Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2002 · 12 citations · 0 references
Natural SciencesAstronomyVision ScienceAtmospheric ScienceDigital ImagingOpticsAtmospheric EffectsAtmospheric Refraction CorrectionFourier OpticsImage ReconstructionImage RestorationImagingAtmospheric TurbulenceAtmospheric Turbulence CompensationAtmospheric Turbulence EffectsDistortionsImage Super-resolutionPoint Spread FunctionSpatial Frequency ResponseSuper-resolution Imaging
We postulate that under anisoplanatic imaging conditions involving imaging through turbulent media over a wide-area there exists the possibility of spatial frequency content that is normally lost outside the aperture of an imaging instrument under unperturbed viewing conditions, being aliased into the aperture. Simulation is presented that reinforces this premise. We apply restoration algorithms that were designed to correct non-uniform distortions, to a real image sequence to the effect of noticing the de-aliased super-frequency content. We claim this to be super-resolution, and that it is only possible under anisoplanatic imaging scenarios, where the point spread function of the image is position dependent as a result of the atmospheric turbulence.