How to separate an image to rgb?

How to extract r, g and b values from an image in matrix form?

Answer 1

[Jos (10584)]

Is your image a RGB image with 3 dimensions?

RedValues = MyImage(:,:,1)
...

[adibbakarrudin]

yes, rgb image with 3 dimesions. but i have a question, i have used "RedValues = MyImage(:,:,1)" before, then, why r value display so many 0?

[Walter Roberson]

Why not? Not every location will have any measurable red contribution.

[Image Analyst]

Try putting a semicolon at the end of the line to suppress the display of pixel values.