How can an color image can be changed have only four color in desire area.

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Tabish Raza 2012-10-21

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Hello , i am doing with image segmentation and have an gray image segmented with only four different intensity level .Now how can be it convert to four different color rgb format.

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Answer 1

Walter Roberson 2012-10-21

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https://ww2.mathworks.cn/matlabcentral/answers/51467-how-can-an-color-image-can-be-changed-have-only-four-color-in-desire-area#answer_62732

在 MATLAB Online 中打开

[indimg, map] = rgb2ind(YourImage, 4);
newimg = ind2rgb(indimg, map);

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Tabish Raza 2012-10-21

can it be done with desire pixel intensity.suppose i need only four color red blue green and yellow in output correspond four different gray scale intensity

Image Analyst 2012-10-21

You can create up any colormap you want to assign any graylevel range you want to the color you want. Then pass it in to ind2rgb to make a new rgb image, or just call colormap if you want to not create a new RGB image and just view your grayscale image in a pseudocolor image on the display. Do you just want to view it in color with colormap, or do you actually need a new variable in your program that represents the RGB image?

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