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http://dx.doi.org/10.9708/jksci.2017.22.08.015

Scene-based Nonuniformity Correction Complemented by Block Reweighting and Global Offset Initialization  

Hong, Yong-hee (LIG Nex1)
Lee, Keun-Jae (LIG Nex1)
Kim, Hong-Rak (LIG Nex1)
Jhee, Ho-Jin (LIG Nex1)
Publication Information
Journal of the Korea Society of Computer and Information / v.22, no.8, 2017 , pp. 15-23 More about this Journal
Abstract
In this paper, the block reweighting and global offset initialization methods are proposed to complement the improved IRLMS algorithm which is the effective algorithm in registration based SBNUC algorithm. Proposed block weighting method reweights the error map whose abnormal data are excluded. The global offset initialization method compensates the global nonuniformity initially. The ordinary registration based SBNUC algorithm is hard to compensate global nonuniformity because of low scene motion. We employ the proposed methods to improved IRLMS algorithm, and apply it to real-world infrared raw image stream. The result shows that new implementation provides 3.5~4.0dB higher PSNR and convergence speed 1.5 faster then the improved IRLMS algorithm.
Keywords
FPA; FPN; improved IRLMS; infrared; registration; scene based nonuniformity correction;
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