Monochrome
Function
This makes any image black-and-white. Default values are weighed according to
the eye's different sensitivity to Red, Green, and Blue, but you can override
the weights. Notice that it will reduce a 3-channel image (RGB) to a 1-channel
image (BW), and a 4-channel (RGBA) to a 2-channel image (BWA). If the 3 color
channels are identical, it is more efficient to use a Reorder with a
value of rrr, since only the red channel would be read in. Monochrome
reads all 3 channels in, and therefore has more I/O activity.
Parameters
|
Type
|
Defaults
|
Function
|
r,g,bWeight |
float
|
.3, .59, .11
|
The defaults are set according to the eye's sensitivity to color, but you can balance the colors differently if you want to push a certain channel. |
Synopsis
image Monochrome( image, float rWeight, float gWeight, float bWeight );
Script
image = Monochrome( image, rWeight, gWeight, bWeight);
Command Line
shake -monochrome rWeight gWeight bWeight