JP2010061686A - Image processor, image processing method, computer program for attaining function thereof, and recording medium recorded with computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a load of processing for detecting a change of an image, and a time required for the processing. <P>SOLUTION: This image processor for determining the dissimilarity between a reference image and a marked image includes: a determination part for determining the dissimilarity between a comparing image comprising one or the whole of the marked image and an area corresponding to the comparing image in the reference image; a determination part for determining which of the one or the whole of the marked image is made to serve as the next comparing image, based on a result of the determination; and an acquisition part for acquiring the comparing image from the marked image, based on the determination. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for determining the difference between two images.

  2. Description of the Related Art An image display system that transmits image data from a computer to an external output device such as a projector via a LAN and displays the image is known. As such an image display system, in order to reduce the amount of data transferred from a computer to an external output device, a technique for transferring only a part of image data including a portion in which an image has changed is known (Patent Document). 1).

JP 2005-33763 A

  However, in order to detect a change in the image, image data is transferred from the VRAM to the RAM in the computer, and image comparison processing is performed by the CPU. Had to spend a lot of time to transfer.

  The present invention has been made in order to solve at least a part of the above-described conventional problems, and an object thereof is to reduce the processing load for detecting a change in an image and the time required for the processing.

  In order to solve at least a part of the above problems, the present invention employs the following aspects.

  A first aspect of the present invention provides an image processing apparatus that determines the difference between a reference image and a target image. The image processing device according to the first aspect of the present invention includes: a determination unit that determines whether a comparison image including a part or all of the target image is different from a region corresponding to the comparison image in the reference image; And a determination unit that determines whether the next comparison image is to be a part or all of the attention image, and an acquisition unit that acquires the comparison image from the attention image based on the determination.

  According to the image processing apparatus of the first aspect of the present invention, the comparison image as a part or all of the target image is compared with the reference image to determine the difference, so that the entire target image is compared with the reference image. Rather than doing this, it is possible to detect changes in the image while reducing the burden on the computer and the time required for processing.

  The image processing apparatus according to the first aspect of the present invention further includes an update unit that updates the reference image based on the determination result, and the determination unit determines that the comparison image and the reference image are different from each other. In this case, the difference between the reference image updated by the updating unit and the next comparison image may be determined. In this case, after determining the difference between the reference image and the comparison image, it is possible to determine the difference between the updated reference image and the next comparison image.

  In the image processing device according to the first aspect of the present invention, when the determination unit determines that the comparison image and the reference image are the same, the determination unit performs a subsequent comparison on a part of the target image. If it is determined that the images are different from each other, the entire image of interest may be the next comparative image. In this case, after determining the difference between the comparison image and the reference image, the determination unit can further determine the difference between the comparison image that is a part or all of the target image and the reference image based on the determination result.

  In the image processing device according to the first aspect of the present invention, when the comparison image determined to be different by the determination unit is all of the attention images, the update unit determines a reference image using the comparison image. It may be updated. In this case, the reference image can be updated using the comparison image acquired by the acquisition unit.

  In the image processing device according to the first aspect of the present invention, when the part of the target image is a comparative image, the determining unit is one of the divided regions in the target image divided into a plurality of divided regions. May be used as a comparative image. In this case, the determination unit can determine which one of a plurality of divided regions or all of the target image is used as the comparison image.

  In the image processing device according to the first aspect of the present invention, when the determination unit determines that the comparison image including one of the divided regions is the same as the reference image, the determination unit A divided area different from the divided area used for the determination may be used as the next comparative image. In this case, the determination unit can determine the difference between the reference image and a region different from the determined divided region.

  In the image processing device according to the first aspect of the present invention, the image processing device determines a difference between an overall attention image constituted by a plurality of the attention images and an overall reference image constituted by the plurality of reference images. May be. In this case, the image processing apparatus determines the difference between the global image of interest and the global reference image by determining the difference between each of the global images of interest and the reference images of the global reference image. be able to.

  In the image processing apparatus according to the first aspect of the present invention, when the determination unit determines that the comparison image and the reference image are different in at least one or more attention images constituting the overall attention image, The update unit may update all reference images constituting the overall reference image. In this case, when at least a part of the images of the overall attention image and the overall reference image are different, the overall reference image can be updated.

  In the image processing device according to the first aspect of the present invention, the acquisition unit may select a target image from a plurality of images arranged in time series. In this case, it is possible to detect a change in images arranged in time series by determining the difference between the target image and the reference image.

  The image processing apparatus according to the first aspect of the present invention may further include a transmission unit that transmits the reference image to the outside. In this case, the reference image updated by the updating unit or the entire reference image composed of a plurality of reference images can be transmitted to the outside.

  The present invention can be realized in various modes, and can be realized as an image processing method for executing image processing, for example. Also, the present invention can be realized in the form of a computer program for realizing the functions of the apparatus, a recording medium on which the computer program is recorded, and the like.

1 is an explanatory diagram showing a schematic configuration of a video providing system to which an image processing apparatus is applied as one embodiment of the present invention. FIG. 2 is a block diagram showing an internal configuration of a personal computer 100. FIG. It is explanatory drawing which showed typically about area | region frame data. It is explanatory drawing which showed typically about the area | region which subdivided the block area | region further. It is explanatory drawing which showed typically about the state of the block area | region which CPU sets. It is the flowchart which showed the procedure of the operation | movement of a video provision system. It is the flowchart which showed the procedure which acquires comparison object image data. It is the flowchart which showed the procedure which acquires whole reference | standard image data. It is explanatory drawing which showed typically comparison object image data and whole reference | standard image data. It is explanatory drawing which showed typically the comparison object image data and whole reference | standard image data which were acquired by CPU at the time of an inactive state. It is explanatory drawing which showed typically the comparison object image data and whole reference | standard image data which were acquired by CPU at the time of a partial active state. It is explanatory drawing which showed typically the state which acquires whole reference | standard image data from comparison object image data. It is explanatory drawing which showed typically the state which acquires whole reference | standard image data from frame image data. It is explanatory drawing about the block area | region and flip area | region in a modification.

  Hereinafter, an image processing apparatus according to the present invention will be described based on examples with reference to the drawings.

A. Example:
A-1. Overall configuration of the image processing device:
FIG. 1 is an explanatory diagram showing a schematic configuration of a video providing system to which an image processing apparatus is applied as one embodiment of the present invention. The video providing system 1000 includes a personal computer 100, a projector 400, and a screen 500. In the video providing system 1000, the projector 400 receives image data displayed on the display 200 included in the personal computer 100 and projects and displays it on the screen 500.

  In the present embodiment, image data is exchanged between the personal computer 100 and the projector 400 via the LAN cable 600. The data exchange may be performed by USB, wireless LAN, Bluetooth (registered trademark) or the like in addition to the LAN cable. The projector 400 drives a liquid crystal panel (not shown) based on the received image data, thereby modulating illumination light emitted from the light source and projecting and displaying an image. The projector 400 is not limited to a liquid crystal panel, and an arbitrary light modulation element can be used. For example, a DMD (Digital Micromirror Device: registered trademark of US TI) can be used.

  FIG. 2 is a block diagram showing the internal configuration of the personal computer 100. The personal computer 100 includes a memory 110, a CPU 120, a video card 130, an image data storage unit 140, an input interface 150, and an output interface 160.

  The CPU 120 is a central processing unit and controls the entire operation of the personal computer 100. The memory 110 includes a ROM and a RAM, and functions as a reference image storage unit 111, a comparison target image storage unit 112, or a frame information storage unit 113, which will be described later, as well as an image acquisition module 114, an image determination module 115, and an area determination module 116. And an image transmission module 117 and an image reproduction module 118.

  The reference image storage unit 111 and the comparison target image storage unit 112 are areas on a memory for storing image data, and the frame information storage unit 113 is an area on a memory for storing area frame data described later. . The image acquisition module 114, the image determination module 115, the region determination module 116, the image transmission module 117, and the image reproduction module 118 are programs for causing the CPU 120 to execute specific processing. In the present embodiment, software implementation is shown, but it can also be realized by hardware using an integrated circuit or the like.

  The video card 130 includes a VRAM (Video RAM) 131 used as a frame memory. In the VRAM 131, image data for one frame of an image displayed on the display 200 can be drawn. The image data storage unit 140 is a storage device such as a hard disk drive, and stores moving image data including a plurality of frame image data.

  The input interface 150 is connected to the keyboard 300 and provides input data from the keyboard 300 to the CPU 120. The output interface 160 is connected to the projector 400 via the LAN cable 600 and enables transmission of image data from the personal computer 100 to the projector 400.

  By executing the image acquisition module 114, the CPU 120 functions as an acquisition unit that duplicates the image data drawn in the VRAM 131 and stores it in the reference image storage unit 111 and the comparison target image storage unit 112. The CPU 120 functions as a determination unit that determines the difference between the overall reference image data and the comparison target image data by executing the image determination module 115. The CPU 120 functions as a determination unit that determines the range of image data to be copied from the image data drawn in the VRAM 131 based on the area frame data described later by executing the area determination module 116. By executing the image transmission module 117, the CPU 120 functions as a transmission unit that transmits the image data stored in the reference image storage unit 111 to an external device via the input interface 150. The CPU 120 displays the image on the display 200 by executing the image reproduction module 118 and drawing the image data stored in the image data storage unit 140 in the VRAM 131.

A-2. Image acquisition method based on region frame data:
A method for specifying a range of an image to be duplicated from image data drawn in the VRAM 131 based on the region frame data will be described. FIG. 3 is an explanatory diagram schematically showing region frame data. The area frame data Bx shown in FIG. 3B has an area corresponding to the frame image data Fx drawn in the VRAM 131 shown in FIG. 3C, and indicates a range of image data to be copied from the frame image data Fx. The area frame data Bx includes twelve block areas B11 to B34 that divide the frame image data of the VRAM 131. The CPU 120 copies the image data corresponding to the block areas B11 to B34 in the frame image data Fx drawn in the VRAM 131 with reference to the area frame data Bx, and stores it in the comparison target image storage unit 112.

  As shown in FIG. 3A, the comparison target image storage unit 112 stores the comparison target image data Hx copied from the frame image data Fx drawn in the VRAM 131 for each of the block areas B11 to B34. The comparison target image data Hx is composed of 12 pieces of comparison image data hx for each of the block areas B11 to B34. In this embodiment, the image represented by the comparison image data hx is a comparison image in the claims. In this embodiment, the image data stored in the reference image storage unit 111 is referred to as overall reference image data, and the image data for each block area constituting the overall reference image data is referred to as reference image data. The image that appears by this reference image data is the reference image in the claims. The image based on the frame image data Fx drawn in the VRAM 131 is the entire attention image in the claims, and the image corresponding to one block area is the attention image.

  FIG. 4 is an explanatory diagram schematically showing an area obtained by further subdividing the block area. As shown in FIG. 4B, each of the block areas B11 to B34 constituting the area frame data Bx further includes four flip areas X (1) to X (4). FIG. 4A shows comparison target image data Hy in which only the range of the flip area X (1) is duplicated in the frame image data Fx drawn in the VRAM 131. As shown in the figure, there is no image data in the area other than the flip area X (1). The flip regions X (1) to X (4) are divided regions in the claims.

  FIG. 5 is an explanatory diagram schematically showing the state of the block area set by the CPU. Each block area in the area frame data Bx is set to either an active state or an inactive state for each block area by the CPU 120 as shown in FIG. In the active state, the CPU 120 sets a block area having a difference in image data in comparison between the comparison target image data and the overall reference image data for each block area. On the other hand, the inactive state is set by the CPU 120 for a block area in which there is no difference in image data.

  In this embodiment, in the block area set as active by the CPU 120, the image data of the entire block area is copied from the frame image data Fx drawn in the VRAM 131 to obtain comparison image data, and the block set in the inactive state. In the region, only one range of the flip regions X (1) to X (4) is duplicated and used as comparison image data.

  For example, when the block areas B21, B23, and B34 are set in an active state and the other block areas are set in an inactive state as shown in FIG. 5A by the CPU 120, the areas shown in FIG. The frame image data Fx is duplicated to create comparison target image data. FIG. 5B shows the created comparison target image data Hz. In the block areas B21, B23, and B34, an image of the entire block area exists, but in the other block areas, only the area corresponding to the flip area X (2) exists.

A-3. Operation of the image processing device:
The operation of the video providing system to which the image processing apparatus according to the present invention is applied will be described. FIG. 6 is a flowchart showing an operation procedure of the video providing system. FIG. 7 is a flowchart showing a procedure for acquiring comparison target image data. FIG. 8 is a flowchart showing a procedure for acquiring the overall reference image data. FIG. 9 is an explanatory diagram schematically showing comparison target image data and overall reference image data. The CPU 120 sequentially draws the image data stored in the image data storage unit 140 in the VRAM 131 and continuously displays it on the display 200. The CPU 120 duplicates the frame image data stored in the VRAM 131 and stores it in the reference image storage unit 111 as the entire reference image data S1 shown in FIG. 9A (step S102).

  The CPU 120 transmits the entire reference image data S1 stored in the reference image storage unit 111 from the output interface 160 to the projector 400 via the LAN cable 600 (step S104). The projector 400 projects and displays an image on the screen 500 based on the received overall reference image data S1.

  The CPU 120 sets all the block areas to the active state (step S106). The CPU 120 sets i = 1 as an initial value to a counter i that can store an integer of 1 to 4 (step S108). This counter i can be incremented by 1 and the next 4 will return to 1. The integer i stored in the counter i corresponds to the flip area X (i) (i = 1 to 4). The CPU 120 refers to the integer i and determines a flip area X (i) that is a range for acquiring image data.

  The CPU 120 executes comparison target image acquisition processing (step S120). The comparison target image acquisition process will be described with reference to FIG. If the CPU 120 determines that all the block areas are set to the active state (step S121: YES), the image data of the entire area is copied for each block area from the frame image data in the VRAM, and the comparison target image is stored. The data is stored in the unit 112 (step S122). When the CPU 120 determines that all the block areas are not in the active state (step S121: NO) and are all set in the inactive state (step S123: YES), the flip area X (i) (i = 1 to 1). The frame image data in the VRAM corresponding to 4) is duplicated and stored in the comparison target image storage unit 112 (step S124). Thereafter, i is incremented (step S125).

  When the CPU 120 determines that the block areas set in the active state and the inactive state are mixed (step S123: NO), the image data of the entire area is copied in the block area set in the active state, and the comparison target image For the block area stored in the storage unit 112 (step S126) and set to the inactive state, the frame image data in the VRAM corresponding to the flip area X (i) (i = 1 to 4) is copied and compared. The image is stored in the target image storage unit 112 (step S127). Thereafter, i is incremented (step S128).

  When all the block areas are set in the active state in step S106, the CPU 120 duplicates the entire frame image data F2 stored in the VRAM 131 as shown in FIG. The image data is H2.

  The CPU 120 compares the comparison target image data H2 with the overall reference image data S1, and determines whether the images are different (step S132). Specifically, the CPU 120 obtains the pixel value of the comparison image data h2 for each block area constituting the comparison target image data H2 and the pixel value of the reference image data s1 for each block area constituting the overall reference image data S1. The presence or absence of a difference is determined by comparison.

  If the CPU 120 determines that there is no block area having a difference between the comparison target image data H2 and the overall reference image data S1 (step S134: NO), the CPU 120 sets all the block areas to an inactive state (step S162). ).

  CPU120 complete | finishes a process, for example, when the command which complete | finishes a process is received (step S172: YES). If there is no instruction to end or if the process is not ended due to receiving an instruction to continue the process (step S172: NO), the comparison target image acquisition process is executed again (step S120).

  FIG. 10 is an explanatory diagram schematically showing comparison target image data and overall reference image data acquired by the CPU in the inactive state. Since all the block areas are set in an inactive state by the CPU 120 in step S162, as shown in FIG. 10B, the CPU 120 flips the flip area X (1) of the frame image data F3 in the VRAM 131 in all the block areas. Is copied to obtain comparison target image data H3 (step S124). After setting i = 2 (step S125), the CPU 120 compares the comparison target image data H3 with the overall reference image data S1 (step S132). If the CPU 120 determines that the flip area X (1) of the block area B23 is different from the overall reference image data S1 (step S134: YES), it executes an overall reference image acquisition process described later (step S140).

  The overall reference image acquisition process will be described with reference to FIG. If the CPU 120 determines that all the block areas are set to the active state (step S141), the CPU 120 duplicates the comparison target image data and stores it in the reference image storage unit 111 as the entire reference image data (step S141). S142). When the CPU 120 determines that all the block areas are not in the active state (step S141: NO) and all are set in the inactive state (step S143: YES), the CPU 120 copies the frame image data drawn in the VRAM 131. In step S144, the image data is stored in the reference image storage unit 111 to be the entire reference image data.

  If the CPU 120 determines that the block areas set in the active state and the inactive state are mixed (step S143: NO), the CPU 120 copies the comparison image data and stores the reference image in the block area set in the active state. The image data is stored in the unit 111 as reference image data (step S146). In the block area set to the inactive state, the CPU 120 duplicates the image data corresponding to the block area out of the frame image data drawn in the VRAM 131 and stores it in the reference image storage unit 111 to store the reference image data. (Step S147). The CPU 120 creates overall reference image data by combining the two reference image data.

  Since the comparison target image data H3 in FIG. 10 is image data obtained by the CPU 120 in a state where all the block areas are set to the inactive state, the CPU 120 duplicates the frame image data F4 drawn in the VRAM 131. The whole reference image data S4. (Step S144). CPU 120 transmits new overall reference image data S4 to projector 400 (step S152). The CPU 120 sets the block area B23 having a different pixel value in the comparison between the comparison target image data H3 and the entire reference image data S1 to the active state, and sets the block area having no difference in the pixel value to the inactive state. (Step S154).

  FIG. 11 is an explanatory diagram schematically showing comparison target image data and overall reference image data acquired by the CPU in a partially active state. In step 154, since the CPU 120 sets the block area B23 to the active state, as shown in FIG. 11B, the comparison target image data H5 includes the entire block area for the block area B23 in the frame image data F5. The other block areas are duplicated from the flip area X (2) because i = 2 (step S120). The CPU 120 compares the overall reference image data S4 with the comparison target image data H5 (step S132).

  If the CPU 120 determines that there is a difference in the block area B31 by comparing the overall reference image data S4 and the comparison target image data H5 (step S134: YES), the overall reference image data is acquired by the overall reference image acquisition step. FIG. 12 is an explanatory diagram schematically showing a state in which the entire reference image data is acquired from the comparison target image data. FIG. 13 is an explanatory diagram schematically showing a state in which the entire reference image data is acquired from the frame image data.

  As shown in FIG. 12, the CPU 120 duplicates the comparison image data h5 of the comparison target image data H5 for the block region B23 set in the active state, and sets it as the reference image data s5 in the overall reference image data S5 (step S145). In the block area set in the other inactive state, as shown in FIG. 13, the CPU 120 duplicates the area other than the block area B23 in the new frame image data F6 drawn in the VRAM 131, and stores the reference image storage unit. 111. The CPU 120 creates overall reference image data S5 from the two image data. The CPU 120 transmits the entire reference image data S5 to the projector (step S152), sets the block area B23 in which the images are not different to the inactive state, and sets the block area B31 in which the images are different to the active state. Setting is made (step S154). The CPU 120 receives the process end command and ends the process (step S172: YES).

  According to the image processing apparatus according to the present embodiment described above, when detecting a change in the image based on the frame image data drawn in the VRAM, a part or all of the frame image data divided by the flip area is compared with the comparison image data. As compared with the reference image data, it is possible to determine the difference between the images while reducing the processing load compared to the case where all the frame image data and the reference image data are compared.

  According to the image processing apparatus of the present embodiment, the reference image data is updated when there is a difference between the reference image data and the comparison image data, so that the difference between the updated reference image data and the comparison image data is determined. be able to.

  According to the image processing apparatus of the present embodiment, when the frame image data drawn in the VRAM is duplicated and used as the comparison image data, it is highly likely that the image will change again in the area where the image has changed once. In the block area where there is an error, the image data is duplicated for the entire area, and in the block area where there is no change, the image data in one flip area is duplicated. Therefore, when the comparison image data and the reference image data are continuously compared, the area to be copied from the frame image data of the comparison image data can be changed based on the previous comparison result, and the image data can be changed from the entire block area. Since the acquired image data is transmitted to the outside for the area from which the image data has been acquired, the processing burden due to acquiring the image data from the VRAM again can be reduced.

  According to the image processing apparatus in the present embodiment, the reference image data is configured by duplicating the comparison image data. As a result, it is possible to reduce the processing burden caused by duplicating the VRAM frame image data.

  According to the image processing apparatus of the present embodiment, since 1 is added to i every time the difference between the reference image data and the comparison image data is determined, the difference between the reference image data and the reference image data is determined for a flip region different from the previous one. can do. Thereby, even if there is a change in the flip region where the difference is not determined, the change can be detected.

B. Variation:
The present invention can be implemented in various modes without departing from the spirit of the present invention.

B-1. Modification 1:
FIG. 14 is an explanatory diagram of a block area and a flip area in the modification. The area frame data in this embodiment constitutes 12 block areas. However, as shown in FIG. 14A, the number of block areas may be increased or decreased. Further, the size and shape of each block region may be different from each other.

B-2. Modification 2:
The area frame data in this embodiment constitutes the same area as the frame image data drawn in the VRAM 131. However, as shown in FIG. 14B, the area frame data is all areas of the frame image data drawn in the VRAM 131. You do not have to.

B-3. Modification 3:
In the present embodiment, the flip areas X (1) to X (4) in each block area are arranged in a line vertically. However, as shown in FIG. 14C, the arrangement and shape of the flip areas in the block area are changed. You may change it.

B-4. Modification 4:
In this embodiment, the flip areas X (1) to X (4) in each block area are arranged in order. However, as shown in FIG. 14D, even if the order of the flip areas is changed in the block area. Good.

B-5. Modification 5:
In this embodiment, in each block area, the flip area comprises four areas X (1) to X (4). However, as shown in FIG. The number may vary. The sizes of the flip regions may be different from each other.

B-6. Modification 6:
In the present embodiment, the flip regions X (1) to X (4) are grouped in each block region, but are shown in the flip regions X (1) to X (3) shown in FIG. As described above, two or more regions may be used as one flip region.

B-7. Modification 7:
In the present embodiment, a part of the configuration realized by hardware may be replaced by software, or a part of the configuration realized by software may be replaced by hardware.

DESCRIPTION OF SYMBOLS 100 ... Personal computer 110 ... Memory 111 ... Reference | standard image storage part 112 ... Comparison object image storage part 113 ... Frame information storage part 114 ... Image acquisition module 115 ... Image determination module 116 ... Area determination module 117 ... Image transmission module 118 ... Image reproduction Module 120 ... CPU
DESCRIPTION OF SYMBOLS 130 ... Video card 140 ... Image data storage part 150 ... Input interface 160 ... Output interface 200 ... Display 300 ... Keyboard 400 ... Projector 500 ... Screen 1000 ... Image providing system

Claims (13)

An image processing apparatus for determining the difference between a reference image and a target image,
A determination unit that determines the difference between a comparison image formed of a part or all of the target image and a region corresponding to the comparison image in the reference image;
A determination unit that determines whether the next comparison image is a part or all of the target image based on the result of the determination;
An image processing apparatus comprising: an acquisition unit that acquires a comparison image from a target image based on the determination. The image processing apparatus according to claim 1 further includes:
An update unit that updates the reference image based on the result of the determination,
When the determination unit determines that the comparison image and the reference image are different, the image processing apparatus determines whether the reference image updated by the update unit is different from the next comparison image. The image processing apparatus according to claim 1 or 2,
When the determination unit determines that the comparison image and the reference image are the same, the determination unit sets a part of the target image as the next comparison image,
An image processing device that uses all of the target image as the next comparison image if determined to be different. The image processing apparatus according to claim 2 or 3,
The update unit updates the reference image by using the comparison image when the comparison images determined to be different by the determination unit are all of the attention images. In the image processing device according to any one of claims 1 to 4,
The determination unit is an image processing device in which, when a part of the target image is used as a comparison image, one of the divided regions in the target image divided into a plurality of divided regions is used as a comparison image. The image processing apparatus according to claim 5.
When the determination unit determines that the comparison image including one of the divided regions is the same as the reference image, the determination unit selects a divided region different from the divided region used for the determination as An image processing apparatus for comparison images. In the image processing device according to any one of claims 1 to 6,
The image processing apparatus is an image processing apparatus that determines a difference between an overall attention image configured by a plurality of the attention images and an overall reference image configured by a plurality of the reference images. 8. The image processing apparatus according to 7, wherein
When the determination unit determines that the comparison image and the reference image are different from each other in at least one or more of the attention images constituting the overall attention image, the update unit includes all of the entire reference images. An image processing apparatus for updating the reference image. In the image processing device according to any one of claims 1 to 8,
The acquisition unit is an image processing device that selects a target image from a plurality of images arranged in time series. The image processing apparatus according to any one of claims 1 to 9, further comprising:
An image processing apparatus comprising a transmission unit that transmits the reference image to the outside. An image processing method for determining the difference between a reference image and a target image,
Determining a difference between a comparison image composed of a part or all of the target image and a region corresponding to the comparison image in the reference image;
Based on the result of the determination, determining whether to make the next comparison image part or all of the image of interest; and
Obtaining a comparison image from the image of interest based on the determination. A computer program for determining the difference between a reference image and a target image,
A function for determining a difference between a comparison image composed of a part or all of the target image and a region corresponding to the comparison image in the reference image;
A function for determining whether the next comparison image is a part or all of the target image based on the result of the determination;
The computer program for making a computer implement | achieve the function which acquires a comparison image from an attention image based on the said determination.   A computer-readable recording medium on which the computer program according to claim 12 is recorded.

Images