Display 2-D grayscale image with vector normal arrows

I have a 2-D grayscale image of a macroscopically flat surface. On a much smaller scale, the surface has regular variations in its surface normal. Is there a way to display the 2-D grayscale image in a 3-d plot while having quiver3 (or something similar) display the local surface normals?

Any help is appreciated!

ken.

Answer 1

[Sean de Wolski]

Yes. Use, slice to plot your image and then overlay the quiver3 on it. Quick example:

I = double(repmat(imread('cameraman.tif'),[1 1 2])); 
%slice requires double precision at least two in each dimension
H = slice(I,[],[],1);
colormap(gray(256)); %8bit color scheme
set(H,'EdgeColor','none') %required so image isn't just an edge
hold on %hold it
quiver3(rand(10,1)*256,rand(10,1)*256,ones(10,1),rand(10,1)*15,rand(10,1)*15,rand(10,1)*7);
%Quiverize it

[Ken]

Works great! Thanks a bunch!