JP6402797B1 - Imaging apparatus, image acquisition method, and program - Google Patents

Abstract

A photographing apparatus is provided that can cope with photographing under more complicated conditions. An image acquisition unit that acquires an image, a screen detection unit that detects an area of a screen of an electronic device in a first image acquired by the image acquisition unit, and the electronic in the first image A parameter adjustment unit that adjusts an image brightness parameter based on the brightness of a screen area of the device; and the electronic device among images acquired by the image acquisition unit based on a parameter adjusted by the parameter adjustment unit A screen region image acquisition unit that acquires a second image that is an image of the screen region. [Selection] Figure 1

Description

  The present invention relates to a photographing apparatus, an image acquisition method, and a program.

There has been proposed a technique for dealing with a change in brightness of a photographed image due to an influence from the surroundings in a photographing apparatus in which a photographing object such as a stand-type scanner is separated from a camera (image acquisition unit).
For example, Patent Document 1 discloses a correction data generation apparatus that does not require a dedicated white reference sheet for generating correction data for a captured image. The correction data generation apparatus detects a non-blank portion that is a portion other than a blank image in the image indicated by the image data, and determines whether correction data can be generated based on the detection result. When it is determined that the correction data can be generated, the correction data generation device generates correction data based on the image data.

Japanese Patent Laid-Open No. 2006-144093

  It is preferable that a photographing apparatus in which the photographing object is separated from the camera can cope with photographing under more complicated conditions. For example, it is preferable that one photographing apparatus can cope with both photographing of a screen of an electronic device such as a smartphone and photographing of a document.

  An object of the present invention is to provide a photographing apparatus, an image acquisition method, and a program that can solve the above-described problems.

According to the first aspect of the present invention, an imaging device includes an image acquisition unit that acquires an image, and an image acquired by the image acquisition unit that is an image of an electronic device and a document . and among the image detecting unit that detects an area of the screen of the electronic device, and a parameter adjusting unit on the basis of the brightness of the area of the screen of the electronic device in the first image, to adjust the parameters of the brightness of the image, the A screen area image acquisition unit that acquires a second image that is an image of the area of the screen of the electronic device among the images acquired by the image acquisition unit based on the parameters adjusted by the parameter adjustment unit.

According to a second aspect of the present invention, the image acquisition method detects the area of the screen of the electronic apparatus of the first image A obtained image is an image obtained by photographing the electronic device and documents, the Based on the brightness of the screen area of the electronic device in the first image, the brightness parameter of the image is adjusted, and among the images obtained based on the adjusted parameter, the image of the screen area of the electronic device Including obtaining a second image.

According to a third aspect of the present invention, the programs, the to detect the area of the screen of the electronic apparatus of the first image A obtained image is an image obtained by photographing the electronic device and documents, The image brightness parameter is adjusted based on the brightness of the screen area of the electronic device in the first image, and the image of the screen area of the electronic device among the images obtained based on the adjusted parameter This is a program for acquiring the second image.

  According to the present invention, it is possible to cope with photographing under more complicated conditions.

It is a perspective view which shows the example of the schematic external shape of the imaging device which concerns on embodiment of this invention. It is a schematic block diagram which shows the structural example of the image acquisition part which concerns on the same embodiment. It is a schematic block diagram which shows the function structure of the imaging device which concerns on the same embodiment. It is a figure which shows the example of the area | region of the screen of the electronic device which the screen detection part which concerns on the embodiment detects. It is a figure which shows the example of the 2nd image which the screen area image acquisition part concerning the embodiment acquires. 6 is a flowchart illustrating an example of a processing procedure in which the photographing apparatus according to the embodiment acquires an image of a document and an image of a screen of an electronic device. It is a figure which shows the example of the minimum structure of the imaging device which concerns on this invention.

Hereinafter, although embodiment of this invention is described, the following embodiment does not limit the invention concerning a claim. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.
FIG. 1 is a perspective view illustrating an example of a schematic external shape of a photographing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the photographing apparatus 100 includes a mounting table 110, a support 120, an image acquisition unit 130, and an operation input unit 160. The mounting table 110 includes a guide 111. In FIG. 1, a smartphone 910 and a document 920 are mounted on the mounting table 110 as an example of the shooting target 900. The smartphone 910 corresponds to an example of an electronic device.

The imaging apparatus 100 is a stand-type scanner, and generates an image by imaging the imaging object 900 placed on the mounting table 110. The photographing apparatus 100 generates an image having brightness that allows image processing such as character recognition or barcode reading.
In particular, the photographing apparatus 100 can handle both photographing of a screen of an electronic device and photographing of a document. The image capturing apparatus 100 generates an image having brightness that allows image processing for each of the screen of the electronic device and the document while being placed on the mounting table 110 simultaneously with the electronic device and the document.

Since the photographing apparatus 100 can handle both the photographing of the screen of the electronic device and the photographing of the document, the user does not need to prepare a photographing device for each of the document and the electronic device. In this respect, the cost of the equipment can be reduced, and a space for installing the photographing apparatus is sufficient.
Further, the image capturing apparatus 100 generates an image having brightness that allows image processing for each of the screen of the electronic device and the document in a state where the electronic device and the document are simultaneously mounted on the mounting table 110. The work of placing the document and the electronic device on the placement place can be done only once. In this respect, the burden on the user can be reduced.

The mounting table 110 is a table on which the object to be imaged 900 is mounted. The imaging apparatus 100 captures an image of the imaging object 900 placed on the mounting table 110 by performing imaging using a predetermined range excluding the end portion of the upper surface of the mounting table 110 as an angle of view.
The guide 111 is a guide for placing a document in accordance with the orientation of an image photographed by the photographing apparatus 100. When placing a document on the placing table 110, the user can place the side of the document in contact with the guide 111 so that the length and width of the document are aligned with the length and width of the captured image.

However, the mounting table 110 may not be configured as a part of the imaging apparatus 100. For example, the photographing apparatus 100 may be used while standing on a desk, and the user may place the photographing object 900 in an area where the photographing apparatus 100 on the desk can photograph.
The photographing apparatus 100 is not limited to the stand type scanner, and may be any photographing apparatus in which the photographing object and the photographing unit are separated from each other. For example, the image acquisition unit 130 may be configured to be suspended from the ceiling above the mounting table 110.

The support column 120 is provided upright on the mounting table 110 and supports the image acquisition unit 130. Accordingly, the support column 120 fixes the image acquisition unit 130 at a predetermined distance from the upper surface of the mounting table 110.
The image acquisition unit 130 faces the mounting table 110, is supported by the support column 120, and images the imaging target object 900 mounted on the mounting table 110. The image acquisition unit 130 acquires an image of the shooting target 900 as image data by shooting the shooting target 900.

  In particular, the image acquisition unit 130 acquires a first image obtained by photographing the electronic device and the document in a state where the electronic device and the document are mounted on the mounting table 110. The first image referred to here is an image acquired by the image acquisition unit 130 in a state before brightness adjustment for image acquisition of an electronic device screen to be described later. The image acquisition unit 130 captures images even after the brightness adjustment, and acquires an image that can read the screen of the electronic device.

FIG. 2 is a schematic configuration diagram illustrating a configuration example of the image acquisition unit 130. In the example of FIG. 2, the image acquisition unit 130 includes a mirror 131, a lens group 132, and an image sensor 133.
The mirror 131 reflects the light from the object 900 placed on the mounting table 110 toward the lens group 132.
The lens group 132 refracts the light from the photographing object 900 that is reflected by the mirror 131 and enters the lens group 132, and forms an image of the photographing object 900 on the photographing surface of the image sensor 133.

The image sensor 133 converts light incident on the imaging surface into an electrical signal. The image acquisition unit 130 amplifies this electric signal with an amplifier and digitizes it, thereby generating a captured image as image data.
In particular, the image sensor 133 converts light from the photographing object 900 into an electrical signal in a state where the photographing object 900 is placed on the mounting table 110. The image acquisition unit 130 generates an image of the shooting target 900 based on the electrical signal.

  FIG. 3 is a schematic block diagram illustrating a functional configuration of the image capturing apparatus 100. The imaging apparatus 100 includes a display unit 170, a storage unit 180, and a control unit 190 in addition to the units shown in FIGS. The control unit 190 includes a screen detection unit 191, a parameter adjustment unit 192, a screen area image acquisition unit 193, an insufficient brightness processing unit 194, and an image processing unit 195.

The operation input unit 160 includes an input device such as a push button and receives a user operation. For example, the operation input unit 160 receives a shutter operation that instructs the image acquisition unit 130 to perform shooting. Alternatively, the photographing apparatus 100 may automatically detect the placement of the photographing object on the placing table 110 and automatically perform photographing.
The display unit 170 includes a display screen such as a liquid crystal panel, and displays various images. In particular, the display unit 170 displays an alarm message when the brightness of the screen area of the electronic device in the image captured by the image acquisition unit 130 cannot be increased to a predetermined level or higher.
However, the method by which the photographing apparatus 100 outputs an alarm is not limited to the method in which the display unit 170 displays a message. For example, the photographing apparatus 100 may include a speaker and output a warning by voice in addition to or instead of displaying a warning message.

The storage unit 180 stores various data. The storage unit 180 is configured using a storage device provided in the imaging apparatus 100.
The control unit 190 controls each unit of the imaging apparatus 100 to perform various processes. The control unit 190 is configured by a CPU (Central Processing Unit) provided in the photographing apparatus 100 reading out a program from the storage unit 180 and executing the program.

The screen detection unit 191 detects a screen area of the electronic device from the first image acquired by the image acquisition unit 130.
FIG. 4 is a diagram illustrating an example of the screen area of the electronic device detected by the screen detection unit 191. In FIG. 4, a portion including the image of the electronic device in the first image is shown. The screen detection unit 191 detects a screen area in the image of the electronic device, and detects a rectangular area A11 including the detected screen as a screen area of the electronic device. The region A11 is the smallest region of the rectangular regions whose vertical and horizontal directions match the vertical and horizontal directions of the first image and that includes the entire screen area of the electronic device.

However, the area detected by the screen detection unit 191 is not limited to this. For example, the screen detection unit 191 may detect the screen area itself of the electronic device.
Further, the method for detecting the screen area of the electronic device by the screen detection unit 191 is not limited to a specific method. For example, the storage unit 180 stores in advance an image template or feature amount of the electronic device, the screen detection unit 191 detects the image of the electronic device by pattern matching, and further detects the detected image of the electronic device. Of these, the screen area may be specified. Or you may make it the screen detection part 191 detect the area | region of the screen of an electronic device by performing machine learning, such as deep learning (Deep Learning), for example.

  When the screen detection unit 191 detects an area of the screen of the electronic device in the first image acquired by the image acquisition unit 130, the parameter adjustment unit 192 determines the brightness of the image based on the brightness of the area. Adjust the parameters. Examples of parameters to be adjusted by the parameter adjustment unit 192 include, but are not limited to, an exposure time and a gain when an electric signal from the image sensor 133 is amplified.

The screen area image acquisition unit 193 acquires a second image. The second image here is an image of the screen area of the electronic device among the images acquired by the image acquisition unit 130 based on the parameters adjusted by the parameter adjustment unit 192.
FIG. 5 is a diagram illustrating an example of the second image acquired by the screen area image acquisition unit 193.
In the example of FIG. 5, the screen area image acquisition unit 193 acquires, as a second image, an image of an area corresponding to the area A <b> 11 of FIG. 4 among images captured by the image acquisition unit 130 after parameter adjustment by the parameter adjustment unit 192. ing. As the parameter adjustment unit 192 adjusts the parameters, the second image is an image brighter than the screen area of the electronic device in the first image.
In the example of FIG. 5, the electronic device displays a barcode on the screen. The second image is an image that is brighter than the area of the screen of the electronic device in the first image, so that the image is more suitable for barcode reading.

For example, after the parameter adjustment unit 192 adjusts the parameters, the image acquisition unit 130 captures the area of the screen of the electronic device and the other areas such as capturing at the same angle of view as when capturing the first image. You may make it acquire the image containing. In this case, the screen area image acquisition unit 193 cuts out the area of the screen of the electronic device from the images acquired by the image acquisition unit 130 as the second image.
Alternatively, the image acquisition unit 130 may generate image data of the screen area of the electronic device, such as zooming up to the screen of the electronic device, or converting only the screen region of the electronic device into image data. . In this case, the screen area image acquisition unit 193 acquires the image data generated by the image acquisition unit 130 as the second image.

When the brightness shortage processing unit 194 determines that the brightness of the second image is darker than the threshold value, it performs a predetermined process. For example, when the brightness shortage processing unit 194 determines that the brightness of the second image is darker than the threshold, the warning message indicating that the screen of the electronic device is dark is displayed on the display unit 170.
Here, it is conceivable that one of the causes of the dark screen of the electronic device is that the electronic device enters the power saving mode to darken the screen or turn off the screen. In this case, the user who refers to the warning message displayed on the display unit 170 operates the electronic device to return the screen to a bright state, and the image acquisition unit 130 captures the image again, so that the screen of the electronic device is bright. An image can be obtained.
However, the processing performed by the insufficient brightness processing unit 194 is not limited to outputting an alarm message. For example, when the brightness deficient processing unit 194 can directly control the electronic device, a control signal may be transmitted to the electronic device so that the screen of the electronic device is brightened.

  Further, in addition to or instead of determining whether the brightness of the second image is darker than the threshold (first threshold), the brightness shortage processing unit 194 determines whether the brightness of the second image is the threshold (first). It may be determined whether it is brighter than (two threshold values). For example, when shooting is performed using a high-sensitivity camera in a dark environment, the screen of the electronic device may be too bright. The insufficient brightness processing unit 194 may detect a case where the screen of the electronic device is too bright.

When it is determined that the brightness of the second image is brighter than the second threshold, the insufficient-brightness processing unit 194 may perform a predetermined process as a process when the screen of the electronic device is bright. . For example, the insufficient brightness processing unit 194 may cause the display unit 170 to display an alarm message indicating that the screen of the electronic device is too bright. Alternatively, when the brightness deficient processing unit 194 can directly control the electronic device, a control signal may be transmitted to the electronic device so that the screen of the electronic device is darkened. Since the screen of the electronic device becomes dark according to the processing performed by the insufficient brightness processing unit 194, the image acquisition unit 130 captures an image of the screen of the electronic device with brightness that the image processing unit 195 can process. obtain.
As described above, the insufficient brightness processing unit 194 corresponds to an example of an inappropriate brightness processing unit, and performs predetermined processing when it is determined that the brightness of the second image is outside the predetermined range.

The image processing unit 195 performs image processing such as character recognition and barcode reading.
Further, the image processing unit 195 may perform image processing for attaching the second image to the first image in addition to or instead of image processing such as character recognition and barcode reading. For example, the image processing unit 195 may replace the portion corresponding to the second image (the area of the screen of the electronic device) in the first image with the second image.
The image processing unit 195 attaches the second image to the first image, thereby obtaining one image that can be read from both the document and the screen of the electronic device. In other words, the image file can be unified. Thus, the user only has to manage the images combined into one, and the burden on the user can be reduced in this respect.

Furthermore, the image processing unit 195 may perform tampering prevention processing such as adding an electronic signature to an image obtained by pasting the second image onto the first image.
The image processing unit 195 performs a falsification preventing process on the image obtained by pasting the second image on the first image, and the obtained image is placed on the mounting table 110 simultaneously with the document and the electronic device. It can be shown that the image is placed and photographed. In this regard, the image processing unit 195 can indicate the synchronization between document shooting and electronic device screen shooting. For example, the user can use, as evidence indicating the date when the screen of the electronic device was displayed, an image captured by the imaging apparatus 100 of the screen of the electronic device and an article on which the date is written such as newspaper.

Next, the operation of the photographing apparatus 100 will be described with reference to FIG.
FIG. 6 is a flowchart illustrating an example of a processing procedure in which the photographing apparatus 100 acquires a document image and an electronic device screen image. In FIG. 6, the case where the electronic device is a smartphone will be described as an example, but the electronic device captured by the imaging device 100 is not limited to the smartphone. For example, the electronic device photographed by the photographing apparatus 100 may be a small tablet terminal device.

  In the process of FIG. 6, the image acquisition unit 130 captures an image of the mounting table 110 (step S111). When a document and a smartphone are placed on the mounting table 110, the document and the smartphone are reflected in an image captured by the image acquisition unit 130. However, in the image before the parameter adjustment unit 192 adjusts the parameter, the image on the smartphone screen is dark, and the image processing unit 195 cannot perform image processing on the image on the smartphone screen.

Next, the image processing unit 195 performs image processing such as character recognition on the document image shown in the image obtained in step S111 (step S112).
In addition, the screen detection unit 191 performs a process of detecting a region in which the smartphone is captured from the image obtained in step S111 (step S113). And the screen detection part 191 determines whether the detection of the smart phone was successful (step S114). When it is determined that the detection has failed (step S114: NO). The process of FIG. 6 is terminated. In this case, it is conceivable that no smartphone is placed on the placement table 110.

On the other hand, when it determines with the detection of a smart phone having been successful (step S114: YES), the screen detection part 191 cuts out the image of the smart phone screen from the area | region where the smart phone is reflected (step S121).
The parameter adjustment unit 192 detects the brightness of the image of the smartphone screen cut out by the screen detection unit 191 (step S122). For example, the parameter adjustment unit 192 calculates the brightness of the entire image of the smartphone screen based on the pixel value of the image of the smartphone screen.

Next, the parameter adjustment unit 192 determines whether or not the brightness detected in step S122 is appropriate (step S123). For example, the parameter adjustment unit 192 determines whether or not the brightness detected in step S122 is included in a predetermined range.
If it is determined that the brightness is appropriate (step S123: YES), the image processing unit 195 performs processing such as reading a barcode displayed on the screen, for example, on the screen image of the smartphone (step S123). S131).

On the other hand, when it is determined that the brightness detected in step S122 is not appropriate (step S123: NO), the parameter adjustment unit 192 determines whether the brightness detected in step S122 is equal to or greater than an error threshold. (Step S141). The error threshold here is a threshold set in advance as a brightness threshold that is difficult to cope with by setting parameters.
If it is determined that the brightness detected in step S122 is greater than or equal to the error threshold (step S141: YES), the parameter adjustment unit 192 changes the shooting parameter (step S151). For example, when the image on the smartphone screen is dark, the parameter adjustment unit 192 increases the exposure time and increases the gain value when the electric signal from the image sensor 133 is amplified.
Then, the image acquisition unit 130 acquires an image by imaging the mounting table 110 under the conditions of the imaging parameters changed by the parameter adjustment unit 192 in step S151 (step S152).
After step S152, the process returns to step S121.

  On the other hand, if it is determined that the brightness detected in step S122 is smaller than the error threshold (step S141: NO), the low brightness processing unit 194 indicates that the smartphone screen brightness is insufficient. A message is displayed (step S161). And after waiting for progress of predetermined time (step S162), it returns to step S121. While waiting for the time in step S162, the user performs an operation to brighten the screen of the smartphone, so that the image acquisition unit 130 captures an image of the smartphone screen with brightness that the image processing unit 195 can process. obtain.

As described above, the screen detection unit 191 detects the screen area of the electronic device in the first image captured by the image acquisition unit 130. The parameter adjustment unit 192 adjusts the brightness parameter of the image based on the brightness of the screen area of the electronic device in the first image. The screen area image acquisition unit 193 acquires a second image that is an image of the area of the screen of the electronic device among images captured by the image acquisition unit 130 based on the parameters adjusted by the parameter adjustment unit 192.
Thereby, the imaging device 100 can handle both shooting of a screen of an electronic device such as a smartphone and shooting of a document. In this respect, the photographing apparatus 100 can cope with photographing under more complicated conditions.

The image acquisition unit 130 acquires a first image obtained by photographing the electronic device and the document.
As a result, the photographing apparatus 100 obtains an image with appropriate brightness for both the screen image of the electronic device and the image of the document in a state where the electronic device and the document are simultaneously mounted on the mounting table 110. It is done. The burden on the user is that it is not necessary for the user to replace the electronic device after placing the electronic device on the mounting table 110, or to replace the electronic device after placing the document on the mounting table 110. It's small.

In addition, when the brightness shortage processing unit 194 determines that the brightness of the second image is outside the predetermined range, the processing is performed in a predetermined manner.
For example, when the brightness shortage processing unit 194 determines that the brightness of the second image is darker than the threshold value, the predetermined process is performed. The screen of the electronic device becomes brighter according to the processing performed by the insufficient brightness processing unit 194, so that the image acquisition unit 130 captures an image of the screen of the electronic device with brightness that the image processing unit 195 can process. obtain.
As described above, in addition to or instead of the case where the brightness shortage processing unit 194 determines that the brightness of the second image is darker than the threshold value, the brightness of the second image is determined to be brighter than the threshold value. In such a case, a predetermined process may be performed. The screen of the electronic device becomes brighter according to the processing performed by the insufficient brightness processing unit 194, so that the image acquisition unit 130 captures an image of the screen of the electronic device with brightness that the image processing unit 195 can process. obtain.

Further, the image processing unit 195 pastes the second image on the first image.
The image processing unit 195 pastes the second image to the first image, thereby obtaining one image that can read both the document and the screen of the electronic device. Thus, the user only has to manage the images combined into one, and the burden on the user can be reduced in this respect.

Further, the image processing unit 195 performs a falsification preventing process on the image in which the second image is pasted on the first image.
The image processing unit 195 performs a falsification preventing process on the image obtained by pasting the second image on the first image, and the obtained image is placed on the mounting table 110 simultaneously with the document and the electronic device. It can be shown that the image is placed and photographed. For example, the user can use, as evidence indicating the date when the screen of the electronic device was displayed, an image captured by the imaging apparatus 100 of the screen of the electronic device and an article on which the date is written such as newspaper.

Next, the minimum configuration of the present invention will be described with reference to FIG.
FIG. 7 is a diagram showing an example of the minimum configuration of the photographing apparatus according to the present invention. The imaging apparatus 10 illustrated in FIG. 7 includes an image acquisition unit 11 that acquires an image, a screen detection unit 12, a parameter adjustment unit 13, and a screen region image acquisition unit 14.
With this configuration, the screen detection unit 12 detects the screen area of the electronic device in the first image acquired by the image acquisition unit 11. The parameter adjustment unit 13 adjusts the brightness parameter of the image based on the brightness of the screen area of the electronic device in the first image. The screen area image acquisition unit 14 acquires a second image that is an image of the area of the screen of the electronic device among the images acquired by the image acquisition unit 11 based on the parameters adjusted by the parameter adjustment unit 13.
Thereby, the imaging device 10 can cope with both the imaging of the screen of the electronic device and the imaging of the document. In this respect, the photographing apparatus 10 can cope with photographing under more complicated conditions.

It should be noted that a program for realizing all or part of the functions of the control unit 190 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may perform the process of. Here, the “computer system” includes an OS and hardware such as peripheral devices.
The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 100 Image pick-up device 110 Mounting stand 111 Guide 120 Support | pillar 130 Image acquisition part 160 Operation input part 170 Display part 180 Storage part 190 Control part 191 Screen detection part 192 Parameter adjustment part 193 Screen area image acquisition part 194 Insufficient brightness processing part 195 Image Processing part

Claims (6)

An image acquisition unit for acquiring images;
A screen detector for detecting a region of a screen of the electronic apparatus of the first image is an image obtained by photographing the electronic device and the document to an image by the image acquisition unit has acquired,
A parameter adjustment unit that adjusts the brightness parameter of the image based on the brightness of the screen area of the electronic device in the first image;
A screen region image acquisition unit that acquires a second image that is an image of a region of the screen of the electronic device among the images acquired by the image acquisition unit based on the parameters adjusted by the parameter adjustment unit;
An imaging device comprising: The imaging device according to claim 1, further comprising a processing unit for inappropriate brightness when performing a predetermined process when it is determined that the brightness of the second image is outside a predetermined range. An image processing unit that pastes the second image on the first image;
The imaging device according to claim 1 or 2 . The image processing unit performs a falsification preventing process on an image obtained by pasting the second image on the first image.
The imaging device according to claim 3 . A acquired image to detect an area of the screen of the electronic apparatus of the first image is an image obtained by photographing the electronic device and documents,
Adjusting the brightness parameter of the image based on the brightness of the screen area of the electronic device in the first image;
Obtaining a second image that is an image of an area of the screen of the electronic device among images obtained based on the adjusted parameters;
An image acquisition method including the above. On the computer,
A captured image is detected the area of the screen of the electronic apparatus of the first image is an image obtained by photographing the electronic device and documents,
Based on the brightness of the screen area of the electronic device in the first image, adjust the brightness parameter of the image,
A program for acquiring a second image, which is an image of a screen area of the electronic device, among images obtained based on the adjusted parameters.

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