Patent ID: 6567468
Filing Date: 2003-05-20
Classification: G06T

Abstract:
A motion detection circuit comprising:delay means for generating a delayed video signal from a video signal, said delayed video signal being delayed by one frame from said video signal; interframe difference signal generation means for generating an interframe difference signal between said video signal and said delayed video signal; edge detection signal generation means for detecting an edge from said video signal and said delayed video signal and generating an edge detection signal; and motion judging means for judging a motion in said video signal at a target pixel from said interframe difference signal in accordance with said edge detection signal to output a motion detection signal, wherein said motion judging means includes: peripheral pixel comparing means for detecting polarities of said interframe difference signal at each pixel at a predetermined area around said target pixel, detecting a difference in the number between said positive and negative polarities of said interframe difference signal at each pixel at said predetermined area and an absolute value of said difference, obtaining a J-valued first result from said absolute value to output said J-valued first result; and majority detection means including a memory for detecting a majority of Q of said first results of said peripheral pixel comparing means at Q pixels around said target pixels and judging said motion in said interframe difference signal at said target pixel in accordance with said detected majority with deviation to a side of stopping to output a second result as said motion detection signal, J being a natural number more than one, Q being a natural number more than one.