You can find it in the opencv installation directory opencv\sources\data. Convenient for everyone to download, so upload here. Face detection, face recognition, eye detection, nose detection, mouth detection, and so on, the training of good XML files

haarcascades
haarcascades\haarcascade_eye.xml
haarcascades\haarcascade_eye_tree_eyeglasses.xml
haarcascades\haarcascade_frontalface_alt.xml
haarcascades\haarcascade_frontalface_alt2.xml
haarcascades\haarcascade_frontalface_alt_tree.xml
haarcascades\haarcascade_frontalface_default.xml
haarcascades\haarcascade_fullbody.xml
haarcascades\haarcascade_lefteye_2splits.xml
haarcascades\haarcascade_lowerbody.xml
haarcascades\haarcascade_mcs_eyepair_big.xml
haarcascades\haarcascade_mcs_eyepair_small.xml
haarcascades\haarcascade_mcs_leftear.xml
haarcascades\haarcascade_mcs_lefteye.xml
haarcascades\haarcascade_mcs_mouth.xml
haarcascades\haarcascade_mcs_nose.xml
haarcascades\haarcascade_mcs_rightear.xml
haarcascades\haarcascade_mcs_righteye.xml
haarcascades\haarcascade_mcs_upperbody.xml
haarcascades\haarcascade_profileface.xml
haarcascades\haarcascade_righteye_2splits.xml
haarcascades\haarcascade_smile.xml
haarcascades\haarcascade_upperbody.xml

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