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pnmflip - perform one or more flip operations on a portable anymap
pnmflip [-leftright|-lr] [-topbottom|-tb] [-transpose|-xy] [-rotate90|-r90|-ccw ]
[-rotate270|-r270|-cw ] [-rotate180|-r180] [pnmfile]
Reads a portable anymap as input. Performs one or more flip operations, in the order
specified, and writes out a portable anymap.
The flip operations available are: left for right (-leftright or -lr); top for bottom
(-topbottom or -tb); and transposition (-transpose or -xy). In addition, some canned con-
catenations are available: -rotate90 or -ccw is equivalent to -transpose -topbottom;
-rotate270 or -cw is equivalent to -transpose -leftright; and -rotate180 is equivalent to
All flags can be abbreviated to their shortest unique prefix.
Copyright (C) 1989 by Jef Poskanzer.
25 July 1989 pnmflip(1)
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