- Method phasevh
Draws images describing the phase of the current image. phaseh gives the horizontal phase and phasev the vertical phase.
phaseh gives an image where
max falling min rising value= 0 64 128 192
0 is set if there is no way to determine if it is rising or falling. This is done for the every red, green and blue part of the image.
Phase images can be used to create ugly effects or to find meta-information in the orginal image.
original phaseh() phasev() phasevh() phasehv()
the new image object
experimental status; may not be exact the same output in later versions
0 should not be set as explained above.