Demosaicing images from colour cameras for digital image correlation

被引:23
|
作者
Forsey, A. [1 ]
Gungor, S. [1 ]
机构
[1] Open Univ, Milton Keynes MK7 6AA, Bucks, England
关键词
Digital image correlation; Demosaicing; Colour filter array; Colour camera; DISPLACEMENT MEASUREMENT;
D O I
10.1016/j.optlaseng.2016.05.006
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Digital image correlation is not the intended use for consumer colour cameras, but with care they can be successfully employed in such a role. The main obstacle is the sparsely sampled colour data caused by the use of a colour filter array (CFA) to separate the colour channels. It is shown that the method used to convert consumer camera raw files into a monochrome image suitable for digital image correlation (DIC) can have a significant effect on the DIC output. A number of widely available software packages and two in-house methods are evaluated in terms of their performance when used with DIC. Using an in-plane rotating disc to produce a highly constrained displacement field, it was found that the bicubic spline based in-house demosaicing method outperformed the other methods in terms of accuracy and aliasing suppression. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:20 / 28
页数:9
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