Face detection with Python
Today I found an interesting post: Face Detection in Static Images with Python. You give an image as input and the program draws a rectangle around the face(s) on the image.
sudo apt-get install python-opencv libcv-dev opencv-doc
Under Ubuntu 11.04, the required XML is in the
opencv-doc package at a different location, thus you need to modify the source code:
... cascade = cvLoadHaarClassifierCascade( '/usr/share/doc/opencv-doc/examples/haarcascades/haarcascades/haarcascade_frontalface_default.xml.gz', cvSize(1,1)) ...
See the full (patched) source code here.
You can draw a rectangle on an image the following way:
convert original.jpg -stroke red -fill none -draw "rectangle 50,36 115,101" output.jpg
Where 50,36 is the top left, 115,101 is the bottom right coordinates.
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