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RADIANCE AND SYSTEM MODELS
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account for image analog signal autocovariance binits blurring Computational results density and efficiency density h diamond photosensor aperture digital data digital signal discrete signal s(x,y;X,Y due to aliasing electronic filter electronic noise encoding levels entropy equivalent diameter figure of merit formulations of information Fourier transform Gaussian spot intensity given by equation hi/hs Image degradation due information density information efficiency h^/hd information per sample Information theory Langley Research Center line-scan direction line-scan imaging systems line-scan interval log2 low-pass filter mean spatial detail noise and quantization optical-mechanical scanners performance of line-scan photon-detection mechanisms photosensor aperture shapes point-spread function probability density function PSF's quantization intervals quantization levels quantization noise radiance field L(x,y ratio sampling and quantization sampling density sampling intervals sampling passband sampling sidebands scans spatial frequency components spatial frequency response spatial response statistical properties statistically independent sufficiently band-limited Te(w TV cameras units of h upper limit Ur/y variance Wiener spectrum Y/Y X/y