| 摘要 |
The present invention discloses a video identification system which uses symmetric information of graded image block and a method thereof. When video clips are input, a frame rate of a video signal is converted to a preset value so the video signal is robust relatively to the conversion in a time axis. Afterwards, a gray grade conversion is performed for only using the brightness information of the video signal. Then, a frame size of the video signal is standardized to a preset size so the video is robust relatively to the size conversion. The frame size is divided to graded blocks by the standardized video, and furthermore symmetric information is extracted from each block thereby generating a specific vector. The graded blocks can be defined along a time axis or along a symmetric structure at a random position in the space for obtaining a graded structure on time or on time-space. |
