公开(公告)号：US4352126A

公开(公告)日：1982-09-28

申请号：US177012

申请日：1980-08-11

申请人： Jacques Poncin ,  Pierre Rogel ,  Maurice Remy

发明人： Jacques Poncin ,  Pierre Rogel ,  Maurice Remy

IPC分类号： G06T7/20 ,  H04N5/14 ,  H04N5/21

CPC分类号： H04N5/21 ,  G06T7/2053 ,  H04N5/144

摘要： A motion detector system reduces visible noise in television image signals by use of a numerical time filter. A sample memory is coupled to the output of the time filter. In the time filter, the sample of the images to be treated is combined with a corresponding and preceding sample delivered by the sample memory. A decision circuit determines whether the combination signal has a parameter of the time filter. A subtraction circuit has a first input coupled to receive the image sample which is to be treated and a second input coupled to receive the corresponding sample delivered by the sample memory. A low-pass filter has parallel inputs for receiving samples delivered by the subtracting circuit. A sign output is derived from an exclusive OR circuit coupled to a low-pass filter and a band-pass filter. A polarity reversal circuit responds to the two filters under control of the OR circuit for executing a polarity reversal when the values of the inputs of the exclusive OR circuit are different, depending on a threshold-type decision circuit.

摘要翻译： 运动检测器系统通过使用数字时间滤波器来减少电视图像信号中的可见噪声。 样本存储器耦合到时间滤波器的输出。 在时间滤波器中，要处理的图像的样本与由样本存储器传送的相应和之前的样本组合。 判定电路确定组合信号是否具有时间滤波器的参数。 减法电路具有耦合以接收要被处理的图像样本的第一输入和耦合以接收由采样存储器传送的相应样本的第二输入。 低通滤波器具有用于接收由减法电路传送的样本的并行输入。 符号输出从耦合到低通滤波器和带通滤波器的异或电路导出。 根据阈值型判定电路，当异或​​电路的输入值不同时，极性反转电路在OR电路的控制下响应于执行极性反转的两个滤波器。