Monitoring video key frame evaluation method

The invention discloses a monitoring video key frame evaluation method, and relates to the technical field of video monitoring image processing. The method comprises the following steps: extracting amotion track of a target in a video sequence by using motion target detection and tracking to form an original motion track set of the target; processing the video sequence, extracting a key frame inthe video sequence, and reconstructing a motion trail set of a target by utilizing a linear interpolation algorithm according to a target motion trail of the extracted key frame; and comparing the original motion trail set with the reconstructed motion trail set, wherein the higher the overlap ratio is, the stronger the capability of capturing the target motion state change by the key frame extraction method is, and on the contrary, the weaker the capability is. The method can be used for effectively evaluating the monitoring video key frame from the aspect of capturing the global and local motion state changes of the