Variable blur, gradient blur

Applies different blur filter to each element of a matrix

The code is probably not very efficient, as it contains a for loop. Any improvement ideas are welcomed.

example:
ParameterMatrix=abs(meshgrid(0:199)-100) / 20;
inputimg = double(checkerboard(10,10,10)>0.5);
blurred=VariableBlur(inputimg, ParameterMatrix);
imagesc(blurred);
colormap(gray);