I have been trying to understand what super-resolution is, in the context of DSP/DIP. What criteria is being maximized/minimized, and why?
Most of my online searches yield super-res techniques from the optical physics stand point, however I know anecdotally that they have been used in image processing, and in some doppler-radar processing as well.
One particular instance of Super-Res I remember seeing was in the design of a windowing function, where the main lobe was the same width as that of a boxcar, while simultaneously having very low and fast degrading side lobes, similar to a hamming window. In this sense, the 'super-res' came from the fact that frequencies very close to one another were able to be resolved due to the low main lobe width, and a very high dynamic range. Is this what super-res really amounts to?
Is there an explanation that, (perhaps), likens it to a form of de-noising, or sparsity pursuit? Or is it a different animal altogether?