6 copyright: Ushodaya Enterprises Limited
15 - identifier: argument
19 The starting rectangle is given in the format X/Y:WxH[:PWxPY] where
20 PWxPY is the size of the averaging region in pixels.
25 The ending rectangle is given in the format X/Y:WxH[:PWxPY] where
26 PWxPY is the size of the averaging region in pixels.