图像像素距离与空间距离变换公式的求解。计算目标运动的速度和对应的像素变化的关系，很有用。-Image pixel distance and spatial distance transformation formula solving. Change of speed for calculating the target motion and the corresponding pixels, very useful.

基于运动目标跟踪的视频监控系统， 基于运动目标跟踪的视频监控系统，基于运动目标跟踪的视频监控系统-the video monitoring system based on moving target tracking