国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

An algorithm of the impacted sheet perforation area based on image processing is put forward in this paper. By coloring the impacted sheet or choosing the background for the perforation, the grey-levels of the perforation and the impacted sheet in image can become distinctly different. The average of the two grey-levels is regarded as grey threshold and applied to judge if a pixel is from the perforation. Denoting the pixel number of the perforation and the impacted sheet in image by N and M, then the impacted sheet perforation area can be expressed as NS, where S is the actual area of the impacted sheet. A simulation result validates the feasibility and accuracy of the algorithm.