Performance comparison of rectangular (4-point) and diagonal (2-point) dither

Keith A. Krapels; Ronald G. Driggers; Richard H. Vollmerhausen; Carl E. Halford

doi:10.1117/12.391776

17 July 2000 Performance comparison of rectangular (4-point) and diagonal (2-point) dither

Keith A. Krapels, Ronald G. Driggers, Richard H. Vollmerhausen, Carl E. Halford

Proceedings Volume 4030, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XI; (2000) https://doi.org/10.1117/12.391776
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

Staring array imagers can exhibit sampling artifacts. Dither is a mechanical means of raising the spatial sampling rate without increasing the number of detectors on the focal plane array. Diagonal (two-point or slant-path) dither is easier to implement mechanically than rectangular (four- point orbow-tie) dither. Also, diagonal dither generates half the data rate of rectangular dither. However, diagonal dither does not sample the image as effectively as rectangular dither. The cost and complexity advantages of diagonal dither must be traded against the expectation of reduced performance. This paper discusses analytical and empirical predictions of the performance difference between diagonal and rectangular dither.

Citation Download Citation

Keith A. Krapels, Ronald G. Driggers, Richard H. Vollmerhausen, and Carl E. Halford "Performance comparison of rectangular (4-point) and diagonal (2-point) dither", Proc. SPIE 4030, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XI, (17 July 2000); https://doi.org/10.1117/12.391776

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