Patent ID: 8295612

Claim:
A change image detecting device for detecting a change image that has changed when compared with a temporally previous image, the change image being detected from among a plurality of images arranged consecutively in a time series, the change image detecting device comprising: a first storing unit that stores a first image, the first image being one of the plurality of images arranged in the time series; a second storing unit that stores a reference image; a change image detecting unit that detects the change image; a determination unit that compares a first portion of the first image with a first portion of the reference image and determines whether there is a change between the first portion of the first image and the first portion of the reference image, wherein: if the determination unit determines there is no change between the first portion of the first image and the first portion of the reference image: the change image detecting unit selects a second image, which is temporally later than the first image and stored in the first storing unit, as a new image to be processed, and the determination unit compares a second portion of the second image with a second portion of the reference image and doesn't compare any portion of the second image with the first portion of the reference image, the second portion of the reference image being at a different position in the reference image than the first portion of the reference image, and if the determination unit determines there is change between the first portion of the first image and the first potion of the; reference image, the change image detecting unit detects the first image stored in the first storing unit as the change image, selects the first image as a new reference image, and stores the first image in the second storing unit as the new reference image; and an image transmission unit that transmits the change image to an image display device that is connected to the change image detecting device through a network.