Patent ID: 7623733

Claim:
An image combination device, comprising: amount of background correction calculating means for calculating an amount of background correction or reading out the amount of background correction after the amount of background correction is calculated and recorded, the amount of background correction being performed among (i) a background image, which is an image of a background, (ii) a first object image, which includes at least a part of the background and a first object, and (iii) a second object image, which includes at least a part of the background and a second object, the amount of background correction being one or a combination of relative amounts including an amount of movement, an amount of rotation, a rate of expansion or reduction, and an amount of distortion correction, with respect to a background; superimposed image generating means for generating a superimposed image by using one of the background image, the first object image, and the second object image as a standard image, correcting the other two images by the amount of background correction obtained from the amount of background correction calculating means, the other two images being corrected so that backgrounds, other than objects, of the other two images correspond to the standard image at least partially, and superimposing the standard image and one or both of the other two images; and object region extracting means for extracting a region of the first object and a region of the second object from a difference image generated from the standard image and the other one or two corrected images, the superimposed image generating means superimposing the standard image and the regions of the one or two corrected images obtained from the object region extracting means, instead of superimposing the standard image and the one or two corrected images.