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pnmflip (1)

perform one or more flip operations on a portable anymap

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SYNOPSIS

pnmflip

[ -leftright | -lr ]

[ -topbottom | -tb ]

[ -transpose | -xy ]

[ -rotate90 | -r90 | -ccw

]

[ -rotate270 | -r270 | -cw

]

[ -rotate180 | -r180 ]

[ pnmfile ]

DESCRIPTION

Reads a portable anymap as input. Performs one or more flip operations, in the order specified, and writes out a portable anymap. rotation reflection transposition

OPTIONS

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 concatenations are available: -rotate90 or -ccw is equivalent to -transpose -topbottom ; -rotate270 or -cw is equivalent to -transpose -leftright ; and -rotate180 is equivalent to -leftright -topbottom .

All flags can be abbreviated to their shortest unique prefix.

AUTHOR