MOTION VECTOR DETECTING METHOD, MOTION VECTOR DETECTING APPARATUS, MOTION VECTOR DETECTING PROGRAM, AND COMPUTER-READABLE RECORDING MEDIUM WITH THE PROGRAM RECORDED

摘要

PROBLEM TO BE SOLVED: To provide a novel motion vector detecting technology for realizing reduction of a motion vector detection processing time of an image block.

SOLUTION: In a motion vector detecting method, each of pixel values of an image being a detection object is divided by a numerical value of 1 or over at first to produce an image comprising a reduced number of bits wherein the integer part of each quotient is used for each of new pixel values. Succeedingly, SAD values are calculated by using the images comprising a reduced number of bits for processing objects and a minimum SAD value is extracted among them. Then the SAD values of the images comprising a reduced number of bits are evaluated on the basis of the extracted minimum SAD value to discriminate whether or not an image block is to be a calculation object of a true SAD value. Further, the SAD values of true pixel values are calculated by using the image block being a calculation object of the true SAD value for the processing object to particularize the minimum value among them. Finally, a motion vector of the image block is detected on the basis of the image block being the calculation source of the particularized true SAD value.

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