How to find the exact index(row, col) of a maximum value in a matrix?

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Muhamed Sewidan
Muhamed Sewidan 2020-8-1
回答： KSSV 2020-8-1
I want to find the maximum value in an image, I tried to find its index and I found it after converting the image matrix into a vector. How can I find this value in a matrix? and then plot it over an image?

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KSSV
KSSV 2020-8-1
Let I be your image.
[m,n,p] = size(I) ;
x = 1:n ;
y = 1:m ;
[X,Y] = meshgrid(x,y) ;
[val,idx] = max(I(:)) ;
imshow(I)
hold on
plot(X(idx),Y(idx),'*r')

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