工业射线底片数字化图像质量快速评价技术研究

    Study of Rapid Evaluation Technology for Digital Image Quality of Industrial Radiographic Films

    • 摘要: 工业射线底片的数字化图像是实现无损检测及缺陷评定过程信息化、智能化的基础。由于在底片数字化过程中受底片黑度质量及人为操作影响,容易产生大量不合格数字化图像,如何快速、定量评价数字化图像质量已成为迫切需要解决的瓶颈问题。针对以上问题,提出了一种融合深度学习理论的底片数字图像质量端到端快速评价技术。首先,基于大量的实际存在的工业射线数字化图像数据,构建了基于二分类原则的数字化图像数据集。然后,构建了一种基于改进的VGGNet的数字化图像二分类评价方法。采用某企业管道环焊缝射线底片扫描数据对本文方法进行了说明和验证。结果表明:所提方法可以实现准确率为90.0%~95.7%的端到端的图像质量评价。

       

      Abstract: The digital image of industrial radiographic films is the basis for realizing the informationization and intelligence of non-destructive testing and defect assessment processes. Since the film digitization process is affected by film blackness quality and human operations, it is easy to produce a large number of unqualified digital images. How to quickly and quantitatively evaluate the quality of digital images has become an urgent bottleneck problem that needs to be solved. To solve the above problems, an end-to-end rapid evaluation technique for film digital image quality that integrates deep learning theory was proposed. Firstly, a digital image dataset based on the binary classification principle was built using a large amount of actually existing industrial ray digital image data. Then, a digital image binary classfication evaluation method based on improved VGGNet was constructed. The method was illustrated and verified by the radiographic scanning data of a pipeline girth weld of a certain enterprise. The results show that the proposed method can achieve end-to-end image quality evaluation with an accuracy of 90.0%-95.7%.

       

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