Giving certain pixels a colour

For an image I have, how can I do the following in MATLAB?

- Giving the pixels with values 100 for instance the colour green

EDIT

Giving all pixels except those with values `255` and `0` the colour `green`

- Leaving the pixels with 0 as is. That is, keeping them black

- Giving all other pixels the colour red

EDIT

Giving those pixels with value `255` the colour `red`

Thanks.

Answer 1

[Image Analyst]

If the image is not grayscale, then what do you mean by "pixels with values 100"??? So, if it's RGB, do you want to replace only pixels with value (100,100,100) - in other words, 100 in every single color channel? That probably won't happen too often unless you have a synthetic (created) image.

[med-sweng]

@Image Analyst. I have converted the image into grayscale. Say that the white pixels have the value `255`. For those, I want to assign them the 'red` colour, and for all other pixels, I want to assign them the colour `green`. How can I do that? Thanks