subimg(6D)

NAME
     subimg - extract a sub-region from an image

SYNOPSIS
     subimg inimage outimage x1 x2 y1 y2

DESCRIPTION
     subimg extracts a region from an image.  The region to be extracted is
     specified by x1 x2, y1 and y2.  These coordinates are relative to the
     bottom left corner of the image.  Negative values may be used to give
     coordinates from the upper right corner.  To extract an image inset 10
     pixels from a source image use coordinates 10 -10 10 -10.