Automated Internal Classification of Beadless Chinese ZhuJi Freshwater Pearls based on Optical Coherence Tomography Images.
Optical coherence tomography (OCT) has been applied to inspect the internal defect of beadless Chinese ZhuJi fleshwater pearls. A novel fully automated algorithm is proposed to classify between normal and defective sub-layer in nacre layer. Our algorithm utilizes the graph segmentation approach to estimate the up and down boundaries of defect sub-layers from flattened and cropped image, and also proposes the strategy for edge and weight construction in segmentation process. The vertical gradients of boundary pixels are used to make grading decision. The algorithm is tested by typical pearl samples, and achieves 100% classification accuracy. The experiment result shows the feasibility and adaptability of the proposed approach, and proves that the OCT technique combined with proposed algorithm is a potential tool for fast and non-destructive diagnosis of internal structure of beadless pearl.
School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China.
Yang
Y
Zhou
Institute Zhejiang Provincial key Lab for Chem&Bio Processing Technology of Farm Product, Hangzhou, 310023, China.
Tiebing
T
Liu
School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China.
Yang
Y
Shi
Center of Engineering Training, Zhejiang University of Science and Technology, Hangzhou, 310023, China.
Zhengwei
Z
Chen
Institute Zhejiang Provincial key Lab for Chem&Bio Processing Technology of Farm Product, Hangzhou, 310023, China.
Jianwei
J
Mao
School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China.
Wujie
W
Zhou
IEEE Trans Med Imaging. 2013 Mar;32(3):531-43
23086520
J Biomed Opt. 2007 Jul-Aug;12(4):041205
17867794
Br J Ophthalmol. 2005 Apr;89(4):489-92
15774930
Opt Express. 2010 Aug 30;18(18):19413-28
20940837
Biomed Opt Express. 2015 Apr 28;6(5):1904-18
26137390
Opt Express. 2010 Jun 21;18(13):13468-77
20588477
PLoS One. 2013 Dec 26;8(12):e82922
24386127
Analyst. 2013 Jun 21;138(12):3335-46
23636144
Sci Rep. 2015 Sep 11;5:13992
26358529
Nat Med. 2013 Feb;19(2):238-40
23314056
Biomed Opt Express. 2013 Nov 01;4(12):2712-28
24409375
Biomed Opt Express. 2016 Jan 08;7(2):409-19
26977350
Opt Lett. 2016 Jan 15;41(2):250-3
26766686
Opt Express. 2011 Mar 28;19(7):6420-32
21451670
Biomed Opt Express. 2014 Jan 07;5(2):348-65
24575332
Opt Lett. 2016 Mar 1;41(5):994-7
26974099