Value that is used when you apply a gradient to an RGB image map

Hello:

I'm doing a classification of the color in Photoshop using the map of gradient, so the colors of certain range in the initial image corresponds to a given color chosen Gradient of.

The final product is somehow predictable if the original image is an image in grayscale. However, if the original scale is a RGB image, value that will be used to determine the color applied to each pixel of the slope?

There are several ways to calculate the luminosity of an RGB image, such as (0.2126*R) + (0.7152*G) + (0.0722*B) . I tried to use some, but none of them can be used to predict the actual color used by Photoshop to generate gradient.

Does anyone know the formula used by Photoshop to determine with a pixel RGB is the color?

Thank you

Shane Li

About ((red) *.3 + (green) *.59 + (blue) *. 11)

Tags: Photoshop

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