op_saturation

Adjust saturation. Changes the saturation of each visible pixel of the layer or composite image.

op_saturation= *adj*

adj	Saturation adjustment (-100…+100 int).

op_saturation=-100 fully desaturates the image.

Properties

Layer command. Applies to the current layer or to the composite image if layer=comp. Ignored by effect layers.

op_saturation=0, for no change in saturation. CMYK images or layers are converted to RGB before the operation is applied.

Manipulate a color photograph to achieve a “high-key” appearance:

http://server/myRootId/myImageId?op_saturation=-60&op_brightness=45&op_contrast=-35