% gst-inspect-1.0 facedetect | grep -A 2 profile
profile : Location of Haar cascade file to use for face detection
flags: 読み込み可能, 書き込み可能
String. Default: "/usr/share/OpenCV/haarcascades/haarcascade_frontalface_default.xml"
nose-profile : Location of Haar cascade file to use for nose detection
flags: 読み込み可能, 書き込み可能
String. Default: "/usr/share/OpenCV/haarcascades/haarcascade_mcs_nose.xml"
mouth-profile : Location of Haar cascade file to use for mouth detection
flags: 読み込み可能, 書き込み可能
String. Default: "/usr/share/OpenCV/haarcascades/haarcascade_mcs_mouth.xml"
eyes-profile : Location of Haar cascade file to use for eye-pair detection
flags: 読み込み可能, 書き込み可能
String. Default: "/usr/share/OpenCV/haarcascades/haarcascade_mcs_eyepair_small.xml"
/usr/share/OpenCV/...
(大文字)になっているんだけど、haarcascades/haarcascade_frontalface_default.xml
は/usr/share/opencv/...
(小文字)にある。