Patent ID: 7990430
Filing Date: 2011-08-02
Classification: G02B

Abstract:
1. A time-lapse photographing device comprising: a photographing element that photographs an observation object; an image acquisition unit that controls the photographing element, performs time-lapse photographing intermittently with a predetermined standby time, and acquires a plurality of images at each photographing timing of the time-lapse photographing; an image change determination unit that compares an image at the present photographing timing when the image is acquired by the image acquisition unit with an image at a previous timing, thereby determining whether or not there is a change in the acquired image; an image extraction unit that extracts at least one representative image from among a group of images for which the presence of a change in the image of the observation object has been determined by the image change determination unit and extracts at least one representative image from among a group of images for which the absence of a change in the image of the observation object has been determined; and an image memory that saves, separately for each of the photographing timings, an image at each of the photographing timings extracted by the image extraction unit.