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

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sreejini
sreejini 2014-12-3
编辑： Thorsten 2014-12-3
How can i get the divergence of vector field of a gray scale image??

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Thorsten
Thorsten 2014-12-3
编辑：Thorsten 2014-12-3
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);

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Sean de Wolski
Sean de Wolski 2014-12-3
编辑：Sean de Wolski 2014-12-3
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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