Digitized Radiograph Processing for Better Vision and Evaluation

Abstract:- In this investigation, the thickness loss and defects size were evaluated by gamma radiography technique. Defects which were studied were flat bottom holes. For this purpose, Foma R7 radiographs were digitized after processing in a Laser scanner. Some digital image processing filters also were applied for noise smoothing. The information of images was saved in the matrix form of gray levels. Gray levels were changed to optical densities by assessment the reference radiograph. The density of each point of radiograph was compared with a reference point and by considering the effective linear atomic absorption coefficient thickness loss in any point of samples was quantified in Matlab environment. Results indicated that this method can be used successfully for providing the thickness profile of pipe and plates