GIMP

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Download the scripts. These layer effects work with decomposition layers and multiplification layers. The tarball contains both scripts.

def layer_effect_salubriousness(image, drawable):
    
    layer_value = pdb.python_fu_decompose_value_layer(image, drawable)
    layer_salubrious = pdb.python_fu_decompose_to_layer_green(image, drawable)

    pdb.gimp_layer_set_mode(layer_salubrious, MULTIPLY_MODE)
    pdb.gimp_equalize(layer_salubrious, False)

files related to subject

• this script and more
• manually make the effect
• other multiplication layer effects
• other unnamed layer effects
• other named layer effects
• more about the decompose plug-in
• Hand Edited People Photos
• Automated People Photos