filtering - Turn a MATLAB plot into image

Question

I have generated a plot like

figure; hold;
axis([0 10 0 10]);
fill([ 1 1 5 5], [5 1 1 5],'b')

and now I want to have this plot as an matrix so that I can i.e. filter the blog with a gaussian. Googleing I found this thread Rasterizing Plot to Image at MATLAB Central. I tried it, but I could only get it to work for line or function plots.

Do you have any ideas?

Answer 1

You can use GETFRAME function. It returns movie frame structure, which is actually rasterized figure. Field cdata will contain your matrix.

F=getframe;
figure(2)
imagesc(F.cdata);