Error on ind2rgb

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Arygianni Valentino 2017-11-8

评论： ASMA BOUDI 2020-5-25

Greetings everyone.

[X, MAP] = imread('test.jpg');

RGB = ind2rgb(X,MAP);

LAB = rgb2lab(RGB);

Here I tried to convert from index to RGB image using 'ind2rgb' command, but the result is like this: Index exceeds matrix dimensions.

Error in ind2rgb (line 26) r = zeros(size(a)); r(:) = cm(a,1);

I already tried to looking for the solution on the internet, but I couldn't find it.

Hope someone who knew how to fix it, kindly give me a lead here.

Here I also attached the file that I used for this command.

Thank you before.

Stephen23 2017-11-8

"Why not let imread read you image as an RGB immediately?"

imread does not convert indexed images to RGB.

Actually I was trying to use the image processing just as mentioned in this page,

https://www.mathworks.com/help/images/ref/adapthisteq.html

But I got stuck on the ind2rgb part, so I ask some help here.

Anyway, thank you very much for your comment.

I wonder, is there any way to improve the sharpness and quality of the color image?

Since I was tried to improve the quality of my picture, but all the available solution I found was for greyscale image. Thank you before.

KSSV 2017-11-8

Try this:

[RGB, MAP] = imread('test.jpg'); 
[X,map] = rgb2ind(RGB,32) ;
RGB = ind2rgb(X,map);
LAB = rgb2lab(RGB);

Thank you very much, It works!!!

ASMA BOUDI 2020-5-25

Merci

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