Apparatus and method for extracting features of video, and system and method for identifying videos using same

A device for extracting features from a video comprising:

• a frame rate converter performing a frame rate conversion on the video to a preset frame rate;
• a gray scale converter performing a grey scale conversion on the frame rate-converted video;
• a frame size normalizer performing a frame size normalization on the gray scale-converted video to a preset image size;
• and
• a feature extractor partitioning the normalized video into image blocks of a predetermined size, and extracting features from the image blocks on the basis of luminance values of the image blocks,
• wherein the feature extractor extracts the features by using centroid coordinate of the luminance values in the image blocks and centric coordinate of the image blocks,
• wherein the feature extractor extracts the features by calculating the determinant of a matrix including the centroid coordinate and the centric coordinate.