Patent ID: 8503723
Filing Date: 2013-08-06
Classification: G01S

Abstract:
1. An apparatus comprising: a storage unit configured to store a first attribute of each pixel existing inside a tracking target area set on an image and a second attribute of a pixel existing adjacent to the pixel as adjacent classification data; an allocation unit configured to allocate an evaluation value to a pixel to be evaluated according to a result of comparison between an attribute of the pixel to be evaluated and the first attribute of a pixel existing inside the tracking target area and a result of comparison between an attribute of a pixel existing adjacent to the pixel to be evaluated and the second attribute of a pixel existing adjacent to the pixel existing inside the tracking target area; and a changing unit configured to change the tracking target area based on the allocated evaluation value, wherein the allocation unit is configured, if a pixel corresponding to at least one piece of a first attribute and at least one piece of a second attribute is registered in the adjacent classification data and the pixel to be evaluated is a chromatic color pixel, to allocate high evaluation values to the pixel to be evaluated in descending order of a case where the pixel existing adjacent to the pixel to be evaluated is a chromatic color pixel having a hue different from a hue of the pixel to be evaluated, a case where the pixel existing adjacent to the pixel to be evaluated is a chromatic color pixel having the same hue as the pixel to be evaluated, and a case where the pixel existing adjacent to the pixel to be evaluated is an achromatic color pixel.