Patent ID: 9299000
Filing Date: 2016-03-29
CPC Classification: G06K,G06T,H04N

Claim Text:
1. An object region extraction system comprising: an effectiveness evaluation quantity acquisition unit for acquiring an evaluation quantity which increases (or decreases) with coming closer to right angle of an angle made by two back projections selected from back projections of one point of an object, wherein said back projections are crossing each other at a position in three-dimensional space and obtained from respective images, which are including said one point and captured by respective ones of m-number of image acquisition units (m: a plural number); an object region determination unit which, when said evaluation quantity is equal to or larger than (or, equal to or smaller than) a predetermined value, determining said position to be a region occupied by said object, and outputting said determination result; and an object likelihood acquisition unit for selecting said m-number of image acquisition units each of which captured an image enabling back projection of said one point, from n-number of image acquisition units (n: equal to or larger than said number m) capable of capturing said position, and calculates a ratio of said number m to said number n as an object likelihood; wherein said object region determination unit for determining said position to be a region occupied by said object if each of said evaluation quantity and said object likelihood is equal to or larger than a respective predetermined value or both of them are equal to or larger than said predetermined values.