编译opencv_contrib出错是因为少这个文件,而通过github下载老是下载失败。https://blog.csdn.net/csdn330/article/details/86747867?utm_medium=distribute.pc_relevant_download.none-task-blog-baidujs-2.nonecase&depth_1-utm_source=distribute.pc_relevant_download.none-task-blog-baidujs-2.nonecase0有详细细节与解决办法,下载后请解压至指定位置
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