Superresolution by spatial-frequency aliasing

Alan H. Lettington; Qi He Hong; Sophie Tzimopoulou

doi:10.1117/12.243499

27 June 1996 Superresolution by spatial-frequency aliasing

Alan H. Lettington, Qi He Hong, Sophie Tzimopoulou

Proceedings Volume 2744, Infrared Technology and Applications XXII; (1996) https://doi.org/10.1117/12.243499
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

A super-resolution scheme based on the use of a sampling grating has been proposed to extend the spatial resolution of an IR imager operating in the 8 - 14 micrometer spectral region, where there are at present technological difficulties in manufacturing large arrays of photon detectors. An intrinsic property associated with any sampling device is the aliasing effect which transfers the higher spatial frequency content of the scene down onto the lower frequency regions. While this property is regarded as a problem for many image processing algorithms, it is used in this paper as a spatial frequency encoding technique which enables all the spatial frequency information of the scene to pass through the imaging system. A new higher resolution image is then reconstructed from a series of images obtained with the grating in a series of different positions. This method is illustrated by computational and experimental simulations and is compared with super- resolution algorithms based on inverse transform techniques.

Citation Download Citation

Alan H. Lettington, Qi He Hong, and Sophie Tzimopoulou "Superresolution by spatial-frequency aliasing", Proc. SPIE 2744, Infrared Technology and Applications XXII, (27 June 1996); https://doi.org/10.1117/12.243499

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