Patent ID: 6266371
Filing Date: 2001-07-24
Classification: G06T,H04N

Abstract:
Apparatus for detecting motion vector by comparing a base block in a current frame to inspection blocks in a predetermined search area in a reference frame, comprising:means for supplying image data of said base block in said current frame wherein said base block comprises pixels having respective values;first extracting means for extracting a first base component and a second base component from said base block;means for sequentially supplying image data of each of said inspection blocks in the predetermined search area in said reference frame wherein each inspection block comprises pixels having respective values and wherein one pixel in each of said inspection blocks corresponds to one pixel in said base block;second extracting means for extracting a first inspection component and a second inspection component from each of said inspection blocks, wherein said first inspection and said second inspection components are of the same type as said first base and said second base components, respectively; andcomparing means for comparing said first base component to said first inspection component extracted from each of said inspection blocks and said second base component to said second inspection component extracted from each of said inspection blocks to determine the position of an inspection block in the predetermined search area in said reference frame which best matches said base block in said current frame, wherein said comparing means includes first difference means for obtaining, for each individual one of said inspection blocks, a first difference between said first base component of said base block and said first inspection component of the individual inspection block, and second difference means for obtaining, for each individual one of said inspection blocks, a second difference between said second base component of said base block and said second inspection component of the individual inspection block, and;determining means for determining the best matching position of said inspection blocks in said reference frame as a function of said first and second differences;wherein said determining means includes first absolute value means for producing an absolute value of said first difference, second absolute value means for producing an absolute value of said second difference, and adding means for adding the absolute values of said first and second differences.