1394, USB, power line carrier, cable TV line, telephone line, ADSL (asynchronous digital subscriber loop) line, etc. , Bluetooth (registered trademark), IEEE 802.11 wireless, HDR (high data rate), NFC (Near Field Communication), DLNA (Digital Living Network Alliance), mobile phone network, satellite line, terrestrial digital network, etc. Is possible. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  Even in a state where a device with a plurality of cameras cannot move its own device and any of the cameras cannot be used, processing using the captured image can be performed by using an effective camera. Since it can be performed, it is suitable for a device including a plurality of cameras.

1 Mobile information terminal (character recognition device)
2 Non-contact charger 10 Control unit 11 Display input unit 12 Camera unit 13 Non-contact charging circuit 14 Rechargeable battery (battery unit)
DESCRIPTION OF SYMBOLS 15 Memory | storage part 16 Audio | voice input / output part 17 Operation part 18 Power supply circuit 21 Out camera part (1st camera)
22 In-camera part (second camera)
23 Display / Character Recognition Control Unit (Moveability determination means, charging determination means)
24 Camera switching unit (camera switching means)
25 Charging detection unit 26 Battery voltage detection unit 27 Character recognition processing data 31 Character recognition unit (character determination unit, character recognition unit)
32 Character recognition switching part

Claims (8)

In a character recognition device comprising a plurality of cameras and recognizing characters included in an image taken by any of the plurality of cameras,
A movement availability determination means for determining whether or not the own apparatus can move;
Character determination means for determining whether or not a character is included in an image photographed by any of the plurality of cameras;
A character recognizing unit for recognizing the included character when the character determining unit determines that the captured image includes a character;
The movement determination unit determines that the device cannot move, and the character determination unit includes a character in an image taken by a first camera that is one of the plurality of cameras. Camera switching means for switching the camera to be photographed to a second camera different from the first camera when it is determined that the camera is not,
When the camera switching means switches the camera to be photographed from the first camera to the second camera, the character determination means determines whether or not characters are included in the image photographed by the second camera. When a character is included, the character recognition means recognizes a character included in an image taken by the second camera. A battery unit charged by contactless power transmission;
And a charging determination means for determining whether or not the battery unit is being charged,
The character recognition device according to claim 1, wherein the movement availability determination unit determines that the device itself cannot be moved when the charging determination unit determines that charging is in progress.   The character recognition device according to claim 2, wherein when the charging determination unit determines that the charging is completed, the movement availability determination unit determines that the device can move. The character determination means is for determining whether or not a character is included in an image photographed by the second camera.
2. The manual input means for manually receiving a recognized character from a user when the character determination means determines that the image taken by the second camera does not include a character. 2. The character recognition device according to 2.   The character recognition device according to any one of claims 1 to 4, wherein the first camera and the second camera are provided at positions where the shooting directions are opposite to each other by 180 degrees. .   A character recognition device control program for operating the character recognition device according to any one of claims 1 to 5, wherein the computer functions as the above-described means.   The computer-readable recording medium which recorded the character recognition apparatus control program of Claim 6. A control method of a character recognition device comprising a plurality of cameras and recognizing characters included in an image taken by any of the plurality of cameras,
A movement availability determination step for determining whether or not the own apparatus can be moved;
A character determination step for determining whether or not a character is included in an image photographed by a first camera which is one of the plurality of cameras;
If it is determined that the device cannot be moved in the movement determination step, and the character determination step determines that no character is included in the image captured by the first camera, the camera that captures the image A camera switching step for switching to a second camera different from the first camera;
When the camera photographed in the camera switching step is switched from the first camera to the second camera, it is determined whether or not characters are included in the image photographed by the second camera, and characters are included. A character recognition step for recognizing characters included in the image taken by the second camera.

Images