interpolation of intensity pictures with interp2 function.

Hi,

I have some intensity picture (see attached matrix in mat file). I have there picture of 40X40 pixels. First I want to rescale the picture to x=-10:0.5128:10; and y=-10:0.5128:10, then I want to do interpolation (with interp2) in the same scale but for example five times bigger resolution, i.e. x=-10:0.5128/5:10; y=-10:0.5128/5:10. This is actually what it's done with 3D pictures (https://www.mathworks.com/help/matlab/ref/interp2.html) but I want to do the same with intensity picture.

Thank you very much.