The invention discloses a fast video
key frame extraction method of the principle characteristic
curve analysis. The method includes the steps that firstly, a visual characteristic expression is extracted from
video image frames; secondly, PCA dimension reduction
processing is performed on a
characteristic matrix X composed of all
video image frame characteristics, and an image low-dimension characteristic expression Y is obtained; thirdly, each characteristic curve in the Y is searched for a curve local extreme point, and the image low-dimension characteristic expression of the frames wherein the curve local extreme points exist is added into a
candidate key frame low-dimension characteristic set T; finally, K mean value clustering is performed on the
candidate key frame low-dimension characteristic set, the original
video sequence image frame corresponding to the
candidate key frame low-dimension characteristic and is closest to the clustering center is used as a final video
key frame to be sent back, and therefore extraction of the video
key frame is obtained. The fast video key frame extraction method of the principle characteristic
curve analysis has the advantages of being small in calculation amount, simple and easy to achieved, and influences of variations of object movement, colors, illumination and the like existing in a
video image sequence can be effectively resisted.