Fig. 1. Top: Radiographic image of Full-size image (<1 K) wall thickness austenitic pipe obtained using the conventional X-ray system. The visualized part of the pipe has horizontal and vertical sizes of about 92 and Full-size image (<1 K), respectively. The image is a result of median filtering. Its size is 1143×179 (after zooming the original digital version with factor 2) with pixel resolution Full-size image (<1 K). Middle: The image is a result of subtraction from each profile its closest parabola. Bottom: The image is a result of subtraction from each profile its smoothed version.
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