/usr/share/doc/opencv-doc/examples/c/facedetect.cmd is in opencv-doc 2.3.1-7.
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1 2 | REM an example of using haar cascade recognition for face and eye detection.
facedetect --cascade="../../data/haarcascades/haarcascade_frontalface_alt.xml" --nested-cascade="../../data/haarcascades/haarcascade_eye.xml" --scale=1.3 %1
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