Techniques for removing odd/even detector noise from pushbroom scanners with large linear arrays

Dennis L. Helder; Michael Choate

doi:10.1117/12.179785

8 July 1994 Techniques for removing odd/even detector noise from pushbroom scanners with large linear arrays

Dennis L. Helder, Michael Choate

Proceedings Volume 2231, Algorithms for Multispectral and Hyperspectral Imagery; (1994) https://doi.org/10.1117/12.179785
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

Multispectral imaging instruments are often built in a pushbroom scanner configuration with focal planes consisting of large linear arrays containing up to several thousand detectors. Design considerations of such arrays often favor arrangements such that all even numbered detector elements are processed along a path that differs from all odd numbered detector elements. this can cause instrument-induced artifacts in the resulting imagery. Two techniques have been developed that attempt to attenuate this type of artifact. One is based on modeling the artifact as differences in detector bias. These differences are estimated in the spatial domain and corrections are applied. The second approach takes advantange of a convenient wavelet decomposition of the iamge that effectively isolates the artifact from image information. After appropriate filtering in wavelet space, artifacts in the reconstructed image are significantly reduces. These techniques have been applied to SPOT imagery with encouraging results.

Citation Download Citation

Dennis L. Helder and Michael Choate "Techniques for removing odd/even detector noise from pushbroom scanners with large linear arrays", Proc. SPIE 2231, Algorithms for Multispectral and Hyperspectral Imagery, (8 July 1994); https://doi.org/10.1117/12.179785

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