Transactions of Nanjing University of Aeronautics & Astronautics
Image Quality Improvement for Underwater Visual Inspections of Nuclear Power Plants
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Abstract:
Visual inspection of the key components of nuclear power plants （NPPs） is important for NPP operation and maintenance. However， the underwater environment and existing radiation will lead to image degradation， thus making it difficult to identify surface defects. In this study， a method for improving the quality of underwater images is proposed. By analyzing the degradation characteristics of underwater detection image， the image enhancement technology is used to improve the color richness of the image， and then the improved dark channel prior （DCP） algorithm is used to restore it. By modifying the estimation formula of transmittance and background light， the correction of insufficient brightness in DCP restored image is realized. The proposed method is compared with other state-of-the-art methods. The results show that the proposed method can achieve higher scores and improve the image quality by correcting the color and restoring local details， thus effectively enhancing the reliability of visual inspection of NPPs.
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Project Supported:
This work was supported by the National Natural Science Foundations of China （Nos.51674031，51874022）.
Clc Number:
TN911.73
CHINA AERO-SCIENCES
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