Real-Time Color Image Improvement System for Visual Testing of Nuclear Reactors

Naoki HOSOYA  Atsushi MIYAMOTO  Junichiro NAGANUMA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E101-D   No.5   pp.1243-1250
Publication Date: 2018/05/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2017MVP0007
Type of Manuscript: Special Section PAPER (Special Section on Machine Vision and its Applications)
Category: Machine Vision and its Applications
Keyword: 
nuclear reactor,  visual testing (VT),  video image,  radiation noise,  signal enhancement,  

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Summary: 
Nuclear power plants require in-vessel inspections for soundness checks and preventive maintenance. One inspection procedure is visual testing (VT), which is based on video images of an underwater camera in a nuclear reactor. However, a lot of noise is superimposed on VT images due to radiation exposure. We propose a technique for improving the quality of those images by image processing that reduces radiation noise and enhances signals. Real-time video processing was achieved by applying the proposed technique with a parallel processing unit. Improving the clarity of VT images will lead to reducing the burden on inspectors.