Effects Of Tilt Of A Four-Bar Pattern On The Minimum Resolvable Temperature Difference (MRTD)

T. Saheki; J. Yamashita; T. Takei; M. Kondo

doi:10.1117/12.932857

28 December 1981 Effects Of Tilt Of A Four-Bar Pattern On The Minimum Resolvable Temperature Difference (MRTD)

T. Saheki, J. Yamashita, T. Takei, M. Kondo

Proceedings Volume 0310, Image Quality; (1981) https://doi.org/10.1117/12.932857
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

Effects of tilt of a four-bar pattern on the minimum resolvable temperature difference (MRTD) of FLIR are discussed. When the bar pattern is tilted from the direction perpendicular to the detector scan direction, the displayed image of the bars has zigzag edges and the effective overscan ratio for the displayed image of the tilted bar pattern is reduced; both of these effects degrade the perceived signal-to-noise ratio. The quantitative treatments of these effects are presented. The perceived signal-to-noise ratio and the MRTD are de-rived as a function of the tilted angle of the bar pattern. To verify the theoretical results, MRTD measurements were performed with a serial scan FLIR which was developed in our laboratory. The overscan ratio of the FLIR was varied from 1 to 2 while the tilted angle of the bar pattern was changed up to 60°. Good agreement between the theoretical MRTD and the observed one was demonstrated.

Citation Download Citation

T. Saheki, J. Yamashita, T. Takei, and M. Kondo "Effects Of Tilt Of A Four-Bar Pattern On The Minimum Resolvable Temperature Difference (MRTD)", Proc. SPIE 0310, Image Quality, (28 December 1981); https://doi.org/10.1117/12.932857

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