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Proceedings Paper

Overcoming the blooming effect on autofocus by fringe detection
Author(s): Shao-Kang Huang; Dong-Chen Tsai; Homer H. Chen
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Paper Abstract

In the presence of light bloom or glow, multiple peaks may appear in the focus profile and mislead the autofocus system of a digital camera to an incorrect in-focus decision. We present a novel method to overcome the blooming effect. The key idea behind the method is based on the observation that multiple peaks are generated due to the presence of false features in the captured image, which, in turn, are due to the presence of fringe (or feather) of light extending from the border of the bright image area. By detecting the fringe area and excluding it from focus measurement, the blooming effect can be reduced. Experimental results show that the proposed anti-blooming method can indeed improve the performance of an autofocus system.

Paper Details

Date Published: 27 February 2015
PDF: 6 pages
Proc. SPIE 9404, Digital Photography XI, 94040M (27 February 2015); doi: 10.1117/12.2074816
Show Author Affiliations
Shao-Kang Huang, National Taiwan Univ. (Taiwan)
Dong-Chen Tsai, National Taiwan Univ. (Taiwan)
Homer H. Chen, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 9404:
Digital Photography XI
Nitin Sampat; Radka Tezaur; Dietmar Wüller, Editor(s)

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