22 August 2003 Effect of spectral emissivity on single broadband MWIR image simulation: Part II
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Abstract
In preceding work, it was shown that the relative error in the predicted intensity of an individual pixel in any broadband MWIR image simulation that employs some form of band-average emissivity and/or average detector responsivity approximation in its models will be about equal to the fractional standard deviation of the MWIR emissivity of the corresponding material. This relationship between the error in simulated integrated image intensity and the variation in spectral emissivity over the MWIR band for a set of 27 commonly encountered scenery materials was shown to behave like a simple power curve, with the power inversely proportional to scene temperature. However, what is more important than the error in a single simulated image pixel is how a multi-pixel simulated image is effected. In this follow-on paper, the errors associated with band-average emissivity approximations are quantified with respect to errors in synthetic images. Comparisons of image contrast and image correlation using band-average emissivity and spectral emissivity are performed. The impact of band-average emissivity in a simple synthetic image on a perception experiment is presented as an example of an application-dependent effect.
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Van A. Hodgkin, Van A. Hodgkin, Eddie L. Jacobs, Eddie L. Jacobs, Timothy C. Edwards, Timothy C. Edwards, } "Effect of spectral emissivity on single broadband MWIR image simulation: Part II", Proc. SPIE 5076, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XIV, (22 August 2003); doi: 10.1117/12.487132; https://doi.org/10.1117/12.487132
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