说明：  从最基本的彩色三要素rgb，彩色电视制式pal到视频压缩技术mpeg 1/2/4,从视频处理设备编解码器，摄像机到云台，逐步详细论述了图像及视频应用方面的技术原理。
(From the most basic three elements of color rgb, color television standard video compression technology pal to mpeg 1/2/4, video processing equipment from the codec, PTZ camera to gradually detailed images and video applications technical principle.)