23 February 2005 First principles' imaging performance evaluation of CCD- and CMOS-based digital camera systems
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Abstract
The new generation of Digital Still Cameras (DSCs) provide a capability of capturing raw data that make it possible to measure the fundamental metrics of the camera. Although CCDs are used in a majority of DSCs, the number of cameras with CMOS-based sensors are increasing. Using first principles, the performance of comparable CCD and CMOS- based DSCs are measured. The performance metrics measured are electronic noise, signal-to-noise ratio, linearity, dynamic range, resolution, and sensitivity. The dark noise and dark current are measured as a function of exposure time and ISO speed. The signal response and signal-to-noise response are measured as a function of intensity and ISO speed. The resolution is measured in terms of the Modulation Transfer Function (MTF) using both raw and rendered data. The spectral sensitivity is measured in terms of camera constants at several wavelengths. Subjective image quality is also measured using scenes that exhibit limiting performance. The ISO speed performance is compared against a film camera.
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Brian G. Rodricks, Brian G. Rodricks, Kartik Venkataraman, Kartik Venkataraman, } "First principles' imaging performance evaluation of CCD- and CMOS-based digital camera systems", Proc. SPIE 5678, Digital Photography, (23 February 2005); doi: 10.1117/12.586288; https://doi.org/10.1117/12.586288
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