Patent ID: 7409074

Claim:
An image processing device for image processing of image data including a predetermined number of pieces of pixel data obtained by an image-obtaining device having time-integration effects, and calculating a mixture ratio indicating a mixed state in said pixel data of objects-which are multiple in the real world, said image processing device comprising: an equation generator that, with regard to said image data, within a mixed region, extracts, from said image data, contour region pixel data within a frame of interest positioned at a contour region with approximately a same mixture ratio, extracts corresponding pixel data corresponding to said contour region pixel data from a frame that has been acquired at a different time from said frame of interest, extracts background pixel data which includes a background object component corresponding to said contour region pixel data or said corresponding pixel data, and generates an equation wherein said mixture ratio is an unknown number, using said contour region pixel data, said corresponding pixel data, and said background pixel data, based on region specifying information specifying a non-mixed region made up of a foreground region including a foreground object component configuring a foreground object and a background region made up of only a background object component configuring a background object and a mixed region wherein said foreground object component and said background object component are mixed, and movement of said foreground object component; and a mixture ratio detector that detects said mixture ratio in said frame of interest by solving said equation.