Patent ID: 8831286
Filing Date: 2014-09-09
Classification: G01N,G02B,G06K,H04N

Abstract:
1. An object identification device identifying an image region of an identification target in an imaged image imaging the identification target in an imaging region, the object identification device comprising: an imaging unit that receives two polarization lights included in reflected light from an object existing in the imaging region and having respective polarization directions different from each other, and that images respective polarization images; a brightness calculation unit that divides two of the polarization images imaged by the imaging unit into respective predetermined processing regions, and that calculates a brightness sum value between the two polarization images for each processing region; a differential polarization degree calculation unit that calculates a differential polarization degree for each of the processing regions, the differential polarization degree indicating a ratio of a brightness difference value between the two polarizations images to the brightness sum value; a selecting condition determination unit that determines whether the differential polarization degree calculated by the differential polarization degree calculation unit satisfies a predetermined selecting condition; and an object identification processing unit that performs an object identification process of specifying the processing region corresponding to the identification target based on the differential polarization degree calculated by the differential polarization degree calculation unit when the selecting condition determination unit determines that the predetermined selecting condition is satisfied, or specifying the processing region corresponding to the identification target based on the brightness sum value calculated by the brightness calculation unit when the selecting condition determination unit determines that the predetermined selecting condition is not satisfied, and identifying plural of the processing regions that are specified as the processing regions corresponding to the identification target and that are adjacent to each other as the image region of the identification target.