Overcoming the blooming effect on autofocus by fringe detection
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
9404
Date Issued
2015
Author(s)
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.
SDGs
Type
conference paper