用像素分析和模式识别方法实现动点位置的实时检测

Detection of position of moving points in real time using pick up pixel and pattern recognition method

研制成功一套由ＣＣＤ摄像机、红外发光二极管标志点、视频信号像束分析接口板，以及微机构成的计算机辅助视频运动检测系统，实现了对两点交叉运动轨迹的实时检测。其工作原理是：运用像素提取方法确定被测光点在视频图像中的位置，用场内模式识别算法和场间轨迹跟踪方法实现交叉轨迹的分离。本系统已用于小脑共济失调患者运动失常的评定。

A computerized video motion detecting system consisted of a CCD camera,infrared light emitting diode markers,video signal processing connector and personal computer is developed.Using this system the loci crossing made by two moving markers are detected.The principle of this system is to pick up the position of the pixel from a video picture to determine the positions of the LED markers,to use the pattern recognition algorithm to the same field to distinguish two markers and to use the algorithm to following the track of moving points belong to different fields.Using this system,the abnormal movements in cerebellar ataxia patients is evaluated.Author' s address:(Tsinghua University,Beijng,100084)