This article [Opt. Eng. 51, 077008 (2012)] was originally published on 18 Jul. 2012 with reversed captions in Figs. 3 and 4. The corrected figures and captions are reprinted below.
Scenario in which is better than , , and in capturing horizontal variation. Each grid represents a pixel or several pixels.
(a) Original images, (b) GIPFR, (c) horizontal IPF, (d) horizontal VPF, (e) horizontal HPF.
The manuscript was corrected online on 20 November 2012.