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Proceedings Paper

Estimation error in image quality measurements
Author(s): Peter D. Burns
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Paper Abstract

The development and adoption of standard image quality measurement and analysis methods have helped both the evaluation of competing imaging products and in technologies. Inherent in the interpretation of results from any particular evaluation, however, are the variation of the method itself, the sampling of test images, equipment, and test conditions. Here we take a statistical approach to measurement variation, and interpret the objective as being the estimation of particular system or image properties, based on data, collected as part of standard testing. Measurement variation was investigated for two signal-transfer methods commonly used for digital camera and scanner evaluation: the ISO 12233 slanted-edge spatial frequency response and the dead-leaves method for texture-MTF evaluation being developed by the Camera Phone Image Quality (CPIQ) Initiative. In each case, the variation due to the selection of analysis regions was computed by repeated analysis. The slanted-edge methods indicated a relative error in the range of 1-3% depending on the nature of the region selection. For the dead-leaves method, the amplitude spectrum (square root of the noise-power spectrum) showed a relative error of approximately 4-6%, however, this can be reduced by applying spectral estimation methods commonly used in image noise analysis.

Paper Details

Date Published: 24 January 2011
PDF: 8 pages
Proc. SPIE 7867, Image Quality and System Performance VIII, 78670H (24 January 2011); doi: 10.1117/12.872626
Show Author Affiliations
Peter D. Burns, Carestream Health, Inc. (United States)


Published in SPIE Proceedings Vol. 7867:
Image Quality and System Performance VIII
Susan P. Farnand; Frans Gaykema, Editor(s)

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