How to convert gray scale image which assigned threshhold value in some pixel of original RGB image to RGB?

Question

I have original RGB image.
then, I convert it to gray scale.
then, I assign new threhold value into some pixel.
then, I need to convert the gray scale image from step#3 to RGB image.

I am trying on the step#4. Could you help to advise?

so basically you want to threshold (i.e. place upper/lower bound on) the intensity of an RGB pixel? — catchmeifyoutry, Jul 23 '12 at 12:35
Please see http://stackoverflow.com/questions/2619668/how-to-convert-a-grayscale-matrix-to-an-rgb-matrix-in-matlab — H.Muster, Jul 23 '12 at 12:42

score 1 · Answer 1 · answered Jul 23 '12 at 14:33

Check out rgb2hsv and hsv2rgb in matlab. Then threshold on the value matrix. This makes more sense to me.

Another possibility is to convert to grey scale but keep the original colour image. Then create a mask by thresholding the grey scale image and use that mask to discard the pixels above/below your threshold on the colour matrix.

How to convert gray scale image which assigned threshhold value in some pixel of original RGB image to RGB?

1 Answers1