i need to grade the mangoes based on matured level.

Question

jie tarmizi 2022-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/1734000-i-need-to-grade-the-mangoes-based-on-matured-level

评论： Image Analyst 2023-10-10

i need to grade the mango based on mature level. How can i get the RGb value for the overall mangoes to make it separated based on the value. and im using webcam to snap the picture

this is my coding now

cam = webcam(1);
I = snapshot(cam);
imshow(I);
clear cam;
RGB = imresize(I,[100 100]);
subplot(2,2,[1,2]), imshow(I);
%yellow
maskYellow = makeMaskYellow(RGB);
yellowArea = bwarea(maskYellow)
yellow = bsxfun(@times, RGB, cast(maskYellow, 'like', RGB));
subplot(2,2,3), imshow(yellow);
%green
maskGreen = makeMaskGreen(RGB);
greenArea = bwarea(maskGreen)
green = bsxfun(@times, RGB, cast(maskGreen, 'like', RGB));
subplot(2,2,4), imshow(green); 
if yellowArea > greenArea
    msgbox('Yellow')
else
    msgbox('Green')
end

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DGM 2022-6-5

在 MATLAB Online 中打开

If you're asking how to find the mean color within the masked regions, you can do:

meanyellow = RGB(repmat(maskYellow,[1 1 3]));
meanyellow = mean(reshape(meanyellow,[],3),1)

otherwise, you'll have to clarify what specifically you're trying to do, what your user-defined functions are, and what your images look like.

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Answer 1

prabhat kumar sharma 2023-10-10

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在 MATLAB Online 中打开

Hi jie

I assume that you are encountering issues in finding the RGB values for the overall mangoes, whether they are yellow or green.

Please refer to the following code snippet for reference:

% Obtain RGB values for the overall mangoes
overallMangoes = bsxfun(@times, RGB, cast(maskYellow | maskGreen, 'like', RGB));
overallMangoes = reshape(overallMangoes, [], 3); % Reshape to N-by-3 matrix
RGBValues = unique(overallMangoes, 'rows');
disp(RGBValues);

In this code, the “overallMangoes” matrix is created by applying the logical OR (|) operation to the "maskYellow" and "maskGreen" matrices.

This combined mask is then used to select the corresponding RGB values from the original image (RGB). The resulting RGB values are reshaped into an N-by-3 matrix, where each row represents an RGB value. The “unique“ function is then used to obtain the unique RGB values, and they are displayed using disp.

Regards,

Prabhat Sharma

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Image Analyst 2023-10-10

I think the real problem was how to segment out only mangos in a cluttered image (like with leaves and still on the tree) regardless of what color they are. Even if they were already picked and laying on a black tabletop, you'd still have to segment them out (create a mask), regardless of what color they are. Unfortunately @jie tarmizi didn't/doesn't really care because no images were ever uploaded.

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