FEATURE EXTRACTION APPARATUS OF VIDEO SIGNAL AND ITS EXTRACTION METHOD, VIDEO RECOGNITION SYSTEM AND ITS IDENTIFICATION METHOD

摘要

A feature extraction apparatus of a video signal and an extraction method thereof, a video recognition system and an identification method for the video recognition system are provided to extract the features of a video signal regardless of the conversion of the frame and compression rates. A feature extraction apparatus of a video signal includes a frame rate conversion unit(102a), a black/white scale conversion unit(102b), a frame size normalization unit(102c) and a block feature extraction unit(102d). The frame rate conversion unit performs the conversion according to a preset frame rate when a video signal is inputted, and the black/white scale conversion unit converts the converted video signal into a black/white signal. The frame size normalization unit normalizes the black/white signal into the size of a preset image. The block feature extraction unit splits the normalized signal into the blocks of certain size, then extracts a feature value depending on the image brightness for each block and outputs the feature vector corresponding to the feature value.