Load up your images and feel free to use the button GUI code.
Normalizes the base to a luminance map, then filters the images based on a threshold set by the x coordinate of the mouse.
The trippiest thing ever, guy. Byteshifts values according to mouseX & mouseY for swanky effect.
Admittedly lame on most images.
space to save,
r to restart,
q to switch image manipulation modes