Adaptive Dynamic Range Compression For Flir Imagery

Rami Guissin

doi:10.1117/12.951066

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5 July 1989 Adaptive Dynamic Range Compression For Flir Imagery

Rami Guissin

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Proceedings Volume 1038, 6th Mtg in Israel on Optical Engineering; (1989) https://doi.org/10.1117/12.951066
Event: Sixth Meeting of Optical Engineering in Israel, 1988, Tel Aviv, Israel

Abstract

Infrared imaging sensors are characterized by extended dynamic ranges ≈ 60db due to target and background variations and increased senstivity of the sensors. The dynamic range of display devices such as video monitors is limited to approximately ≈ 40db, requiring in turn appropriate means for compression. Various compression schemes have been proposed based on the compression of the low spatial-frequency components of the image signal, while preserving (or enhancing) the high frequency signal components. The separation of low and high frequency components using various spatial filtering techniques is limited by (i) attenuation and extinction of low contrast and extended targets, and (ii) compressed signal distortions and "ringing" effects around edges. We propose an adaptive, spatial filtering scheme which largely overcomes these limitations while retaining the subjective quality of the compressed image. The adaptive nature of the operator may be tailored to expected target dimensions (in pixels), and to expected target and background contrasts.

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Rami Guissin "Adaptive Dynamic Range Compression For Flir Imagery", Proc. SPIE 1038, 6th Mtg in Israel on Optical Engineering, (5 July 1989); https://doi.org/10.1117/12.951066

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