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Proceedings Paper

MTF and CTF measuring system for digital still cameras
Author(s): Sheng-Yuan Lin; Wen-Hsin Chan
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Paper Abstract

An inexpensive measurement system for characterizing digital still cameras is described. The method adopted involves performing mathematical analyses directly on the images of test charts obtained from the DSC. These charts comprise of squarewave patterns with selected spatial frequencies, the phases of which with respect to the CCD sensors cover most or all of the phase domain. By working on the final images generated by DSCs, we can include the effects of the digital signal processing on the performance of the DSC. Slightly rotated optical patterns of squarewaves with different spatial frequencies were projected on the CCD to determine the phase-dependent CTF. These phase-dependent data were then statistically analyzed to obtain average CTF values that better describe the characteristics of the DSC. The low cost system developed in our laboratory is very suitable for evaluating and designing digital signal processing algorithms when developing digital still cameras.

Paper Details

Date Published: 25 April 1997
PDF: 8 pages
Proc. SPIE 3019, Solid State Sensor Arrays: Development and Applications, (25 April 1997); doi: 10.1117/12.275191
Show Author Affiliations
Sheng-Yuan Lin, Industrial Technology Research Institute (Taiwan)
Wen-Hsin Chan, Industrial Technology Research Institute (Taiwan)

Published in SPIE Proceedings Vol. 3019:
Solid State Sensor Arrays: Development and Applications
Morley M. Blouke, Editor(s)

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