JP2013072936A - Image processing device and method thereof, computer program for image processing, and recording medium with computer program recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processing device and method thereof for an ortho-image.SOLUTION: An area to be subjected to image processing is selected from a map data storage part. Reference ortho, which exists in the area and serves as a reference of image processing, is extracted from an ortho-image storage part which stores a first ortho-image acquired on the basis of first travel and a second ortho-image acquired on the basis of second travel in association with position information. The reference ortho is arranged on the basis of the position information. A correction area to be corrected is specified in the above area. A correction ortho-image other than the reference ortho, which exists in the correction area, is extracted from the ortho-image storage part. The correction ortho image is arranged on the basis of the position information. A first point in the reference ortho and a second point corresponding to the first point in the correction ortho are specified for calibration. A moving vector indicating moving of the correction ortho to the reference ortho is generated on the basis of the points, and displayed.

Description

  The present invention relates to an ortho-image processing apparatus and method.

With the recent popularization of navigation devices, it is inevitable to use electronic map data used in the navigation devices. In addition, with the development of electronic map data, there is an increasing demand for accuracy.
The electronic map data is generated from, for example, an ortho image based on images continuously taken from vehicles traveling on a road. Then, on a road having a plurality of lanes, an ortho image is acquired by a plurality of times of traveling, for example, when traveling for each lane. That is, the electronic map data is generated while aligning the positions of the plurality of obtained ortho images. For this reason, the operability of this fitting becomes a factor which affects productivity. Here, the ortho image is an image obtained by orthographic projection as if viewed from directly above after correcting the distortion of the shape of the image due to the tilt or specific height of the camera.
As such a technique, Patent Document 1 proposes a road marking map generating apparatus that moves the arrangement of images so that the corresponding points of one image coincide with the corresponding points of the other image.
See also Patent Document 2 which discloses the prior art related to the present invention.

JP 2009-223213 A JP 2010-175756 A

However, in the above prior art, it is difficult to check the history of the amount and direction of image movement performed for the fitting operation.
Therefore, the present inventors have intensively studied an image processing method of an ortho image in order to improve an operator's work efficiency. As a result, it has been conceived that the work efficiency of the ortho image processing operation can be improved by making the ortho image fitting process history visible.

The present invention has been made in view of the above-mentioned problems, and the first aspect is defined as follows. That is,
A target area selecting section for selecting a target area for image processing from the map data storage section;
An ortho image storage unit for storing the first ortho image obtained based on the first run and the second ortho image obtained based on the second run in association with the position information, respectively;
A reference ortho extraction / placement unit that extracts an ortho image serving as a reference of the image processing existing in the target area as a reference ortho from the ortho image storage unit and arranges the reference ortho based on the position information;
Within the target area, a correction area designating unit that designates a correction target area as a correction area;
A correction ortho extraction / placement unit that extracts the ortho image other than the reference ortho, which is present in the correction area, as the correction ortho from the ortho image storage unit, and arranges the correction ortho based on the position information;
An alignment processing unit for designating a first point in the reference ortho and a second point corresponding to the first point in the correction ortho as an index for performing the alignment process on the correction ortho to the reference ortho ,
A movement vector generation unit indicating movement of the correction ortho to the reference ortho based on the first point and the second point;
A movement vector display unit for displaying the generated movement vector;
An image processing apparatus comprising:

According to the image processing apparatus of the first aspect thus defined, an ortho image storage unit that selects a target area to be subjected to image processing and uses a reference ortho image existing in the target area as a reference ortho. And the reference ortho is arranged based on the positional information associated with the reference ortho image. Then, a correction area to be corrected is specified in the target area, and an ortho image other than the reference ortho that exists in the correction area is extracted as a correction ortho from the ortho image storage unit and associated with the correction ortho image. The correction ortho is arranged based on the obtained position information. Further, by specifying the first point in the reference ortho and the second point corresponding to the first point in the correction ortho, a process for adjusting the correction ortho to the reference ortho is performed, and the result of the alignment processing is obtained. Based on this, a movement vector indicating movement of the correction ortho to the reference ortho is generated and displayed.
In this way, by generating and displaying the movement vector based on the result of the image fitting process, the fitting result can be visually confirmed, so that the fitting process is corrected, added, deleted, etc. It becomes possible to improve the working efficiency of the operator.
Further, the first ortho image and the second ortho image are associated with position accuracy, respectively, and the reference ortho extraction / arrangement unit includes the first ortho image and the second ortho image. The associated ortho image with high positional accuracy can be extracted as a reference ortho (second aspect).

The third aspect of the present invention is defined as follows. That is,
In the image processing device defined in the first or second aspect, the movement vector is represented by an arrow from the second point to the first point,
A movement control unit for controlling movement of the correction ortho by controlling the arrow;
According to the image processing apparatus of the third aspect defined as described above, the movement of the correction ortho can be controlled by controlling the arrow indicating the movement of the correction ortho, thereby improving the working efficiency of the operator. be able to. In addition, the order in which the fitting process is performed can be associated with the arrow (fourth aspect).

The fifth aspect of the present invention is defined as follows. That is,
A target area selecting step for selecting a target area for image processing from the map data storage unit;
An ortho image storage step of storing the first ortho image obtained based on the first run and the second ortho image obtained based on the second run in association with the position information, respectively;
From the first ortho image or the second ortho image stored in the ortho image storage step, an ortho image serving as a reference of the image processing existing in the target region is extracted as a reference ortho, and the position information A reference ortho extraction / placement step for placing the reference ortho based on
A correction area designating step of designating a correction target area as a correction area within the target area;
From the first ortho image or the second ortho image stored in the ortho image storing step, the ortho image other than the reference ortho that is present in the correction area is extracted as a correction ortho, and the position information A correction ortho extraction / placement step for placing the correction ortho based on
An alignment process step of designating a first point in the reference ortho and a second point corresponding to the first point in the correction ortho as an index for aligning the correction ortho to the reference ortho ,
Generating a movement vector indicating movement of the correction ortho to the reference ortho based on the first point and the second point;
A movement vector display step for displaying the generated movement vector;
An image processing method comprising:
According to the fifth aspect of the invention thus defined, the same effects as those of the first aspect can be achieved.

The sixth aspect of the present invention is defined as follows. That is,
In the image processing method defined in the fifth aspect, each of the first ortho image and the second ortho image is associated with position accuracy,
In the reference ortho extraction / placement step, the associated ortho image with high positional accuracy is extracted as the reference ortho out of the first ortho image and the second ortho image.
According to the sixth aspect of the invention thus defined, the same effects as those of the second aspect can be achieved.

The seventh aspect of the present invention is defined as follows. That is,
In the image processing method defined in the fifth or sixth aspect, the movement vector is represented by an arrow from the second point to the first point,
A movement control step of controlling movement of the correction ortho by controlling the arrow.
According to the seventh aspect of the invention thus defined, the same effect as the third aspect can be obtained.

The eighth aspect of the present invention is defined as follows. That is,
In the image processing method defined in any one of the fifth to seventh aspects, the order of the fitting process is associated with the arrow.
According to the invention of the eighth aspect defined in this way, the same effects as in the fourth aspect are achieved.

Furthermore, the ninth aspect of the present invention is defined as follows. That is,
A computer program for processing an ortho image, comprising:
A target area selecting means for selecting a target area for image processing from the map data storage unit;
Ortho image storage means for storing the first ortho image obtained based on the first run and the second ortho image obtained based on the second run in association with the position information, respectively.
From the first ortho image or the second ortho image stored in the ortho image storage means, an ortho image serving as a reference of the image processing existing in the target region is extracted as a reference ortho, and the position information A reference ortho extraction / placement means for placing the reference ortho based on
Within the target area, a correction area designating means for designating a correction target area as a correction area;
From the first ortho image or the second ortho image stored in the ortho image storage means, the ortho image other than the reference ortho that exists in the correction area is extracted as a correction ortho, and the position information Correction ortho extraction and arrangement means for arranging the correction ortho based on
An alignment processing means for designating a first point in the reference ortho and a second point corresponding to the first point in the correction ortho as an index for aligning the correction ortho with the reference ortho ,
Movement vector generating means for indicating movement of the correction ortho to the reference ortho based on the first point and the second point;
Movement vector display means for displaying the generated movement vector;
A computer program comprising:
According to the ninth aspect of the invention thus defined, the same effects as those of the first aspect can be achieved.

The tenth aspect of the present invention is defined as follows. That is,
In the computer program defined in the ninth aspect, the first ortho image and the second ortho image are associated with positional accuracy,
The reference ortho extraction / placement means extracts the associated ortho image with high positional accuracy as the reference ortho out of the first ortho image and the second ortho image.
According to the tenth aspect of the invention thus defined, the same effects as those of the second aspect can be achieved.

The eleventh aspect of the present invention is defined as follows. That is,
In the computer program defined in the ninth or tenth aspect, the movement vector is represented by an arrow from the second point to the first point,
And a movement control means for controlling movement of the correction ortho by controlling the arrow.
According to the eleventh aspect of the invention thus defined, the same effects as in the third aspect can be achieved.

The twelfth aspect of the present invention is defined as follows. That is,
In the computer program defined in any of the ninth to eleventh aspects, the arrow is associated with the order of the fitting process.
According to the twelfth aspect of the invention thus defined, the same effects as in the fourth aspect are achieved.

  A recording medium for recording a computer program defined in any of the ninth to twelfth aspects is defined as a thirteenth aspect.

It is a block diagram which shows the structure of the image processing apparatus of embodiment of this invention. It is a schematic diagram which shows the fitting process in the image processing apparatus of this invention. It is a flowchart which shows operation | movement of the image processing apparatus of embodiment of this invention. It is a block diagram which shows the structure of the image processing apparatus of the Example of this invention. It is a block diagram which shows the structure of the image processing apparatus of the other Example of this invention.

An image processing apparatus according to an embodiment of the present invention will be described.
FIG. 1 shows a schematic configuration of the image processing apparatus 1. This will be described below with reference to the schematic diagram shown in FIG.
As shown in FIG. 1, the image processing apparatus 1 includes a map data storage unit 3, an ortho image storage unit 4, a target area selection unit 5, a first storage unit 6, a reference ortho extraction / placement unit 7, and a second storage unit. 8, correction area designation unit 9, third storage unit 10, correction ortho extraction / placement unit 11, fourth storage unit 12, fitting processing unit 13, fifth storage unit 14, movement vector generation unit 15, sixth storage unit 16 and a display 17 as a movement vector display unit.

Map information is stored in the map data storage unit 3. The map information includes information about road elements for defining map information such as links and nodes, information drawn on the map, and the like.
The ortho image storage unit 4 includes a first storage unit 41 and a second storage unit 42. The first storage unit 41 stores the first ortho image obtained based on the first travel, and the second storage unit 42 stores the second ortho image obtained based on the second travel. Is stored. The first ortho image and the second ortho image are, for example, images obtained by traveling in different lanes on the same road. The ortho image storage unit 4 includes a first storage unit 41 and a second storage unit 42, as well as a third storage unit for storing an ortho image obtained based on the third travel, for the m-th travel. An m-th storage unit or the like for storing the ortho image obtained based thereon can be provided as appropriate. Here, the first to m-th ortho images are stored in association with the position information. The position information associated with each ortho image can be position information obtained by a position detection function when a vehicle having a position detection function and a camera travels on a road and acquires an ortho image. Examples of the position detection function include a GPS device, a gyro device, a vehicle speed sensor, and the like. Further, it is preferable that positional accuracy is associated with the ortho image. The position accuracy includes the reception status of the GPS device. As described above, the positional accuracy is associated with the ortho image, so that the later-described reference ortho extraction / placement unit 7 extracts an ortho image having a high positional accuracy as the reference ortho with reference to the position accuracy associated with the ortho image. can do.

The target area selection unit 5 selects an area to be subjected to image processing from the map data storage unit 3. Although the method of the said selection is not specifically limited, For example, it can be designed to accept | permit selection of the object area | region by an operator's manual. As another method, the target area may be automatically selected within a range arbitrarily designated from the map data. The selected target area is stored in the first storage unit 6.
The reference ortho extraction / placement unit 7 refers to the ortho image storage unit 4 and extracts, as a reference ortho, an ortho image that is present in the target area selected by the target area selection unit 5 and serves as a reference for image processing. The reference ortho is arranged based on the position information associated with the reference ortho. A method for extracting the reference ortho is not particularly limited. For example, the position accuracy associated with the first ortho image is compared with the position accuracy associated with the second ortho image, and the ortho with high position accuracy is compared. An image can be extracted as a reference ortho. The comparison of the positional accuracy is based on the fact that the positional accuracy of the ortho image in the first ortho image group stored in the first storage unit 41 and the second ortho image group stored in the second storage unit 42 is a predetermined reference. An ortho image stored in a storage unit having a large number of ortho images satisfying the condition can be extracted as a reference ortho. The reference of the position accuracy includes the number of GPS satellites captured when the position information is acquired. The extracted reference ortho is arranged in the target area selected by the target area selection unit 5 based on the position information associated with the reference ortho. The arranged reference ortho is stored in the second storage unit 8 in association with the target region.

The correction area designating unit 9 refers to the first storage unit 6 and designates a correction target area as a correction area within the target area selected by the target area selection unit 5. The designation method is not particularly limited. For example, an area where the reference ortho is not arranged in the target area, an area where the image of the reference ortho already arranged in the target area is unclear or deformed, etc. Can be specified automatically or manually by an operator. The specified correction area is stored in the third storage unit 10.
The correction ortho extraction / placement unit 11 refers to the ortho image storage unit 4 to extract an ortho image other than the reference ortho that exists in the correction area designated by the correction area designation unit 9 as a correction ortho, A correction ortho is arranged based on position information associated with the correction ortho. The correction ortho extraction / placement unit 11 may extract one ortho image as a correction ortho with respect to one reference ortho, and a plurality of ortho images stored in the ortho image storage unit 4 as correction orthos. It is good also as extracting. The extracted and arranged correction ortho is stored in the fourth storage unit 12 in association with the correction area or in association with new position information after the arrangement.
The matching processing unit 13 refers to the second storage unit 8 and the fourth storage unit 12 and performs processing to match the correction ortho arranged by the correction ortho extraction / placement unit 11 with the reference ortho. The method for the alignment process is not particularly limited. For example, the alignment start point A (point A shown in FIG. 2) is specified in the correction ortho by the operator's manual operation, and the alignment corresponding to the point A in the reference ortho is performed. By specifying the ending point B (same as the point B), the fitting process can be performed. The matching process may be performed by combining one correction ortho, or by specifying a range of correction ortho in advance and combining a correction ortho group existing in the range. The result of the fitting process is stored in the fifth storage unit 14.

The movement vector generation unit 15 refers to the fifth storage unit 14 and generates a movement vector based on the point A specified in the correction ortho and the point B specified in the reference ortho. That is, the movement vector generation unit 15 generates a movement vector representing the movement direction and the magnitude of movement from the point A to the point B. The movement vector may be associated with information such as a movement direction, a movement distance, a range of a correction ortho to be moved, and a movement history (for example, the order of fitting processing) when the movement vector is moved a plurality of times. The generated movement vector is stored in the sixth storage unit 16.
The display 17 refers to the second storage unit 8, the fourth storage unit 12, the fifth storage unit 14, and the sixth storage unit 16, reflects the result of the fitting process, and displays the reference ortho and the correction ortho, At the same time, the movement vector generated by the movement vector generation unit 15 is read from the sixth storage unit 16, and the movement vector is displayed on the display. Although the display of the movement vector is not particularly limited, for example, it can be represented by an arrow from point A to point B. At this time, it is preferable that the reference ortho is preferentially displayed in a range where the reference ortho and the correction ortho overlap.

The operation of the image processing apparatus 1 shown in FIG. 1 will be described with reference to FIG.
First, in step 1, the map data storage unit 3 is referenced to select and save a target area to be subjected to image processing.
In step 3, the reference ortho extraction / placement unit 7 uses the ortho image existing in the target area selected in step 1 as the reference ortho, and the first storage unit 41 or the second storage unit in the ortho image storage unit 4. 42. The storage unit from which the reference ortho is extracted is not particularly limited, but is preferably extracted from the storage unit in which the ortho image with high positional accuracy is stored. That is, for example, obtaining the position accuracy of the entire storage unit based on the position accuracy of the ortho image stored in each storage unit, and extracting the ortho image stored in the storage unit having a high position accuracy as the reference ortho it can. In addition, when position accuracy is given to each storage unit in advance, the reference ortho may be extracted based on the given position accuracy.
In step 5, the reference ortho extraction / placement unit 7 places the reference ortho extracted in step 3 in the target area selected in step 1 based on the position information associated with the reference ortho and saves it. .

In step 7, based on the target region selected in step 1 and the reference ortho placed in step 5, a region to be corrected in the target region is designated as a correction region and stored.
In step 9, the correction ortho extraction / placement unit 11 extracts an ortho image other than the reference ortho that exists in the correction area specified in step 7 as a correction ortho.
In step 11, the correction ortho extraction / placement unit 11 arranges and stores the correction ortho extracted in step 9 in the correction area specified in step 7 based on the positional information associated with the correction ortho. .
In step 13, a process of aligning the correction ortho placed in step 11 with the reference ortho placed in step 5 is performed. In other words, the alignment process is performed by specifying the alignment start point A in the correction ortho and manually specifying the alignment end point B in the reference ortho, either manually or automatically by the operator.
In step 15, a movement vector connecting point A and point B identified in step 13 is generated and stored. The generated movement vector is displayed on a display or the like (step 17).

FIG. 4 is a block diagram of the image processing apparatus 21 according to the embodiment of the present invention. 4, the same elements as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is partially omitted.
FIG. 4 shows an image processing apparatus 21 that can control the movement of the correction ortho by controlling the generated movement vector. That is, the device 21 further includes a control unit 410, a memory unit 411, an input unit 412, an output unit 413, and an interface unit 414 in the device 1 shown in FIG.
The control unit 410 is a computer device including a CPU, a buffer memory, and other devices, and controls other elements constituting the image processing device 21. The control unit 410 includes a movement control unit 23.
The movement control unit 23 controls the movement of the correction ortho based on an operator command in the input unit 412 described later. That is, when a command for deleting the movement vector is input, the movement of the correction ortho is canceled. Further, when a command to change the magnitude and direction of the movement vector is input, the movement of the correction ortho is changed according to the magnitude and direction of the movement vector after the change. Also, the cancellation or change of the movement may be performed by controlling the movement vector, or may be performed by canceling or changing data associated with the movement vector.

A computer program is stored in the memory unit 411, and this computer program is read into the control unit 410, which is a computer device, and causes it to function. This computer program includes a built-in hard disk or built-in memory as a storage device of a terminal device or a mobile terminal device, an SD (registered trademark) memory card, a memory stick, a smart as a storage medium replaceable with the terminal device or the mobile terminal device The data can be stored on a general-purpose medium such as a medium, CompactFlash (registered trademark), or DVD.
The input unit 412 is used, for example, for inputting an operator command. Further, when it is desired to associate a comment with a movement vector, it can be used when inputting the comment. As the input unit 412, a pointing device such as a touch panel or a voice input device such as a keyboard or a microphone that cooperates with display contents of a mouse, a light pen, or a display can be used.
The output unit 413 includes a display, and displays other information such as an input screen and an ortho image stored in the storage unit 3. Further, it also functions as a movement vector display unit that displays the movement vector generated by the movement vector generation unit 15. The output unit 413 can also include a voice transmission unit.
The interface unit 414 connects the image processing apparatus 21 to a wireless network or the like.

FIG. 5 is a block diagram of an image processing apparatus 31 according to another embodiment of the present invention. In FIG. 5, the same elements as those in FIGS. 1 and 4 are denoted by the same reference numerals, and description thereof is partially omitted.
FIG. 5 shows an image processing apparatus 31 capable of presenting points for performing the fitting process. That is, the apparatus 31 further includes a processing point presentation unit 33 in the apparatus 21 shown in FIG.
The processing point presentation unit 33 presents a point for performing the fitting process in the correction ortho. That is, based on the result of the matching process already performed in the target area, the matching process point in the unprocessed area is presented. For example, when two or more matching processes have already been performed, the next matching point can be presented based on the interval between the matching start points. The presenting method can be performed by blinking a point for presenting the fitting process in the correction ortho. Moreover, it is good also as presenting the amount of fitting and the fitting direction together with the presentation of the said processing point. Moreover, it is good also as showing the correction | amendment ortho which should perform a fitting process instead of the presentation of the said process point, or together with the said presentation.
Based on the processing point presented by the processing point presentation unit 33, the operator can manually perform the correction ortho fitting process. In addition to the processing points as described above, when the adjustment amount and the alignment direction are presented, the movement vector generation unit 15 automatically adjusts the correction ortho based on the presented content. It is good also as processing.

As mentioned above, although embodiment of this invention has been described, you may implement combining 2 or more embodiment among these. Alternatively, one of these embodiments may be partially implemented. Furthermore, among these, two or more embodiments may be partially combined.
The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

1 21 31 Image processing device 3 Map data storage unit 4 Ortho image storage unit 5 Target region selection unit 7 Reference ortho extraction / placement unit 9 Correction region designation unit 11 Correction ortho extraction / placement unit 13 Matching processing unit 15 Movement vector generation unit 17 Display 23 Movement Control Unit 33 Processing Point Presentation Unit

Claims (13)

A target area selecting section for selecting a target area for image processing from the map data storage section;
An ortho image storage unit for storing the first ortho image obtained based on the first run and the second ortho image obtained based on the second run in association with the position information, respectively;
A reference ortho extraction / placement unit that extracts an ortho image serving as a reference of the image processing existing in the target area as a reference ortho from the ortho image storage unit and arranges the reference ortho based on the position information;
Within the target area, a correction area designating unit that designates a correction target area as a correction area;
A correction ortho extraction / placement unit that extracts the ortho image other than the reference ortho, which is present in the correction area, as the correction ortho from the ortho image storage unit, and arranges the correction ortho based on the position information;
An alignment processing unit for designating a first point in the reference ortho and a second point corresponding to the first point in the correction ortho as an index for performing the alignment process on the correction ortho to the reference ortho ,
A movement vector generation unit indicating movement of the correction ortho to the reference ortho based on the first point and the second point;
A movement vector display unit for displaying the generated movement vector;
An image processing apparatus comprising: The first ortho image and the second ortho image are each associated with position accuracy;
The reference ortho extraction / arrangement unit extracts the associated ortho image with high positional accuracy as the reference ortho out of the first ortho image and the second ortho image.
The image processing apparatus according to claim 1. The movement vector is represented by an arrow from the second point to the first point;
A movement control unit for controlling movement of the correction ortho by controlling the arrow;
The image processing apparatus according to claim 1, further comprising:   The image processing apparatus according to claim 1, wherein the order in which the fitting process is performed is associated with the arrow. A target area selecting step for selecting a target area for image processing from the map data storage unit;
An ortho image storage step of storing the first ortho image obtained based on the first run and the second ortho image obtained based on the second run in association with the position information, respectively;
From the first ortho image or the second ortho image stored in the ortho image storage step, an ortho image serving as a reference of the image processing existing in the target region is extracted as a reference ortho, and the position information A reference ortho extraction / placement step for placing the reference ortho based on
A correction area designating step of designating a correction target area as a correction area within the target area;
From the first ortho image or the second ortho image stored in the ortho image storing step, the ortho image other than the reference ortho that is present in the correction area is extracted as a correction ortho, and the position information A correction ortho extraction / placement step for placing the correction ortho based on
An alignment process step of designating a first point in the reference ortho and a second point corresponding to the first point in the correction ortho as an index for aligning the correction ortho to the reference ortho ,
Generating a movement vector indicating movement of the correction ortho to the reference ortho based on the first point and the second point;
A movement vector display step for displaying the generated movement vector;
An image processing method comprising: The first ortho image and the second ortho image are each associated with position accuracy;
In the reference ortho extraction / placement step, the associated ortho image with high positional accuracy is extracted as the reference ortho out of the first ortho image and the second ortho image.
The image processing method according to claim 5. The movement vector is represented by an arrow from the second point to the first point;
A movement control step for controlling movement of the correction ortho by controlling the arrow;
An image processing method according to claim 5 or 6.   The image processing method according to claim 5, wherein the order in which the fitting process is performed is associated with the arrow. A computer program for processing an ortho image, comprising:
A target area selecting means for selecting a target area for image processing from the map data storage unit;
Ortho image storage means for storing the first ortho image obtained based on the first run and the second ortho image obtained based on the second run in association with the position information, respectively.
From the first ortho image or the second ortho image stored in the ortho image storage means, an ortho image serving as a reference of the image processing existing in the target region is extracted as a reference ortho, and the position information A reference ortho extraction / placement means for placing the reference ortho based on
Within the target area, a correction area designating means for designating a correction target area as a correction area;
From the first ortho image or the second ortho image stored in the ortho image storage means, the ortho image other than the reference ortho that exists in the correction area is extracted as a correction ortho, and the position information Correction ortho extraction and arrangement means for arranging the correction ortho based on
An alignment processing means for designating a first point in the reference ortho and a second point corresponding to the first point in the correction ortho as an index for aligning the correction ortho with the reference ortho ,
Movement vector generating means for indicating movement of the correction ortho to the reference ortho based on the first point and the second point;
Movement vector display means for displaying the generated movement vector;
A computer program comprising: The first ortho image and the second ortho image are each associated with position accuracy;
The reference ortho extraction / placement means extracts the associated ortho image with high positional accuracy as the reference ortho out of the first ortho image and the second ortho image.
The computer program according to claim 9. The movement vector is represented by an arrow from the second point to the first point;
Movement control means for controlling movement of the correction ortho by controlling the arrow;
A computer program according to claim 9 or 10.   The computer program according to any one of claims 9 to 11, wherein the arrow is associated with the order of the fitting process.   The recording medium which records the computer program as described in any one of Claims 9-12.

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