pamflip

Flip or rotate a PAM or PNM image. More information: https://netpbm.sourceforge.net/doc/pamflip.html.

• Rotate the input image counter-clockwise for a specific degree:

pamflip -rotate90|180|270 path/to/input.pam > path/to/output.pam

• Flip left for right:

pamflip -leftright path/to/input.pam > path/to/output.pam

• Flip top for bottom:

pamflip -topbottom path/to/input.pam > path/to/output.pam

• Flip the input image on the main diagonal:

pamflip -transpose path/to/input.pam > path/to/output.pam