像素
计算机视觉
光度立体
人工智能
光学
职位(财务)
光场
光源
计算机科学
曲面(拓扑)
物理
数学
图像(数学)
几何学
财务
经济
作者
Sanao Huang,Ming Li,Xu Ke,Yingjie Shi
出处
期刊:核动力工程
日期:2021-08-15
卷期号:42 (4): 191-197
标识
DOI:10.13832/j.jnpe.2021.04.0191
摘要
To improve the visual inspection of nuclear power plant components, this study introduces the technology of three-dimensional reconstruction framework based on photo metric stereo under near-field LED lighting. An iterative algorithm is proposed to estimate the K value of different light sources and the light6 intensities for various image pixels. Combined with the calculation method of the spatial position of the light source and the detected surface points, the light intensity and light direction of different points on the detected surface are estimated under the illumination of near-field LED point light source. A surface defect detection system is designed based on this technology, and it is verified by experiments on surface damage samples and actual nuclear power equipment. The results show that this system can obtain three-dimensional surface data, and for scratch-type defects, it can further achieve accurate depth measurement. Therefore, it can effectively improve the detection ability of surface defects.
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