how we can convert index image (256x256x4 unit8) to truecolor image (256x256x3 unit 8) ?

Actually my image is multi-plane image means index image (256x256x4 unit8),how can i convert it into true color image/RGB (256x256x3 unit 8)

[Thorsten]

What are the four channels?

Answer 1

[Image Analyst]

You're going to have to pick just 3 of the input channels to assign to red, green, and blue. Or you can pick a weighted average of some of them. You have to decide how you want to display your multispectral image in RGB color space.