Welding Quality Inspection by Digital Radiography
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摘要: 提出了一种基于数字射线成像的焊缝质量检测方法。采用先进的非晶硅数字检测系统获取信息丰富的原始图像，叠加曝光降低图像噪声；依据射线衰减的指数规律对图像进行对数解调，凸现缺陷特征；运用非锐化掩模滤波对特征进行增强。使焊缝缺陷特征清晰，检测质量达到胶片最高级B级水平。Abstract: This paper briefly presents a method of inspecting welding lines on the basis of digital radiography. The advanced system based on the amorphous silicon detector was applied to acquire rich original image. And the noise was decreased by averaging the images. Log-calculation was used to show the defects in welding. The defects were amplified by the Unsharp masking algorithm. Then the image quality was improved to the B level the highest in the traditional film.
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Keywords:
- Digital radiographic testing /
- Welding line /
- Dynamic range /
- Unsharp masking
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[1] 机械工程学会无损检测分会，著.射线检测[M].北京：机械工业出版社,1997. [2] Kenneth R Castleman. Digital Image Processing[M].北京：清华大学出版社,1998. [3] 江林华，陈仕东，柴振明.基于非线性映射的X光数字减影图像的获取与处理[J].中国图像图形学报,2002,4A(9):773-775. [4] Andrea Polesel, Giovanni Ramponi, John Mathews V. Image enhancement via adaptive unsharp masking[J]. Image Processing,2000,3(9):505-510.
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