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Proceedings Paper

Sampling efficiency in digital camera performance standards
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Paper Abstract

One of the first ISO digital camera standards to address image microstructure was ISO 12233, which introduced the SFR, spatial frequency response, based on the analysis of edge features in digital images. The SFR, whether derived from edges or periodic signals, describes the capture of image detail as a function of spatial frequency. Often during camera testing, however, there is an interest in distilling SFR results down to a single value that can be compared with acceptable tolerances. As a measure of limiting resolution, it has been suggested that the frequency at which the SFR falls to, e.g., 10%, can be used. We use this limiting resolution to introduce a sampling efficiency measure, being considered under the current ISO 12233 standard revision effort. The measure is the ratio of limiting resolution frequency to that implied by the image (sensor) sampling alone. The rationale and details of this measure are described, as are example measurements. One-dimensional sampling efficiency calculations for multiple directions are included in a two-dimensional analysis.

Paper Details

Date Published: 28 January 2008
PDF: 5 pages
Proc. SPIE 6808, Image Quality and System Performance V, 680805 (28 January 2008); doi: 10.1117/12.766359
Show Author Affiliations
Peter D. Burns, Carestream Health, Inc. (United States)
Don Williams, Image Science Associates (United States)

Published in SPIE Proceedings Vol. 6808:
Image Quality and System Performance V
Susan P. Farnand; Frans Gaykema, Editor(s)

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