Research on image preprocessing techniques for real-time radiography inspection

Dahai Ren; Zheng You; Sun Changku; Ye Shenghua

doi:10.1117/12.385493

13 May 2000 Research on image preprocessing techniques for real-time radiography inspection

Dahai Ren, Zheng You, Sun Changku, Ye Shenghua

Proceedings Volume 3993, Nondestructive Evaluation of Aging Materials and Composites IV; (2000) https://doi.org/10.1117/12.385493
Event: SPIE's 5th Annual International Symposium on Nondestructive Evaluation and Health Monitoring of Aging Infrastructure, 2000, Newport Beach, CA, United States

Abstract

In this paper, the image preprocessing techniques are studied in detail combining with the characteristics of real-time radiography. In view of the characteristics of radiant attenuation, an image processing method is presented to make the relationship between image gray scale and workpiece thickness linear. In order to get better image contrast, an image stretching method based on fuzzy transformation is designed by which the image is effectively enhanced. Meanwhile, another algorithm is also proposed to avoid the complexity of above method. Moreover, the study is carried out to the influence of radiation source focus, which is a very important factor to image quality in real-time radiography. The mathematical model is established for the influence of radiation source focus on real-time radiography image. On the basis of this model, the corresponding algorithm is proposed to eliminate its influence. All these algorithms are studied in detail with corresponding results presented.

Citation Download Citation

Dahai Ren, Zheng You, Sun Changku, and Ye Shenghua "Research on image preprocessing techniques for real-time radiography inspection", Proc. SPIE 3993, Nondestructive Evaluation of Aging Materials and Composites IV, (13 May 2000); https://doi.org/10.1117/12.385493

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