JP2004005535A - Character display device, its control method, recording medium and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a character to further easily to see even when digitally magnifying the character included in a pickup image. <P>SOLUTION: When a mode setting switch 143 is set in a "character display mode", a character recognizing processing part 20 recognizes the character from digital image data stored in a frame buffer 13 on the basis of character pattern information stored in a character information file 21, and stores the character expressed by an outline font corresponding to this recognized character in a character recognizing buffer 22. A control part 15 stores the digital image data including a partial character among a character group stored in the character recognizing buffer 22 in a VRAM 18, and displays the digital image data stored in the VRAM 18 on an LCD 19 arranged on a back face of a digital camera 1. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a character display device, a control method thereof, a recording medium, and a program, and more particularly to a technique for enlarging and displaying an imaged character in a portable information device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a loupe (magnifying glass) has been generally used to enlarge characters so that small characters such as newspapers can be easily read. As a function similar to such a function, some digital cameras enlarge a subject by digital zoom and display an image of the enlarged subject on an LCD. When photographing small characters published in magazines, newspapers and the like with such a digital camera, the characters displayed on the LCD are small and difficult to read.
[0003]
[Problems to be solved by the invention]
However, the image enlarged by the digital zoom is enlarged using only a part of the digital image data stored inside the digital camera. Therefore, a digitally magnified image is displayed with a small amount of information. Therefore, unlike a case where the image is magnified with a loupe (magnifying glass), the image is magnified. On the contrary, it may be difficult to read.
[0004]
Therefore, the present invention has been made in view of the above-described circumstances, and in digitally enlarging and displaying captured characters, a character display device capable of displaying characters more easily, a control method thereof, a recording medium, and The purpose is to provide the program.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, a character display device according to the present invention includes an image generation unit configured to capture an image corresponding to a predetermined imaging region to generate image data, and a character included in the image from the image data. And a display image data generation unit that generates display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font and a two-dimensional arrangement. And a display unit for extracting a part of the display image corresponding to the display image data and displaying the extracted image as an actual display image.
[0006]
According to this configuration, the characters included in the captured image are recognized by the recognition unit together with the two-dimensional arrangement of the characters. Then, the recognized characters are arranged in accordance with the two-dimensional arrangement, and display image data for displaying the arranged characters using a predetermined character font is generated by the display image data generation unit. Thus, the display unit can extract a part of the display image corresponding to the display image data and display the actual display image.
[0007]
Further, in the character display device described above, assuming a two-dimensional plane including the two-dimensionally arranged characters, including a detection unit that detects the amount and direction of movement of the imaging region in the two-dimensional plane, The display unit may change the extraction position according to a moving amount and a moving direction of the imaging region detected by the detecting unit.
[0008]
In the character display device described above, when there is an image area that cannot be recognized as a character by the recognition unit, the display image data stores image data corresponding to the unrecognizable image area. The display unit displays an image corresponding to the image data based on the stored image data corresponding to the unrecognizable image area according to the character size of a character font that displays the recognized character. You may make it do.
[0009]
A method for controlling a character display device according to the present invention includes: an image generation step of capturing an image corresponding to a predetermined imaging area to generate image data; and characters included in the image from the image data along with a two-dimensional arrangement thereof. A recognition step of recognizing, a display image data generating step of generating display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font, and the display image Displaying a part of the display image corresponding to the data and displaying the extracted image as an actual display image.
[0010]
A recording medium storing a program for controlling the character display device according to the present invention includes a computer, an image generation unit that captures an image corresponding to a predetermined imaging area to generate image data, and Recognition means for recognizing characters included in an image together with their two-dimensional arrangement, and display for generating display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font And a program for functioning as display means for extracting part of the display image corresponding to the display image data and displaying the extracted image as an actual display image.
[0011]
A program for controlling a character display device according to the present invention includes: a computer that captures an image corresponding to a predetermined imaging region to generate image data; and a character included in the image from the image data. And a display image data generating means for generating display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font. And a function of extracting a part of the display image corresponding to the display image data and displaying the extracted image as an actual display image.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, a preferred embodiment of the present invention will be described with reference to the drawings.
[1] Configuration of the embodiment
A schematic configuration of a digital camera 1 having a loupe (magnifying glass) function according to an embodiment of the present invention will be described with reference to FIG.
The digital camera 1 includes an imaging unit 10. The imaging unit 10 includes a lens 101, a charge coupled device (CCD) 102, and a signal processing unit 103.
[0013]
The CCD 102 converts the captured image projected by the lens 101 into an analog image signal SAG, and outputs the analog image signal SAG to the signal processing unit 103. The signal processing unit 103 performs noise removal / gain control processing and the like from the analog image signal SAG, converts the processed analog image signal into digital image data DDG, and outputs the digital image data DDG to the frame buffer 13.
The frame buffer 13 is a memory that stores digital image data DDG. The frame buffer 13 stores digital image data DDG for one frame. More specifically, for example, when the CCD has n rows and m columns of pixels, the frame buffer 13 stores digital image data DDG for n × m pixels.
[0014]
The operation unit 14 includes various switches used when the user operates the digital camera 1. The various switches include the following. The shutter switch 141 is used to perform an operation for giving an instruction to record a captured image when recording the image. The pause switch 142 is used to perform an operation for giving an instruction to temporarily hold an image displayed on the LCD (Liquid Crystal Display) 19. The mode setting switch 143 is a “normal mode” that allows the digital camera 1 to function to capture and record an image, and a “character display mode” that allows the digital camera 1 to function to display characters on the LCD 19. It is used to perform an operation for switching between and.
The operation unit 14 outputs a signal corresponding to the operation state of the user and supplies the signal to the control unit 15. The control unit 15 performs control corresponding to an operation signal from the operation unit 14 for each unit of the apparatus. The control unit 15 causes the VRAM 18 to output character display image data DMHG corresponding to a display target portion of the character image data DMG generated by the character recognition processing unit 20 described later.
[0015]
The character information file 21 is a file that stores an outline font of a character in association with a standard character pattern generated by extracting characteristics of the registered character. Here, the character feature is obtained by decomposing a character into directional components such as a vertical direction, a horizontal direction, an oblique left direction, and an oblique right direction, and patterning the characteristics of the character based on these directional components.
[0016]
When the mode setting switch 143 is set to the “character display mode” side, the character recognition processing unit 20 refers to the character information file 21 and refers to the image corresponding to the digital image data DDG stored in the frame buffer 13. , And extracts an outline font corresponding to the recognized character. The character recognition processing unit 20 generates character image data DMG based on the characters displayed by the extracted outline font. Here, the characters displayed in the outline font are displayed in a predetermined character size.
The character recognition buffer 22 is a memory that stores the character image data DMG generated by the character recognition processing unit 20.
[0017]
When the mode setting switch 143 is set to the “normal mode”, the image processing unit 17 performs edge enhancement, brightness adjustment, color adjustment, and digital image data DDG stored in the frame buffer 13. Performs digital image processing such as white balance adjustment and backlight compensation. The image processing unit 17 performs color reduction and pixel thinning processing on the digital image data subjected to the digital image processing in accordance with the display capability of the LCD 19 to generate display image data DHG. The image processing unit 17 outputs the display image data DHG to the VRAM 18.
The VRAM 18 stores display image data DHG or character display image data DMHG. The LCD 19 is provided on the back of the digital camera 1 and displays an image corresponding to the display image data DHG or the character display image data DMHG stored in the VRAM 18.
[0018]
Here, FIG. 2 illustrates a state in which characters of a predetermined character size corresponding to characters captured by the lens 101 of the digital camera 1 are displayed on the LCD 19. When the lens 101 portion of the digital camera 1 set on the “character display mode” side is brought close to the paper surface 2 on which characters are described, the captured characters are displayed on the LCD 19 provided on the back of the digital camera 1. Is displayed in a predetermined character size. In the case shown in FIG. 2, the vicinity of the character “early countermeasures” among the characters described on the paper 2 is displayed on the LCD 19.
[0019]
The flash memory 16 is a memory that stores and stores digital image data DDG stored in the frame buffer 13 when the digital camera 1 is used in the “normal mode”. The digital image data DCDG stored in the flash memory 16 is stored after being compressed in the JPEG format. Note that the flash memory 16 may be a RAM, a magnetic disk, or the like. Further, a removable memory such as a memory card may be provided by providing a card interface.
[0020]
[2] Operation of the embodiment
[2.1] Operation in normal mode
Next, an operation example when the mode setting switch 143 is set to the “normal mode” will be described with reference to FIG.
First, the user turns the lens 101 of the digital camera 1 toward a subject to photograph the subject.
Next, the CCD 102 converts the subject image (light signal) input from the lens 101 into an analog image signal SAG, and outputs the analog image signal SAG to the signal processing unit 103 (step S1). The signal processing unit 103 performs noise removal / gain control processing and analog / digital conversion processing on the input analog image signal SAG. The control unit 15 stores one frame of digital image data DDG in the frame buffer 13 (step S2).
[0021]
Further, the control unit 15 transmits a signal indicating that the mode setting switch 143 is set to the “normal mode” to the image processing unit 17 (step S3).
The image processing unit 17 performs digital image processing such as edge enhancement, brightness adjustment, hue adjustment, white balance adjustment, backlight correction, and the like on the digital image data DDG stored in the frame buffer 13 (step S4).
Next, the image processing unit 17 performs color reduction and pixel thinning processing on the digital image data subjected to the digital image processing according to the display capability of the LCD 19 to generate display image data DHG. Then, the image processing unit 17 stores the display image data DHG in the VRAM 18. The control unit 15 displays the digital image data DHG stored in the VRAM 18 on the LCD 19 provided on the back of the digital camera 1 (Step S5).
[0022]
Here, when the shutter switch 141 is pressed by the user, the control unit 15 compresses the digital image data DDG of the subject stored in the frame buffer 13 in the JPEG format. Then, the control unit 15 stores the compressed digital image data DCDG in the flash memory 16.
[0023]
[2.2] Operation in character display mode
Next, an operation example when the mode setting switch 143 is set to the “character display mode” will be described with reference to FIG.
First, the user turns the lens 101 of the digital camera 1 toward a subject such as a newspaper or a magazine containing characters in order to view the characters.
Next, the CCD 102 converts the subject image (light signal) input from the lens 101 into an analog image signal SAG and outputs the analog image signal SAG to the signal processing unit 103 (step S11). The signal processing unit 103 performs noise removal / gain control processing and analog / digital conversion processing on the converted analog image signal SAG. The control unit 15 stores the digital image data DDG for one frame in the frame buffer 13 (Step S12).
The control unit 15 transmits a signal indicating that the mode setting switch 143 is set to the “character display mode” to the character recognition processing unit 18 (Step S13).
[0024]
Next, the character recognition processing unit 20 recognizes characters from an image corresponding to the digital image data DDG based on the standard character pattern stored in the character information file 21 (Step S14). Then, the character recognition processing unit 20 extracts an outline font corresponding to the character recognized from the image corresponding to the digital image data DDG from the character information file 21 (Step S15). The processing in steps S14 and S15 will be described later in detail.
The character recognition processing unit 20 generates character image data DMG based on the character represented by the extracted outline font, and stores the generated character image data DMG in the character recognition buffer 22 (step S16).
[0025]
Next, the control unit 15 causes the VRAM 18 to store the character display image data DMHG corresponding to the character string located substantially at the center of the image corresponding to the character image data DMG stored in the character recognition buffer 22. The control unit 15 causes the LCD 19 provided on the back of the digital camera 1 to display an image including a character string corresponding to the character display image data DMHG stored in the VRAM 18 (Step S17). That is, an image including a character string corresponding to the character display image data DMHG corresponds to an image in which characters corresponding to the character display image data DMHG are displayed in an outline font having a character size specified in advance.
[0026]
In this manner, the LCD 19 displays beautiful characters represented by the outline font in a predetermined size that is easy for the user to read. When the digital camera 1 is moved, the character recognition processing unit 20 detects the direction and the amount of movement, and the image displayed on the LCD 19 is updated according to the detected direction and amount of movement.
[0027]
Next, an operation example when the pause switch 142 is pressed while the mode setting switch 143 is set to the “character display mode” will be described.
When the pause switch 142 is pressed by the user, the control unit 15 stops the processing by the character recognition processing unit 20 and holds the character display image data DMHG stored in the VRAM 18. Until the pause switch 142 is pressed again by the user, the control unit 15 continues to stop the processing by the character recognition processing unit 20 and continues to hold the character display image data DMHG stored in the VRAM 18.
When the pause switch 142 is pressed again by the user, the control unit 15 restarts the processing by the character recognition processing unit 20 and updates the character display image data DMHG stored in the VRAM 18.
This makes it possible to temporarily hold an image including the characters displayed on the LCD 19 in a state desired by the user.
[0028]
[2.3] Specific operation of character recognition
Next, a description will be given of an operation example until a character is recognized from a captured image and an outline font corresponding to the recognized character is stored in the character recognition buffer.
First, the character recognition processing unit 20 specifies a character portion from data included in the digital image data DDG stored in the frame buffer 13, and decomposes the specified character portion for each character. In this case, it is preferable to perform various preprocessing such as inclination correction of the digital image data DDG as necessary before specifying the character portion. Next, the character recognition processing unit 20 generates a character pattern by extracting the characteristics of the character for each decomposed character, and generates the generated character pattern and all the standard character patterns stored in the character information file 21. Calculate the distance between As a method of calculating this distance, a method such as a Euclidean distance or an absolute value distance (city block distance) is used.
[0029]
As a result of the above-described distance calculation, the character recognition processing unit 20 selects a standard character pattern having the smallest distance from all the standard character patterns, and a character corresponding to the selected standard character pattern has been recognized from the captured image. Characters.
Next, the character recognition processing unit 20 extracts an outline font corresponding to the selected standard character pattern from the character information file 21, and places a character represented by the extracted outline font in a character pattern extraction position (two-dimensional position). It is stored in the character recognition buffer 22 in association with it.
Through this series of operations, the character recognition processing unit 20 recognizes a character from the captured image, stores an outline font corresponding to the recognized character in the character recognition buffer 22 while maintaining a two-dimensional display array. I have.
[0030]
[2.4] Specific operation when displaying recognized characters
Next, an example of operation until characters are recognized from the captured image and the recognized characters are displayed on the LCD will be described with reference to FIG.
FIG. 5 shows a relationship between a character group Ba stored in the character recognition buffer 22 and a character group La displayed on the LCD 19 when a character described on the paper 2 is captured by the digital camera 1. Things.
[0031]
As shown in FIG. 5, the character group La displayed on the LCD 19 is located at the center of the character group Ba stored in the character recognition buffer 22. By locating the character group La in the center of the character group Ba in this way, even when the digital camera 1 moves, the amount of movement is small, and the character group La displayed on the LCD 19 after the movement is shifted. When the character exists in the range of the character group Ba stored in the previous character recognition buffer 22, the character can be immediately displayed on the LCD 19.
On the other hand, if the movement amount is large and the character group La to be displayed on the LCD 19 after the movement does not exist within the range of the character group Ba stored in the character recognition buffer 22 before the movement, the character to be displayed is not displayed. The characters are displayed on the LCD 19 after being recognized and stored in the character recognition buffer 22.
[0032]
First, when the image on the paper surface 2 is captured by the lens 101 into the digital camera, the digital image data DDG including the character group Ba shown in FIG. The character recognition processing unit 20 recognizes all characters from the digital image data DDG stored in the frame buffer 13 and causes the character recognition buffer 22 to store a character represented by an outline font corresponding to the recognized character.
[0033]
Next, assuming that the character group Ba stored in the character recognition buffer 22 is arranged on a plane so as to be displayed, the control unit 15 determines the character group including the character group La located at the central portion and includes the character “Note Pasoko”. The display image data DMHG is generated, and the generated character display image data DMHG is stored in the VRAM 18. As a result, the LCD 19 displays an image including the entire character “note pasoko”.
[0034]
Next, when the digital camera 1 moves diagonally to the lower left of the paper surface 2, digital image data DDG including the character group Bb shown in FIG. At this time, if there is a part that has already been taken in, the part that has been taken in is not taken in again.
Next, the character recognition processing unit 20 calculates a movement vector based on a reference position preset at a substantially central position on the display screen. In the case of the present embodiment, the upper right end of “No” located at the top of the character group La shown in FIG. 5 is the reference position.
[0035]
More specifically, when the character group stored in the frame buffer 13 changes from the character group Ba shown in FIG. 5 to the character group Bb shown in FIG. 6, for example, as shown in FIG. The movement vector S is obtained based on the position where the upper right end of “NO” corresponding to the reference position has moved after the change. It should be noted that if the character corresponding to the reference position is set not to one character but to a plurality of characters separated from each other, the movement direction can be detected more accurately by detecting the same.
[0036]
The character recognition processing unit 20 obtains, based on the calculated movement vector S, a difference area of the digital image data including characters that were not stored before the movement among the digital image data DDG stored in the frame buffer 13. . Specifically, as shown in FIG. 7, of the digital image data DDG stored in the frame buffer 13, the same direction and the same size (movement amount) as the movement vector S starting from the four end points of the digital image data. Is a difference area of digital image data including characters that are not stored before the movement.
[0037]
Therefore, the character recognition processing unit 20 recognizes a character included in the region R, and stores a character represented by an outline font corresponding to the recognized character in the region R ′ of the character recognition buffer 22.
Then, when assuming that the character group Bb stored in the character recognition buffer 22 is arranged on a plane to be displayed, the character recognition processing unit 20 determines that the character group Lb located at the center of the The character display image data DMHG including “U” is generated, and the generated character display image data DMHG is stored in the VRAM 18.
[0038]
As a result, the LCD 19 includes only a part of the character “Note Notebook” instead of the image including the entire character “Note Notebook” as shown in FIG. Image is displayed.
Characters near the four end points of the character groups Ba and Bb stored in the frame buffer 13 often lack part of the characters, but such characters are excluded from character recognition. It is not stored in the buffer 22.
[0039]
The method for realizing various functions of the digital camera according to the above-described embodiment is not limited to the case where programs for executing various functions performed in the digital camera are stored in the digital camera in advance and realized. For example, there may be a case where the program is read from a recording medium on which the program is recorded and then installed and realized, or a case where the program is downloaded to a digital camera through an electric communication line and then installed and realized.
[0040]
[3] Effects of the embodiment
As described above, in the digital camera according to the present embodiment, characters included in the image currently being captured are displayed in outline font characters set to a size that is easy for each user to read, so that the digital camera is beautiful and easy to read. Characters can be displayed on the LCD, which is a display unit. Therefore, the user can use this digital camera as if it were a loupe.
[0041]
[4] Modification of Embodiment
In the above-described embodiment, the case where the digital camera has the function of character recognition processing is described. However, the function of the character recognition processing is not limited to the digital camera. For example, this function may be provided in a portable information device (PDA) having an imaging function and a display function, a mobile phone, a simplified mobile phone, a digital video, a clock, and other portable information devices. Further, any information device other than the above-described information devices may be provided as long as it has an imaging function and a display function.
In addition, a function of character recognition processing may be provided for any device having an imaging function or a device having a display function. In this case, each device may be provided with a wireless communication interface for infrared rays or the like, and each processing of imaging, character recognition, and display may be performed via the wireless communication interface.
[0042]
Further, in the above-described embodiment, the characters recognized by the character recognition processing unit 20 are displayed on the LCD 19, but the method of displaying the characters on the LCD 19 is not limited to this. For example, when there is an image that cannot be recognized as a character by the character recognition processing unit 20, an image of a predetermined area including a character (or a graphic or the like) before the character recognition is stored in that part. You may make it display according to the character size of the outline font of the other character which recognized the character. As a result, even if the character cannot be recognized, it is possible to display the character according to the original sentence, and the user can read. In this case, it is preferable to appropriately set a threshold value for discriminating the color (background color) of the paper to be imaged in order to prevent erroneous detection of stains and the like and storage of unnecessary images.
[0043]
Further, in the above-described embodiment, characters are photographed by the digital camera 1 held in the hand, but the present invention is not limited to this. For example, the digital camera is fixed on a stand with legs and the stand is moved. Thus, the imaged characters may be displayed. Thereby, the distance between the digital camera and the paper surface can be kept constant, and furthermore, the paper surface and the lens can be kept parallel, so that the character recognition rate can be improved. Further, various pre-processing steps such as correction of inclination of digital image data can be simplified, and the processing can be speeded up.
[0044]
In the above-described embodiment, the character size of the character displayed on the LCD 19 is fixed to a predetermined character size, but the present invention is not limited to this. For example, the operation unit 14 may be provided with a size setting unit for setting the character size, and the character size of the character displayed on the LCD 19 may be determined based on the character size set in the size setting unit.
Also, instead of setting the character size, a magnification for display may be set. In this case, for example, the average size of the recognized character is detected, and the character size to be actually displayed is automatically set and displayed. Specifically, when the average character size is detected to be 9 points, if the magnification is set to 2 times, the displayed character size is automatically set to 18 points.
In these cases, if the character recognition processing unit 20 performs the outline correction processing on the character represented by the outline font, the character recognition processing unit 20 can maintain a beautiful character even if the size of the displayed character changes. Can be displayed.
[0045]
In the above-described embodiment, when characters to be displayed on the LCD 19 are moved when the mode setting switch 143 is set to the “character display mode”, the digital camera 1 itself needs to be moved. As a method of moving a character to be displayed on the LCD 19, for example, a cursor portion for moving a display character is provided in the operation section 14, and the character to be displayed is displayed in accordance with the movement amount and the movement direction instructed by the cursor portion. The character image data DMG stored in the recognition buffer 22 may be moved within the range.
[0046]
In the above-described embodiment, an outline font is used to display a recognized character, but the present invention is not limited to this. For example, a bitmap font may be used to display recognized characters. In this case, it is preferable to perform a process for reducing jaggies (jagged characters) such as an anti-aliasing process and a smoothing process.
[0047]
In the above-described embodiment, the digital image data stored in the VRAM 18 is displayed on the LCD 19; however, the display method on the LCD 19 is not limited to this. For example, the VRAM 18 is divided into two layers, and in the “character display mode”, the character display image data DMHG generated by the control unit 15 is stored in one layer of the VRAM 18, and the other layer of the VRAM 18 is stored in the other layer. The display image data DHG generated by the image processing unit 17 is stored. The operation unit 14 may be provided with a display changeover switch, and the VRAM 18 to be displayed on the LCD 19 may be changed over according to the operation performed on the display changeover switch. Thus, in the “character display mode”, an image corresponding to the character display image data DMHG in which characters are easily read and edited and an image corresponding to the display image data DHG can be alternately displayed on the LCD 19. Will be possible.
[0048]
【The invention's effect】
As described above, according to the present invention, even when characters included in a captured image are digitally enlarged, it is possible to display the characters more easily.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a schematic configuration of a digital camera according to an embodiment.
FIG. 2 is a diagram illustrating a use state of the digital camera illustrated in FIG. 1;
FIG. 3 is a flowchart illustrating an operation example of the digital camera illustrated in FIG. 1;
FIG. 4 is a flowchart illustrating an operation example of the digital camera illustrated in FIG. 1;
FIG. 5 is a diagram illustrating a relationship between a character group stored in a character recognition buffer of the digital camera shown in FIG. 1 and a character group displayed on an LCD.
FIG. 6 is a diagram exemplifying a relationship between a character group stored in a character recognition buffer of the digital camera shown in FIG. 1 and a character group displayed on an LCD.
FIG. 7 is a diagram exemplifying a difference area when a character group stored in a character recognition buffer of the digital camera shown in FIG. 1 moves.
FIG. 8 is a diagram exemplifying an image displayed on the LCD of the digital camera shown in FIG. 1;
[Explanation of symbols]
1. Digital camera (character display device)
10: imaging unit (image generation unit)
13 ... frame buffer,
14 ... operation unit (setting unit)
15 ... control unit (display unit)
16 Flash memory,
17 ... Image processing unit,
18 ... VRAM,
19 LCD (display unit),
20: character recognition processing unit (recognition unit, display image data generation unit, pattern extraction unit, comparison unit, detection unit),
21: Character information file (pattern storage unit)
22 ... Character recognition buffer.

Claims (19)

An image generation unit that captures an image corresponding to a predetermined imaging region and generates image data;
A recognition unit that recognizes characters included in the image from the image data together with the two-dimensional arrangement thereof,
A display image data generation unit that generates display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font,
A display unit for extracting a part of the display image corresponding to the display image data and displaying the extracted image as an actual display image,
A character display device comprising: The character display device according to claim 1,
A pattern storage unit for storing a plurality of character patterns as standard character patterns,
The recognition unit includes a pattern extraction unit that extracts a character pattern from the image data, and a comparison unit that sequentially compares the extracted character pattern with the stored plurality of standard character patterns. A character display device, wherein a character corresponding to a standard character pattern most similar to the extracted character pattern is recognized as a character included in the image based on the extracted character pattern. The character display device according to claim 1,
Assuming a two-dimensional plane including the two-dimensionally arranged characters, a detection unit that detects the amount and direction of movement of the imaging region in the two-dimensional plane,
The character display device, wherein the display unit changes an extraction position according to a movement amount and a movement direction of the imaging region detected by the detection unit. The character display device according to claim 1,
An operation unit for instructing a change in the position of extraction by the display unit,
The character display device, wherein the display unit changes an extraction position in accordance with an instruction given by the operation unit. The character display device according to claim 1,
The character display device, wherein the display unit extracts, as the actual display image, a part located substantially at the center of the display image corresponding to the display image data. The character display device according to claim 1,
When there is an image area that cannot be recognized as a character by the recognition unit, image data corresponding to the unrecognizable image area is stored in the display image data. The character display device according to claim 6,
A character display device, based on image data corresponding to the unrecognizable image area, displaying an image corresponding to the image data in accordance with the character size of a character font for displaying recognized characters. The character display device according to claim 1,
A setting unit that sets a character size or a magnification of characters included in the display image,
The character display device, wherein the display unit displays a display image including characters corresponding to the set character size or magnification. The character display device according to claim 1,
An operation unit that instructs to hold a state displayed by the display unit,
The character display device, wherein the display unit holds the displayed state when the display unit is instructed to maintain the displayed state by the operation unit. The character display device according to claim 1,
The character display device according to claim 1, wherein the character font is an outline font. An image generation step of capturing an image corresponding to a predetermined imaging region and generating image data;
A recognition step of recognizing characters included in the image together with the two-dimensional arrangement from the image data,
A display image data generating step of generating display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font,
A display step of extracting a part of the display image corresponding to the display image data and displaying it as an actual display image,
A method for controlling a character display device, comprising: The control method for a character display device according to claim 11,
Assuming a two-dimensional plane including the two-dimensionally arranged characters, comprising a detection step of detecting the amount and direction of movement of the imaging region in the two-dimensional plane,
The method of controlling a character display device according to claim 1, wherein in the displaying step, an extraction position is changed according to a moving amount and a moving direction of the imaging region detected in the detecting step. The control method for a character display device according to claim 11,
When there is an image area that cannot be recognized as a character in the recognition step, the display image data stores image data corresponding to the unrecognizable image area,
The display step includes displaying an image corresponding to the image data based on the stored image data corresponding to the unrecognizable image area in accordance with the character size of a character font that displays the recognized character. A method for controlling a character display device, comprising: A recording medium recording a program for controlling a character display device,
Computer
Image generation means for capturing an image corresponding to a predetermined imaging region and generating image data,
Recognition means for recognizing characters included in the image from the image data together with their two-dimensional arrangement,
Display image data generating means for generating display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font,
A recording medium storing a program for functioning as display means for extracting a part of a display image corresponding to the display image data and displaying the extracted image as an actual display image. The recording medium according to claim 14,
Computer
Assuming a two-dimensional plane including the two-dimensionally arranged characters, function as a detecting means for detecting the amount and direction of movement of the imaging region in the two-dimensional plane,
A recording medium in which a program is recorded, wherein the display unit changes an extraction position according to a moving amount and a moving direction of the imaging region detected by the detecting unit. The recording medium according to claim 14,
If there is an image area that cannot be recognized as a character by the recognition means, the display image data stores image data corresponding to the unrecognizable image area, and the display means stores the stored recognition data. A recording medium storing a program for displaying, on the basis of image data corresponding to an impossible image area, an image corresponding to the image data in accordance with the character size of a character font for displaying a recognized character. . A program for controlling a character display device,
Computer
Image generation means for capturing an image corresponding to a predetermined imaging region and generating image data,
Recognition means for recognizing characters included in the image from the image data together with their two-dimensional arrangement,
Display image data generating means for generating display image data for arranging and displaying the recognized characters according to the two-dimensional arrangement using a predetermined character font,
A program for functioning as display means for extracting a part of a display image corresponding to the display image data and displaying the extracted image as an actual display image. The program according to claim 17,
Computer
Assuming a two-dimensional plane including the two-dimensionally arranged characters, function as a detecting means for detecting the amount and direction of movement of the imaging region in the two-dimensional plane,
The program, wherein the display unit changes an extraction position according to a moving amount and a moving direction of the imaging region detected by the detecting unit. The program according to claim 17,
If there is an image area that cannot be recognized as a character by the recognition means, the display image data stores image data corresponding to the unrecognizable image area, and the display means stores the stored recognition data. A program for displaying, on the basis of image data corresponding to an impossible image area, an image corresponding to the image data in accordance with the character size of a character font for displaying recognized characters.

Images