Antialiasing and enhancement of passive mm-wave focal plane array imagery

Alan H. Lettington; Sophie Tzimopoulou

doi:10.1117/12.391829

20 July 2000 Antialiasing and enhancement of passive mm-wave focal plane array imagery

Alan H. Lettington, Sophie Tzimopoulou

Proceedings Volume 4032, Passive Millimeter-Wave Imaging Technology IV; (2000) https://doi.org/10.1117/12.391829
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

In this presentation we show how antialiasing can be achieved through image processing. Bandlimited images have their bandwidths extended using non-linear image restoration techniques. In these images the spatial frequencies within the passband are known but not the correct irradiance at nay point in the scene. In antialiasing however converse is true. When the bandwidth is to be increased by a factor of two the irradiance at alternate picture points is known but not the correct spectrum. Nevertheless bandwidth extension and removal of aliasing is possible using these non-linear techniques. They have been applied to real imagery using a recently developed 2D Lorentzian algorithm which has then bee used to further enhance the images.

Citation Download Citation

Alan H. Lettington and Sophie Tzimopoulou "Antialiasing and enhancement of passive mm-wave focal plane array imagery", Proc. SPIE 4032, Passive Millimeter-Wave Imaging Technology IV, (20 July 2000); https://doi.org/10.1117/12.391829

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