Photographing unit, cooperative photographing method, and recording medium having recorded program

A cooperative photographing method comprising:

• an image pickup step of photographing an object and acquiring a first image pickup image;
• an image comparison step of comparing the first image pickup image with a second image pickup image from a different photographing unit;
• and
• an angle-of-view display step of displaying the first image pickup image and the second image pickup image on an identical display screen and displaying a display indicating an image pickup range of the first image pickup image in the second image pickup image on the basis of a comparison result in the image comparison step by (1) setting a feature in a specific range within the first image pickup image as a judgment target image, (2) setting, in the second image pickup image, a judgment region identical in size to the judgment target image, (3) judging similarity by comparing the judgment target image with an image in the judgment region set, (4) moving the set judgment region, (5) repeating the act of judging similarity by comparing the judgment target image with an image in the moved judgment region, (6) changing a size of the judgment target image by scaling, up or down, the judgment target image, and (7) repeating the acts of setting a judgment region, judging similarity, moving the set judgment region and repeating the act of judging similarity using the changed size judgment target image.

A non-transitory computer-readable recording medium having a recorded program for causing a computer to execute:

• an image pickup step of photographing an object and acquiring a first image pickup image;
• an image comparison step of comparing the first image pickup image with a second image pickup image from a different photographing unit;
• and
• an angle-of-view display step of displaying the first image pickup image and the second image pickup image on an identical display screen and displaying a display indicating an image pickup range of the first image pickup image in the second image pickup image on the basis of a comparison result in the image comparison step by
• (1) setting a feature in a specific range within the first image pickup image as a judgment target image,
• (2) setting, in the second image pickup image, a judgment region identical in size to the judgment target image,
• (3) judging similarity by comparing the judgment target image with an image in the judgment region set,
• (4) moving the set judgment region,
• (5) repeating the act of judging similarity by comparing the judgment target image with an image in the moved judgment region,
• (6) changing a size of the judgment target image by scaling, up or down, the judgment target image, and
• (7) repeating the acts of setting a judgment region, judging similarity, moving the set judgment region and repeating the act of judging similarity using the changed size judgment target image.

A photographing unit comprising:

• an image pickup portion which outputs a first image pickup image obtained through photographing of an object;
• a display control portion which causes the first image pickup image from the image pickup portion and a second image pickup image from a different photographing unit to be displayed on an identical display screen, the different photographing unit being configured to photograph an image pickup range including an image pickup range of the first image pickup image;
• an image comparison portion which compares the first image pickup image with the second image pickup image;
• and
• an angle-of-view display portion which controls the display control portion on the basis of a comparison result from the image comparison portion to cause the image pickup range of the first image pickup image in the second image pickup image to be displayed in a display form different from a display form of another region in the second image pickup image,
• wherein the angle-of-view display portion regards an image in a specific range in the first image pickup image as a judgment target image, to set, in the second image pickup image, a judgment region identical in size to the judgment target image, and obtains the image pickup range of the first image pickup image by performing similarity judgment by comparing the judgment target image with an image in the judgment region while moving the set judgment region, the similarity judgment being performed while changing size of the judgment target image by scaling up or down the judgment target image.