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

The precise positioning of the track fasteners is the prerequisite for the detection of fastener defects, while the conventional method of locating the track fastener based on machine vision is poor in adaptability and is susceptible to light intensity and shielding.In order to realize the rapid and accurate positioning of the track fastener, a method of locating the rail fastener based on the edge feature is proposed.By using the Canny edge filter operator, the position coordinates and the gradient direction of the edge point are obtained by selecting the standard fastener region in the reference image. On this basis, the search model is constructed and the image pyramid matching search strategy is used to obtain the matching score And then use the matching threshold setting method to track the potential matching points one by one until the bottom of the image pyramid to improve the positioning speed. Based on the least squares method to adjust the pose parameters to achieve sub-pixel-level accuracy.The experimental results show that the method is robust and has good positioning speed and is not affected by illumination and occlusion. The positioning accuracy is 1/15 pixel, and the positioning success rate is more than 95%, which satisfies the positioning requirement of ballastless track fasteners.