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Chapter 4:
Photon Transfer Theory
A functional block diagram for a typical CCD/CMOS camera system is illustrated in Fig. 4.1. The system shown is described by the six transfer functions related to the semiconductor, pixel detector, and electronics that process the video signal. The input to the camera is expressed in units of the average number of incident photons per pixel (P), and the final output signal is given as the average DN encoded for each pixel. The output is related to the input gain relation S(DN) P =QEI Î⋅ i A SN A SF A CDS A ADC , where the individual gain functions are given in Table 4.1.
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