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Optical Engineering

Contrast sensitivity function calibration based on image quality prediction
Author(s): Yu Han; Yunze Cai
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Paper Abstract

Contrast sensitivity functions (CSFs) describe visual stimuli based on their spatial frequency. However, CSF calibration is limited by the size of the sample collection and this remains an open issue. In this study, we propose an approach for calibrating CSFs that is based on the hypothesis that a precise CSF model can accurately predict image quality. Thus, CSF calibration is regarded as the inverse problem of image quality prediction according to our hypothesis. A CSF could be calibrated by optimizing the performance of a CSF-based image quality metric using a database containing images with known quality. Compared with the traditional method, this would reduce the work involved in sample collection dramatically. In the present study, we employed three image databases to optimize some existing CSF models. The experimental results showed that the performance of a three-parameter CSF model was better than that of other models. The results of this study may be helpful in CSF and image quality research.

Paper Details

Date Published: 11 November 2014
PDF: 7 pages
Opt. Eng. 53(11) 113107 doi: 10.1117/1.OE.53.11.113107
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Yu Han, Jiangsu Automation Research Institute (China)
Yunze Cai, Shanghai Jiao Tong Univ. (China)


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