为了快速提取视频流的直方图信息，提出了一种针对H．264视频流的快速直方图提取算法，并首先详细阐述了该算法的基本原理与实现过程。该算法是直接利用压缩视频流中的特征信息，采用基于统计的方法来快速计算出亮度直方图。相关实验结果表明，用该算法计算出的直方图与计算解压后的图像所得到的直方图非常接近，且效率上有很大的提高，可适用于镜头分割、视频检索等相关应用领域。

In order to extract histogram information from the Compressed Video Stream rapidly, proposed a fast way to extract histogram from the H. 264 Compressed Video Stream, explaine the principle of this algorithm and describe its implementing procedure in detail. This algorithm is based on the information derived from the partially-decoded video bit stream, using the statistical method to get the histogram rapidly. Experimental results show that the presented algorithm can provide satisfactory results, and the computational complexity is significantly reduced. This algorithm can be used in the region of Shot Segmentation, Video Retrieval, and etc.