pamflip
Flip or rotate a PAM or PNM image. tldr-pages
On several platforms
Several platforms
Rotate the input image counter-clockwise for a specific degree
pamflip -rotate90 path/to/input.pam >path/to/output.pamIdentifyFlip left for right
pamflip -leftright path/to/input.pam >path/to/output.pamIdentifyFlip top for bottom
pamflip -topbottom path/to/input.pam >path/to/output.pamIdentifyFlip the input image on the main diagonal
pamflip -transpose path/to/input.pam >path/to/output.pamIdentify