SYNOPSISprotate [ -c ][ -r ] input [ output ]
DESCRIPTIONProtate rotates a RADIANCE picture 90 degrees. This is useful for output on hardcopy devices with aspect ratios opposite to the input picture. By default, the image is rotated clockwise. The -r option may be used to rotate the image counter-clockwise instead.
The -c option indicates that the action is to correct an improper original image orientation, thus the recorded scanline ordering should not be changed.