Skew_correction correct for camera perspective "Skewcorrection.pat uses a least-squared error transformation to correct for skew in an image, typically caused by the camera's perspective. This is based on correcting a warped calibration rectangle in the image to a true rectangle."	from the library : Flock Vision Toolkit Format : Javaclass (mxj) Environment : jitter freeware Max 4.x / 5.x http://www.jasonfreeman.net/flock/