Patent ID: 7995793
Filing Date: 2011-08-09
Classification: H04N

Abstract:
1. An occlusion detector for detecting occlusion areas in a first image based on a set of motion vectors, with the first image belonging to a series of consecutive images, wherein the occlusion detector comprises: a motion vector selector for selecting a first motion vector and a second motion vector from the set of motion vectors, based on a substantial vector difference between the first motion vector and the second motion vector; a pixel value comparator for calculating a first pixel value difference between a first luminance value of a first pixel of a second image and a second luminance value of a second pixel of a third image, with a first relation between the first pixel and the second pixel given by the first motion vector, and for calculating a second pixel value difference between a third luminance value of a third pixel of the second image and a fourth luminance value of a fourth pixel of the third image, with a second relation between the third pixel and the fourth pixel given by the second motion vector; and a decision unit for deciding whether a particular pixel of the first image, corresponding to an intersection of the first motion vector and the second motion vector, belongs to one of the occlusion areas by checking whether the first pixel value difference is larger than a first predetermined threshold and the second pixel value difference is larger than a second predetermined threshold.