Patent ID: 8699818
Filing Date: 2014-04-15
Classification: H04N

Abstract:
1. An image evaluation method comprising: calculating an average of absolute differences in one of luminance, a color difference, and an RGB value per unit pixel in a pixel group between a first frame and a second frame previous of said first frame at the same pixel position in a video, as a pixel change amount, said pixel group is a block that is obtained by dividing a plurality of pixels of a frame; and calculating a second image quality value of a first image of said video by weighting a first image quality value, said weighting based on said pixel change amount, said first image quality value being calculated based on predetermined data between said predetermined frames in said video, wherein said weighting is applied by comparing said pixel change amount with at least one predetermined threshold, and wherein when said pixel change amount is not greater than a first predetermined threshold, multiplying said first image quality value by a first predetermined constant, and when said pixel change amount is greater than a second predetermined threshold, multiplying said first image quality value by a second predetermined constant.