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Proceedings Paper

Radiometric Image Restoration And Calibration With A Modified TICM II Thermal Imager
Author(s): F. J. J. Clarke; J. K. Leonard
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Paper Abstract

A new measurement facility uses a TICM II thermal imager specially modified by NPL to determine the distribution of emissivity of non-uniform materials and artefacts at near ambient temperature. A dual-reference image processing algorithm is used to provide both image restoration and calibration. Systematic variations of responsivity across the image (fixed pattern errors) such as banding and narcissus effect, which arise from various optical, scanning, detector and electronic defects are completely removed, to the limits imposed by random noise and stability. The algorithm is applicable to greyscale images from any image processing transducer with near-linear response.

Paper Details

Date Published: 1 April 1990
PDF: 12 pages
Proc. SPIE 1191, Optical Systems for Space and Defence, (1 April 1990); doi: 10.1117/12.969688
Show Author Affiliations
F. J. J. Clarke, National Physical Laboratory (United Kingdom)
J. K. Leonard, National Physical Laboratory (United Kingdom)

Published in SPIE Proceedings Vol. 1191:
Optical Systems for Space and Defence

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