How can I detect a color percentage in a picture?
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Commented: DGM on 17 May 2022
I have a picture with different colors, but I mainly need the precentage of three colors. how can I do that in matlab?
Kavya Vuriti on 17 Feb 2020
It would be better if you first determine the RGB triplet limits for a specific color and count the number of pixels lying in the above range. The sample code could look like this:
% Read image
I = imread('your_image');
% Define RGB limits
redLowerLimit = your_value;
redUpperLimit = your_value;
blueLowerLimit = your_value;
blueUpperLimit = your_value;
greenLowerLimit = your_value;
greenUpperLimit = your_value;
% Number of pixels of required colour
requiredColor = ( I(:,:,1) >= redLowerLimit & I(:,:,1) <= redUpperLimit ) & ...
( I(:,:,2) >= greenLowerLimit & I(:,:,2) <= greenUpperLimit ) & ( I(:,:,3) >= blueLowerLimit & I(:,:,3) <= blueUpperLimit );
% Percentage of colour in the image
percentColor = 100*(sum(sum(requiredColor))/(size(I,1)*size(I,2)));
Hope this helps.
DGM on 17 May 2022
You need to define the variables. You need to specify an image and select threshold values that are appropriate for your own needs.
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