MATLAB Answers

Thresholding in Color Image

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pushk dfd
pushk dfd on 16 Dec 2013
Commented: Image Analyst on 5 Feb 2014
Dear All, I need to threshold for the range of colors belong to yellow in an color image.How can I do that.I tried with separating the RGB components.But it did not work for my purpose as it would give me unexpected results.
Your kind consideration given with this regard is highly appreciated.
Thanks in advance.

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Answers (3)


pushk dfd
pushk dfd on 5 Feb 2014
Dear Image Analyst, Anyway i couldnt figure it out in the way that is shown there.But thank you very much for your time and efforts.

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Image Analyst
Image Analyst on 5 Feb 2014
if you want any help, post your image.

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tudor dima
tudor dima on 5 Feb 2014
Edited: tudor dima on 5 Feb 2014
If I correctly understood your problem -- you should convert your image to HSV and then obtain your selection by thresholding to the desired hue range ("yellow" in your case).
Also, intensity changes might also alter the perception of a colour as "yellow", so you might want your thresholding to run also on the "V" dimension of your hsv data.

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Image Analyst
Image Analyst on 5 Feb 2014
I agree, and both of my links allow him to do exactly that, so I'm really puzzled as to why he said he can't figure it out.

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