How can i get the divergence of vector field of a gray scale image??

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sreejini
sreejini on 3 Dec 2014
Edited: Thorsten on 3 Dec 2014
How can i get the divergence of vector field of a gray scale image??

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Accepted Answer

Thorsten
Thorsten on 3 Dec 2014
Edited: Thorsten on 3 Dec 2014
In this example the vector field is computed as the gradient in x and y direction:
function D = imdiv(I)
Ix = diff([I I(:, end)]')';
Iy = diff([I; I(end, :)]);
[X Y] = meshgrid(1:size(I, 2), 1:size(I, 1));
D = divergence(X, Y, Ix, Iy);

More Answers (1)

Sean de Wolski
Sean de Wolski on 3 Dec 2014
Edited: Sean de Wolski on 3 Dec 2014
doc divergence
doc ndgrid
Build a grid of every row/col page and then call divergence with these and your displacement vector values.

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