Reference iflip - Flip Image

    iflip [-v] [-X] [-Y] [sub] inimage outimage 
    

where sub is [-x xoff][-y yoff][-w width][-h height] or [-d divs section]

See also icp .

iflip exchanges the rows, columns, or both rows and columns of an image or subframe within a image.

The -X option interchanges rows, -Y interchanges columns, and specifying both will interchange both rows and columns.

If the -v option is specified, iflip will display the source, resolution and nature of the operation.

    iflip -X -Y back.pic ip iflip -Y -d 9 4 back.pic ip