threshold
代码说明：
A java application - processing which can be downloaded free from processing.org Here it uses a free library - OpenCV - made by intel. .. to convert all the pixels in an image - in fact in a movie - a capture from the webcam. If the color of a pixel is "higher" comparing to a threshold it turns black - otherwise it becomes white.(A java application- processing which can be downloaded free from processing.org Here it uses a free library- OpenCV- made by intel. .. to convert all the pixels in an image- in fact in a movie- a capture from the webcam. If the color of a pixel is "higher" comparing to a threshold it turns black- otherwise it becomes white.)
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