Patent ID: 8204316
Filing Date: 2012-06-19
Classification: G06T

Abstract:
1. An apparatus for classifying pixels in each frame of a motion picture as foreground or background comprising: distribution generating means for generating a distribution value for a pixel representing an occurrence probability of a pixel value of the pixel based on pixel values of pixels located at the same position in each frame as the pixel; decision means for classifying a pixel as a foreground pixel, a background pixel or an undefined pixel based on a first threshold, a second threshold and the distribution value of the pixel; and adjustment means for sorting each pixel into a foreground pixel or a background pixel based on the classification result of the decision means, wherein the decision means classifies pixels of each frame based on the first and second thresholds as foreground, background or undefined, divides each frame into blocks, calculates differences of the number of pixels in the same class in a block between adjacent frames, updates the first and/or second thresholds for the block based on the differences, and reclassifies pixels in the block when the first and/or second thresholds for the block are updated.