A Defect Grading Method for Digital Radiographic Image
نویسندگان
چکیده
In this paper, a defect grading method for digital radiographic images from CMOS x-ray linear array detector was put forward, which is based on a standard defect-grading comparison sample and a computer-aided defect interpretation method. A standard defect-grading comparison sample was designed and used to help measuring the distortion and magnification of the images, and to grade the defects in the images by comparison with the standard scale on the comparison sample. Furthermore, a computer-aided defect interpretation method was established by means of digital image defect extraction, labelling, and classification according to characteristic parameters calculated by home-made grading software. With the two tools mentioned above, the grading of overall defects and positioning of critical defects can be easily and effectively implemented.
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