Digital imaging definitely has sampling concerns too: https://en.wikipedia.org/wiki/Aliasing https://en.wikipedia.org/wiki/Aliasing Even analog imaging has co

Digital imaging definitely has sampling concerns too: https://en.wikipedia.org/wiki/Aliasing https://en.wikipedia.org/wiki/Aliasing Even analog imaging has concerns that are better described in the frequency domain than the spatial domain: https://en.wikipedia.org/wiki/Airy_disk https://en.wikipedia.org/wiki/Airy_disk https://en.wikipedia.org/wiki/Optical_transfer_function https://en.wikipedia.org/wiki/Optical_transfer_function