案例一:筛选硬币并且定位 实验流程:采集->预处理(滤波)->特征提取(特征直方图)->识别 程序代码: dev_close_window() dev_open_window(0, 0, 512, 512, 'black', WindowHandle) dev_open_file_dialog('read_image', 'default', 'default', Selection) read_image (Image,Selection) invert_image(Image, ImageInvert) rgb1_to_gray(ImageInvert, GrayImage) median