Example of a supersampled image with fourier interpolation + saturation (0...1) afterwards method. The image was created using matlab texxt_i=; i=1; texxt_i(:,:,i)=(interpft(interpft(texxt(:,:,i),size(texxt,2)*2,2),size(texxt,1)*2,1)); texxt_i(texxt_i<0)=0; texxt_i(texxt_i>1)=1; figure; imagesc(sum(texxt_i,3)); axis equal export_fig 'text_fft2.png' '-png' '-native' '-a1';