JP2021144560A - Image processing program, image processing method, and image processing apparatus - Google Patents

Abstract

To precisely detect a date area included in a seal impression image.SOLUTION: An image processing apparatus 100 extracts an area of a seal impression included in an image. The image processing apparatus 100 specifies a first area in which a data may be included in the extracted area of the seal impression based upon information on position relation between a previously set area of a seal impression and an area of a date position included in the seal impression. The image processing apparatus 100 rotates the image area including an image of the first area based upon a reference line calculated based upon information in the specified first area. The image processing apparatus 100 outputs an image of the image area including at least a part of an image of the first area having been rotated.SELECTED DRAWING: Figure 1

Description

The present invention relates to an image processing program and the like.

There is a technique for detecting various character strings written on a paper medium by using an image processing technique such as OCR (Optical Character Reader). For example, there is a conventional technique of recognizing a date or the like by detecting a stamp image stamped on a form or the like using OCR and performing character recognition on the stamp image.

Japanese Unexamined Patent Publication No. 2013-84071 Japanese Unexamined Patent Publication No. 2019-197444

However, the above-mentioned conventional technique has a problem that the date region included in the stamp image cannot be detected accurately.

For example, when a user stamps a stamp on a form or the like, it is rare that the stamp is stamped straight, and the date of the stamp image is often tilted. In this way, if the date is tilted, the date area included in the stamp image cannot be detected accurately, and the recognition accuracy also deteriorates.

In one aspect, it is an object of the present invention to provide an image processing program, an image processing method, and an image processing apparatus capable of accurately detecting a date region included in a stamp image.

In the first plan, the computer is made to perform the following processing. The computer extracts the area of the seal included in the image. The computer identifies a first region in the extracted stamp region where the date can be included, based on the information on the positional relationship between the preset region of the stamp and the region of the date position included in the stamp. The computer rotates the image region containing the image of the first region based on the reference line calculated based on the information in the identified first region. The computer outputs an image of an image region that includes at least a portion of the image of the first region after rotation.

The date area included in the seal image can be extracted accurately.

FIG. 1 is a diagram for explaining the processing of the image processing apparatus according to the first embodiment. FIG. 2 is a functional block diagram showing the configuration of the image processing apparatus according to the first embodiment. FIG. 3 is a diagram showing an example of a data structure of positional relationship information. FIG. 4 is a diagram for explaining the distance from the reference point. FIG. 5 is a diagram for explaining the processing of the extraction unit. FIG. 6 is a flowchart showing a processing procedure of the image processing apparatus according to the first embodiment. FIG. 7 is a diagram for explaining the processing of the image processing apparatus according to the second embodiment. FIG. 8 is a functional block diagram showing the configuration of the image processing apparatus according to the second embodiment. FIG. 9 is a flowchart showing a processing procedure of the image processing apparatus according to the second embodiment. FIG. 10 is a diagram showing an example of a computer hardware configuration that realizes the same functions as the image processing device of the embodiment.

Hereinafter, examples of the image processing program, the image processing method, and the image processing apparatus disclosed in the present application will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

FIG. 1 is a diagram for explaining the processing of the image processing apparatus according to the first embodiment. As shown in FIG. 1, the image processing apparatus acquires the image on which the seal stamp is stamped and extracts the area 50 of the seal stamp included in the image (step S10).

The image processing device is a partial area included in the seal area 50 based on the information on the positional relationship between the preset area of the seal and the coordinates (or area) of the date position included in the seal. The region (date-containing region 50a) where the date will be described is specified (cut out) (step S11). For example, the date-containing region 50a corresponds to the "first region".

The image processing apparatus generates a binarized image 50b by executing a binarization process on the image in the date-containing region 50a (step S12).

The image processing apparatus generates the converted image 50c by executing the morphological conversion (expansion) on the binarized image 50b. In the morphology transformation (expansion), the line segment is corrected to be thick. The image processing device calculates the reference line 51 from the converted image 50c (step S13).

The image processing device rotates the converted image 50c until the reference line 51 becomes horizontal (step S14). The image processing device outputs the rotated image 50d rotated in step S14.

As described above, the image processing apparatus according to the first embodiment identifies the date-containing region 50a on which the date will be written from the region 50 of the seal stamp, and calculates the reference line. The image processing device outputs a rotated image 50d (a rotated image of the date-containing region 50a) rotated until the reference line becomes horizontal. As a result, the date area included in the seal area 50 can be accurately extracted.

Next, an example of the configuration of the image processing apparatus according to the first embodiment will be described. FIG. 2 is a functional block diagram showing the configuration of the image processing apparatus according to the first embodiment. As shown in FIG. 2, the image processing device 100 is connected to the scanner 55. The image processing device 100 includes a communication unit 110, an input unit 120, a display unit 130, a storage unit 140, and a control unit 150.

The scanner 55 is a device that generates image data by electronically reading the surface of a paper medium (contract, form, etc.) on which a seal is stamped. In this embodiment, the scanner 55 is assumed to generate image data of a stamped paper medium. The scanner 55 outputs the image data to the communication unit 110 of the image processing device 100.

The communication unit 110 is a device that connects to the scanner 55 and acquires image data. The communication unit 110 is an example of a communication device. Although not shown, the communication unit 110 may be connected to another external device via a network to execute data communication. The control unit 150, which will be described later, solves the communication unit 110 and exchanges data with the scanner 55, an external device, and the like.

The input unit 120 is an input device for inputting various data to the control unit 150 of the image processing device 100. The input unit 120 corresponds to a keyboard, a mouse, a touch panel, and the like.

The display unit 130 is a display device that displays information output from the control unit 150. The display unit 130 corresponds to an organic EL (Electro Luminescence) display, a liquid crystal display, a touch panel, and the like.

The storage unit 140 has the positional relationship information 141. The storage unit 140 corresponds to a semiconductor memory element such as a RAM (Random Access Memory) and a flash memory (Flash Memory), and a storage device such as an HDD (Hard Disk Drive).

The positional relationship information 141 is information that defines the positional relationship between the area of the seal stamp and the coordinates of the date position included in the seal stamp. FIG. 3 is a diagram showing an example of a data structure of positional relationship information. As shown in FIG. 3, the positional relationship information 141 associates the identification information with the diameter and the distance from the reference point. The identification information is information that identifies each record. The diameter indicates the diameter of the area of the seal. The distance from the reference point indicates the distance from the reference point in the stamp area to the date-containing area.

FIG. 4 is a diagram for explaining the distance from the reference point. In FIG. 4, the circle 5 corresponds to the area of the seal stamp. The reference points are the reference points 5a and 5b. The reference point 5a corresponds to the point of contact between the upper end of the circle 5 and the horizontal line. The reference point 5b corresponds to the point of contact between the lower end of the circle 5 and the horizontal line. The distance y from the reference point corresponds to the distance from the reference point 5a to the upper end 6a of the date-containing region 6 and the distance from the reference point 5b to the lower end 6b of the date-containing region 6.

Returning to the description of FIG. The control unit 150 includes an acquisition unit 151, a specific unit 152, an extraction unit 153, and a character recognition unit 154. The control unit 150 can be realized by a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or the like. The control unit 150 can also be realized by hard-wired logic such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).

The acquisition unit 151 is a processing unit that acquires image data stamped with a seal from the scanner 55. The acquisition unit 151 outputs the acquired image data to the specific unit 152.

The identification unit 152 is a processing unit that extracts the area of the seal stamp included in the image data and specifies the date-containing area in which the date included in the area of the seal stamp is likely to be described based on the positional relationship information 141. ..

The process of extracting the area of the seal stamp included in the image data by the specific unit 152 will be described. For example, the specific unit 152 scans the image data and detects a region corresponding to a preset color and shape pattern of the stamp as a stamp region.

The specific unit 152 describes the process of specifying the date-containing region. When the area of the seal stamp is extracted, the specific unit 152 calculates the diameter of the area of the seal stamp. The specific unit 152 compares the calculated diameter with each diameter set in the positional relationship information 141, and selects the distance from the reference point corresponding to the closest diameter. The identification unit 152 identifies the date-containing area included in the area of the seal stamp based on the distance from the selected reference point.

For example, when the diameter closest to the diameter D of the seal area is A2, the specific unit 152 selects the distance y2 from the reference point, and the date is based on the distance y2 from the selected reference point. Identify the content region.

The specific unit 152 cuts out an image of the date-containing region from the image of the seal stamp, and outputs the cut-out image to the extraction unit 153.

The extraction unit 153 calculates a reference line based on the image of the date-containing region, and rotates the image of the date-containing region so that the reference line is horizontal. The extraction unit 153 outputs an image (rotated image) of the date-containing region after rotation to the character recognition unit 154. The extraction unit 153 may output the rotated image to the display unit 130 and display it.

The process of calculating the reference line by the extraction unit 153 will be described. The extraction unit 153 executes a binarization process on the image in the date-containing region. For example, the pixel values of the pixels in the date-containing region are compared with the threshold value, and the pixels whose pixel value is equal to or greater than the threshold value are set to white pixels "255", and the pixels whose pixel value is less than the threshold value are black pixels. By changing to "0", binarization is executed. The image of the binarized date-containing region is referred to as a binarized image.

The extraction unit 153 executes a morphology conversion (expansion) on the binarized image to generate a converted image in which the line segment connecting the black pixels included in the binarized image is thickened. Morphology transformation is an example of "conversion processing".

For example, the extraction unit 153 arranges a kernel of a predetermined size on a binarized image, and when at least one of a plurality of pixels included in the kernel contains a black pixel, the pixel in the kernel is blackened. Convert to pixels. The extraction unit 153 executes the morphology conversion (expansion) by repeatedly executing the above processing while moving the position of the kernel.

The extraction unit 153 extracts a closed region surrounded by black pixels (a group of lines connecting the black images) from the converted image. FIG. 5 is a diagram for explaining the processing of the extraction unit. As shown in FIG. 5, the extraction unit 153 extracts the closed region 52 from the converted image 50c. When a plurality of closed regions are extracted, the extraction unit 153 selects the closed region having the maximum size of the region.

The extraction unit 153 calculates the longest line segment 51 among the line segments constituting the closed region 52 as a reference line.

The process of rotating the image of the date-containing region by the extraction unit 153 will be described. The extraction unit 153 generates a rotated image by rotating the converted image until the calculated reference line becomes horizontal.

The extraction unit 153 calculates the angle until the reference line of the converted image becomes horizontal, and generates a rotated image by rotating the binarized image or the image of the date-containing region by the calculated angle. You may.

The character recognition unit 154 is a processing unit that executes character recognition processing on the rotated image and recognizes the character string of the date. The character recognition unit 154 outputs the recognition result to the display unit 130 and displays it. Alternatively, the character recognition unit 154 may notify the external device of the recognition result information via the network.

Next, an example of the processing procedure of the image processing apparatus 100 according to the first embodiment will be described. FIG. 6 is a flowchart showing a processing procedure of the image processing apparatus according to the first embodiment. As shown in FIG. 6, the acquisition unit 151 of the image processing device 100 acquires image data (step S101). The identification unit 152 of the image processing device 100 extracts the area of the seal stamp from the image data (step S102).

The identification unit 152 identifies the date-containing region in the stamp region based on the positional relationship information 141 (step S103). The extraction unit 153 of the image processing apparatus 100 generates a binarized image obtained by binarizing the image of the date-containing region (step S104).

The extraction unit 153 executes morphological conversion on the binarized image to generate the converted image (step S105). The extraction unit 153 calculates a reference line based on the converted image (step S106). The extraction unit 153 generates a rotated image by rotating the converted image so that the reference line is horizontal (step S107). The extraction unit 153 outputs a rotated image (step S108). Although the description is omitted in FIG. 6, in step S108 and subsequent steps, the character recognition unit 154 of the image processing device 100 may execute character recognition on the rotated image.

Next, the effect of the image processing apparatus 100 according to the first embodiment will be described. The image processing device 100 identifies a date-containing region 50a on which the date will be written from the stamp region 50, and calculates a reference line. The image processing device 100 outputs a rotated image 50d rotated until the reference line becomes horizontal. As a result, the date area included in the seal area 50 can be accurately extracted.

Since the image processing apparatus 100 calculates the reference line based on the converted image subjected to the binarization processing and the morphology conversion, the line segment corresponding to the region on which the date is described can be accurately extracted.

The image processing apparatus 100 extracts the line segment group forming the closed region from the converted image and identifies the reference line based on the line segment group forming the closed region, so that the calculation cost is reduced and the date is described. Areas can be identified efficiently.

By the way, as described in FIG. 1 and the like, the image processing apparatus 100 according to the first embodiment calculates the reference line after cutting out the date-containing region 50a and generates a rotated image, but the present invention is limited to this. It is not something that is done. The image processing device 100 may calculate a reference line from the image of the seal stamp, rotate the reference line so that the reference line becomes horizontal, and then cut out an image of the date-containing region.

When the stamp of the image data acquired by the image processing device 100 is greatly tilted, the date-containing area may include only the character string around the center of the actual date area, but at least the date area. A part of the border is considered to be included in the date-containing region. In this case, the image processing device 100 calculates the angle formed by the reference line and the horizontal, and then rotates the entire image of the seal stamp by the calculated angle formed. The image processing device 100 can cut out an image of the date region included in the stamp by rotating the entire image of the stamp and then executing the process described in steps S11 to 14 of FIG. 1 again.

Next, the processing of the image processing apparatus according to the second embodiment will be described. FIG. 7 is a diagram for explaining the processing of the image processing apparatus according to the second embodiment. As shown in FIG. 7, the image processing apparatus acquires the image on which the seal stamp is stamped and extracts the area 60 of the seal stamp included in the image (step S20).

The image processing apparatus generates a binarized image 60a by executing a binarization process on the image in the area 60 of the seal stamp (step S21).

The image processing apparatus generates the converted image 60b by executing the morphological conversion (expansion) on the binarized image 60a. The image processing device calculates the reference line 61 from the converted image (step S22).

The image processing device rotates the converted image 60b until the reference line 61 becomes horizontal (step S23). The image processing apparatus extracts an image of the date region 60d by executing contour detection on the rotated image 60c rotated in step S23 (step S24).

As described above, the image processing apparatus according to the second embodiment calculates the reference line 61 from the stamp area 60, rotates the entire image of the stamp area 60 so that the reference line is horizontal, and then sets the date. The image of the region 60d is extracted. As a result, the date area included in the seal area 60 can be accurately extracted.

Next, an example of the configuration of the image processing apparatus according to the second embodiment will be described. FIG. 8 is a functional block diagram showing the configuration of the image processing apparatus according to the second embodiment. As shown in FIG. 8, the image processing device 200 is connected to the scanner 55. The image processing device 200 includes a communication unit 210, an input unit 220, a display unit 230, a storage unit 240, and a control unit 250.

Here, the description of the scanner 55 is the same as the description of the scanner 55 described in the first embodiment. The description of the communication unit 210, the input unit 220, and the display unit 230 is the same as the description of the communication unit 110, the input unit 120, and the display unit 130 described in the first embodiment.

The storage unit 240 has the positional relationship information 241. The storage unit 240 corresponds to a semiconductor memory element such as a RAM or a flash memory, or a storage device such as an HDD.

The positional relationship information 241 is information that defines the positional relationship between the area of the seal stamp and the coordinates of the date position included in the seal stamp. The description of the positional relationship information 241 is the same as the information regarding the positional relationship information 141 described in the first embodiment.

The control unit 250 includes an acquisition unit 251, an extraction unit 252, and a character recognition unit 253. The control unit 250 can be realized by a CPU, an MPU, or the like. The control unit 250 can also be realized by hard-wired logic such as ASIC or FPGA.

The acquisition unit 251 is a processing unit that acquires image data stamped with a seal from the scanner 55. The acquisition unit 251 outputs the acquired image data to the extraction unit 252.

The extraction unit 252 extracts the area of the seal stamp included in the image data, and calculates the reference line from the area of the seal stamp. The extraction unit 252 rotates the entire area of the seal stamp so that the reference line is horizontal, and extracts the date area.

The process of extracting the stamp region included in the image data by the extraction unit 252 will be described. For example, the extraction unit 252 scans the image data and detects a region corresponding to a preset color and shape pattern of the stamp as a stamp region.

The process of calculating the reference line from the area of the seal stamp by the extraction unit 252 will be described. The extraction unit 252 generates a binarized image by executing a binarization process on the image in the area of the seal stamp. The description of the binarization process executed by the extraction unit 252 is the same as the description of the binarization process executed by the extraction unit 153 described in the first embodiment.

The extraction unit 252 executes a morphology conversion (expansion) on the binarized image to generate a converted image in which the line segment connecting the black pixels included in the binarized image is thickened. The description of the morphology conversion executed by the extraction unit 252 is the same as the description of the morphology conversion executed by the extraction unit 153 described in the first embodiment.

The extraction unit 252 extracts a closed region surrounded by black pixels (a group of lines connecting the black images) from the converted image. When a plurality of closed regions are extracted, the extraction unit 252 selects the closed region having the maximum size of the region. The extraction unit 252 calculates the longest line segment among the line segments constituting the selected closed region as a reference line.

The extraction unit 252 generates a rotated image by rotating the converted image until the reference line becomes horizontal. Here, the extraction unit 252 may extract the date region included in the rotated image based on the positional relationship information 241 or the closed region having the maximum size among the plurality of closed regions from the rotated image. May be extracted as a date area. The process of the extraction unit 252 specifying the date region based on the positional relationship information 241 is the same as the process of the specific unit 152 described in the first embodiment specifying the date-containing region.

The extraction unit 252 outputs the extracted image of the date area to the character recognition unit 253. The extraction unit 252 may output the image of the date area to the display unit 230 and display it.

The character recognition unit 253 is a processing unit that executes character recognition processing on the image in the date area and recognizes the character string of the date. The character recognition unit 253 outputs the recognition result to the display unit 230 and displays it. Alternatively, the character recognition unit 253 may notify the external device of the recognition result information via the network.

Next, an example of the processing procedure of the image processing apparatus 200 according to the second embodiment will be described. FIG. 9 is a flowchart showing a processing procedure of the image processing apparatus according to the second embodiment. As shown in FIG. 10, the acquisition unit 251 of the image processing apparatus 200 acquires image data (step S201).

The extraction unit 252 of the image processing device 200 extracts a stamp region from the image data (step S202). The extraction unit 252 generates a binarized image obtained by binarizing the image in the area of the seal stamp (step S203).

The extraction unit 252 executes morphological conversion on the binarized image to generate the converted image (step S204). The extraction unit 252 calculates a reference line based on the converted image (step S205). The extraction unit 153 generates a rotated image by rotating the converted image (converted image of the entire area of the seal stamp) so that the reference line is horizontal (step S206).

The extraction unit 252 extracts a date region from the rotated converted image (step S207). Although the description is omitted in FIG. 9, in step S206 and subsequent steps, the character recognition unit 154 of the image processing device 200 may execute character recognition on the date area.

As described above, the image processing apparatus 200 according to the second embodiment calculates a reference line from the stamp area, rotates the entire image of the stamp area so that the reference line is horizontal, and then determines the date area. Extract the image. As a result, even if the date of the seal stamp is tilted, the area of the date included in the area of the seal stamp can be accurately extracted.

Next, an example of a computer hardware configuration that realizes the same functions as the image processing apparatus 100 (200) shown in the above embodiment will be described. FIG. 10 is a diagram showing an example of a computer hardware configuration that realizes the same functions as the image processing device of the embodiment.

As shown in FIG. 10, the computer 300 includes a CPU 301 that executes various arithmetic processes, an input device 302 that receives data input from a user, and a display 303. Further, the computer 300 has a reading device 304 that reads a program or the like from a storage medium, and a communication device 305 that exchanges data between the scanner 55, an external device, or the like via a wired or wireless network. Further, the computer 300 has a RAM 306 that temporarily stores various information and a hard disk device 307. Then, each of the devices 301 to 307 is connected to the bus 308.

The hard disk device 307 includes an acquisition program 307a, a specific program 307b, an extraction program 307c, and a character recognition program 307d. Further, the CPU 301 reads out the programs 307a to 307d and deploys them in the RAM 306.

The acquisition program 307a functions as the acquisition process 306a. The specific program 307b functions as the specific process 306b. The extraction program 307c functions as the extraction process 306c. The character recognition program program 307d functions as the character recognition process 306d.

The processing of the acquisition process 306a corresponds to the processing of the acquisition units 151 and 251. The processing of the specific process 306b corresponds to the processing of the specific unit 152. The processing of the extraction process 306c corresponds to the processing of the extraction units 153 and 252. The processing of the character recognition process 306d corresponds to the processing of the character recognition units 154 and 253.

The programs 307a to 307d do not necessarily have to be stored in the hard disk device 307 from the beginning. For example, each program is stored in a "portable physical medium" such as a flexible disk (FD), a CD-ROM, a DVD, a magneto-optical disk, or an IC card inserted into the computer 300. Then, the computer 300 may read and execute each of the programs 307a to 307d.

The following additional notes will be further disclosed with respect to the embodiments including each of the above embodiments.

(Appendix 1) To the computer
Extract the area of the seal included in the image and
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the extracted area of the seal stamp that can contain the date is specified.
Based on the reference line calculated based on the information in the specified first region, the image region including the image of the first region is rotated.
An image processing program characterized by executing a process of outputting an image of an image region including at least a part of the image of the first region after rotation.

(Appendix 2) The area of the seal stamp is rotated based on the reference line calculated based on the information in the area of the seal stamp, and the area of the seal stamp is rotated based on the information of the positional relationship. The image processing program according to Appendix 1, wherein the process of extracting the first area in which the date can be included is further executed in the area of the seal stamp.

(Appendix 3) Pixel values in the first region are binarized based on a certain threshold value, and other values existing on a line connecting one value in the image after the binarization process are used. The image processing program according to Appendix 1 or 2, wherein the conversion process is further executed.

(Appendix 4) Among the line segments obtained as a result of the conversion process, the process of specifying the reference line is further executed based on the line segment group forming the closed region in the first region. The image processing program according to Appendix 3.

(Appendix 5) The area of the seal included in the image is extracted.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the extracted area of the seal stamp that can contain the date is specified.
Based on the reference line calculated based on the information in the specified first region, the image region including the image of the first region is rotated.
An image processing method, characterized in that a computer executes a process of outputting an image of an image region including at least a part of the image of the first region after rotation.

(Appendix 6) The area of the seal stamp is rotated based on the reference line calculated based on the information in the area of the seal stamp, and the area of the seal stamp is rotated based on the information of the positional relationship. The image processing method according to Appendix 5, wherein the process of extracting the first region in which the date can be included is further executed in the region of the seal stamp.

(Appendix 7) Pixel values in the first region are binarized based on a certain threshold value, and other values existing on a line connecting one value in the image after the binarization process are used. The image processing method according to Appendix 5 or 6, wherein the conversion process is further executed.

(Appendix 8) Among the line segments obtained as a result of the conversion process, the process of specifying the reference line is further executed based on the line segment group forming the closed region in the first region. The image processing method according to Appendix 7.

(Appendix 9) The area of the seal stamp included in the image is extracted, and the date is set in the extracted area of the seal stamp based on the information on the positional relationship between the area of the seal stamp set in advance and the area of the date position included in the seal stamp. And a specific part that identifies the first area that can contain
Based on the reference line calculated based on the information in the specified first region, the image region including the image of the first region is rotated, and at least the image of the first region after rotation is rotated. An image processing device characterized by having an extraction unit that outputs an image of an image area including a part thereof.

(Appendix 10) The extraction unit rotates the area of the seal stamp based on the reference line calculated based on the information in the area of the seal stamp, and rotates based on the information of the positional relationship. The image processing apparatus according to Appendix 9, further performing a process of extracting a first region in the stamp region, which may include a date, from the stamp region.

(Appendix 11) The extraction unit performs a binarization process on the pixel values in the first region based on a certain threshold value, and exists on a line connecting one of the values in the image after the binarization process. The image processing apparatus according to Appendix 9 or 10, further performing a process of converting other values to be performed.

(Appendix 12) The extraction unit further executes a process of specifying the reference line based on a group of line segments forming a closed region in the first region among the line segments obtained as a result of the conversion process. The image processing apparatus according to Appendix 11, which is characterized by the above.

(Appendix 13) To the computer
Extract the area of the seal included in the image and
The area of the seal stamp is rotated based on the reference line calculated based on the information in the area of the seal stamp.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the rotated seal stamp area where the date can be included is specified.
An image processing program characterized by executing a process of outputting an image of an image area including at least a part of an image of a specified area.

(Appendix 14) The area of the seal included in the image is extracted.
The area of the seal stamp is rotated based on the reference line calculated based on the information in the area of the seal stamp.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the rotated seal stamp area where the date can be included is specified.
An image processing method characterized in that a computer executes a process of outputting an image of an image area including at least a part of the image of the specified area.

(Appendix 15) The area of the seal included in the image is extracted.
An extraction unit that rotates the area of the seal based on a reference line calculated based on the information in the area of the seal.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the specific unit that identifies the first area in the rotated seal stamp area that can include the date. When,
An image processing apparatus including an extraction unit that outputs an image of an image area including at least a part of an image of a specified area.

55 Scanner 100,200 Image processing device 110,210 Communication unit 120,220 Input unit 130,230 Display unit 140,240 Storage unit 141,241 Positional information 150,250 Control unit 151,251 Acquisition unit 152 Specific unit 153,252 Extraction unit 154,253 Character recognition unit

Claims (9)

On the computer
Extract the area of the seal included in the image and
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the extracted area of the seal stamp that can contain the date is specified.
Based on the reference line calculated based on the information in the specified first region, the image region including the image of the first region is rotated.
An image processing program characterized by executing a process of outputting an image of an image region including at least a part of the image of the first region after rotation. The area of the seal is rotated based on the reference line calculated based on the information in the area of the seal, and the area of the seal is rotated based on the information of the positional relationship. The image processing program according to claim 1, further executing a process of extracting a first region in which a date included in the region can be included. The pixel values in the first region are binarized based on a certain threshold value, and the other values existing on the line connecting one value in the image after the binarization process are converted. The image processing program according to claim 1 or 2, wherein the image processing program is further executed. Among the line segments obtained as a result of the conversion process, the process of further specifying the reference line based on the line segment group forming the closed region in the first region is further executed. The image processing program according to claim 3. Extract the area of the seal included in the image and
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the extracted area of the seal stamp that can contain the date is specified.
Based on the reference line calculated based on the information in the specified first region, the image region including the image of the first region is rotated.
An image processing method, characterized in that a computer executes a process of outputting an image of an image region including at least a part of the image of the first region after rotation. The stamp area included in the image is extracted, and the date can be included in the extracted stamp area based on the information on the positional relationship between the preset stamp area and the date position area included in the stamp. A specific part that identifies the first area,
Based on the reference line calculated based on the information in the specified first region, the image region including the image of the first region is rotated, and at least the image of the first region after rotation is rotated. An image processing device characterized by having an extraction unit that outputs an image of an image area including a part thereof. On the computer
Extract the area of the seal included in the image and
The area of the seal stamp is rotated based on the reference line calculated based on the information in the area of the seal stamp.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the rotated seal stamp area where the date can be included is specified.
An image processing program characterized by executing a process of outputting an image of an image area including at least a part of an image of a specified area. Extract the area of the seal included in the image and
The area of the seal stamp is rotated based on the reference line calculated based on the information in the area of the seal stamp.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the first area in the rotated seal stamp area where the date can be included is specified.
An image processing method characterized in that a computer executes a process of outputting an image of an image area including at least a part of the image of the specified area. Extract the area of the seal included in the image and
An extraction unit that rotates the area of the seal based on a reference line calculated based on the information in the area of the seal.
Based on the information on the positional relationship between the preset area of the seal stamp and the area of the date position included in the seal stamp, the specific unit that identifies the first area in the rotated seal stamp area that can include the date. When,
An image processing apparatus including an extraction unit that outputs an image of an image area including at least a part of an image of a specified area.

Images