Example of a supersampled image with fourier interpolation + normalization (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-min(texxt_i(:)); texxt_i=texxt_i./max(texxt_i(:)); figure; imagesc(sum(texxt_i,3)); axis equal export_fig 'text_fft2.png' '-png' '-native' '-a1';