eded to convert my images to PPM format, which is one of those image formats that no-one uses but somehow is the lowest common denominator... pos’ contains the results of face detection. Line one is the number of detections, then each line has f... g a minimum size for the face. I experimented and one sixth of the total image width gave good results ... ally, as promised, I’ll tell you how to blank-out one side of the face: of course, using Image Magick.