Guy Raz's scientific contributions
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Publications (2)
In system performance analysis, most often Signal to Noise Ratio (SNR) and system resolution (via MTF) are analyzed separately. In this paper we advocate the use of a joint measure, namely, the Noise Equivalent Reflectance Difference (NERD) as a function of the Spatial Resolution (SR). We demonstrate that the NERD vs. SR captures most of the essent...
Aiming at night time spaceborne imaging, we compare the expected performances of a low-light-level visible sensor with a conventional IR sensor. The low-light-level visible sensor, an electron multiplier CCD (EMCCD), is a close to ideal photon counting device, with possibly negligible dark current noise and negligible readout noise. This fact, alon...
Citations
... In addition, the standard SNR definition, which is calculated for the average surface reflectance of the Earth, called Instrument SNR in this study, has several definitions to communicate the image quality from various perspectives. These definitions were studied in the literature, such as differential SNR compares SNR for two different surface reflectance values, 9,10 frequency-based SNR reveals spatial frequency relation, [9][10][11] and noise equivalent reflectance difference (NERD) expresses noise equivalent reflectance differences. 10,11 Instrument SNR represents total spectral radiance collected by the imagers' telescope aperture, calculated by the atmospheric models such as PcModWin/MODerate resolution atmospheric TRANsmission (MODTRAN). ...
