来源:** https://www.cnblogs.com/YouXiangLiThon/p/14246094.html **
其实,通过代码:git clone下来的(这里是最新的opencv4.5.1)在 opencv/.cahe/ 文件夹下面的文件有:
ade data ippicv xfeatures2d,其中, data ippicv xfeatures2d 里面的文件都没有,data下面是 7505c44ca4eb54b4ab1e4777cb96ac05-face_landmark_model.dat
要自己去下载这个数据,可以到github上面下载(之前给的csdn连接是需要积分的,这里给免费的):
https://github.com/opencv/opencv_3rdparty/tree/ippicv/master_20191018
https://github.com/opencv/opencv_3rdparty/tree/contrib_face_alignment_20170818
https://github.com/opencv/opencv_3rdparty/tree/contrib_xfeatures2d_vgg_20160317
https://github.com/opencv/opencv_3rdparty/tree/contrib_xfeatures2d_boostdesc_20161012
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