Giving certain pixels a colour

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med-sweng
med-sweng 2013-10-1
编辑： med-sweng 2013-10-1
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.

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回答（1 个）

Image Analyst
Image Analyst 2013-10-1
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.
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med-sweng
med-sweng 2013-10-1
@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

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