An Improved Video Key Frame Extraction Algorithm Based on Block Color Histogram

摘要

By comparison of conventional global histogram and block histogram, an improved video key frame extraction algorithm based on block color histogram is proposed. The basic idea of this algorithm is to divide the frame into 5 blocks and then calculate the color histogram of each block as the color feature of the frame. A weight is given to each block according to the importance of the space information that the block contains. On this system the distances of histogram between corresponding blocks with non-zero weight are calculated, and then the overall distance accumulated according to the weights is taken as the real distance between the two frames. The frames with less distance indicate less visual differences. In the conclusions, we will show the results of this algorithm.