Personalized RGB Masked Image
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Hi everyone! I'm very new in MatLab Programming.
I have a RGB image and I want that certains color pixels are white, certain pixels are black and the others grey. I used the Threshold Apps (with binary mask), but I have only black or white pixels.
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Image Analyst
2021년 10월 22일
I'm not sure what you are asking. So what does your original image look like? What do you mean that you want white, black, and gray pixels?
If you use the Color Thresholder app (on the Apps tab of the Tool Ribbon) you can find thresholds to segment out a certain color, like red for example. This will create a mask where it's true/1/white where there are red pixels and false/0/black where the pixels are not red.
Attach your image and explain better if you need more help.
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Image Analyst
2021년 10월 29일
이동: DGM
2023년 3월 4일
Those images do not have any green, yellow, or brown in them. Again, "Attach the image that has all these colors that you're working with." How can we fix your code if you won't give us the input image?
추가 답변 (3개)
Image Analyst
2021년 10월 29일
Doing the same thing for yellow and brown is easy and straightforward.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/783183/image.png)
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Image Analyst
2021년 11월 3일
Copy that code multiple times with appropriate changes, or put in in a loop.
Image Analyst
2021년 10월 29일
Doing the same thing for yellow and green is easy and straightforward.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/783198/image.png)
See my other answers for different color pairs.
Image Analyst
2021년 10월 29일
See my discriminant analysis color segmentation demo.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/783213/image.png)
Also check out my delta E demo, attached.
I've posted several new answers this session so be sure to see them all.
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Image Analyst
2021년 10월 29일
The delta E demo identifies all pixels that are within a certain color distance of the average color that you outlined. It finds the delta E of all pixels in the image to the average color, and then thresholds it at the delta E you specify to find colors (anywhere in the image) that are close to what you drew. For example here I drew over the red pepper and it found all red pixels that are within a delta E of 21.9 from the average red in the region I drew.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/783603/image.png)
For what it's worth, I'm attaching another, slightly different demo that works with two images.
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