Assign 3-by-1 matrix to image 3D matrix

Question

Grega Mocnik 2019-9-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/480780-assign-3-by-1-matrix-to-image-3d-matrix

回答： Grega Mocnik 2019-9-17

采纳的回答： Grega Mocnik

在 MATLAB Online 中打开

Hello,

I get color values from loop and impixel function.

Color values is 1x3 matrix.

For my calculate must be color dimension like 3x1, therefoe transponing. Result is 3x1 matrix (LMS).

My question is:

how assign 3x1 (LMS) matrix to new matrix (A_LMS) which will be built (and dimension increase) simultaneously. New matrix (A_LMS) is the same size of original image (A)?

for Z = 1 : Za 
    for Y = 1 : Ya
        for X = 1 : Xa
            color = impixel(A, X, Y); 
            LMS = mapM*(color.');
            A_LMS(, , Z) = LMS.';
        end       
    end   
end

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Answer 1

Grega Mocnik 2019-9-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/480780-assign-3-by-1-matrix-to-image-3d-matrix#answer_392278

在 MATLAB Online 中打开

I solve this issue:

for Z = 1 : Za 
    for Y = 1 : Ya
        for X = 1 : Xa
            color = impixel(A, X, Y); 
            LMS = mapM*(color.');
            [Xlms, Ylms] = size(LMS);
            for Y_LMS = 1 : Ylms
                for X_LMS = 1 : Xlms 
                    A_LMS(X, Y, Z) = LMS(X_LMS, Y_LMS);
                end
            end
        end       
    end   
end