图像视觉信息是人类从客观世界获得信息的主要来源之一，而视频图像实际上就是一系列连续的静态图像，它是对客观事物形象生动的描述，是一种直观且具体的信息表达形式。随着网络、通信和微电子等技术的快速发展和人们物质生活水平的提高，视频监控以其直观、方便和内容丰富等特点，越来越受到人们的重视。-Images of human visual information obtained from the objective world, a major source of information, and video image is actually a series of consecutive still images, it is a vivid descr iption of objective things, is a visual expression and detailed information. With the network, communications and microelectronics technologies such as the rapid development and people' s material living standards, video surveillance with its intuitive, easy and informative features, more and more attention.