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...Ndt net www document information search docs php id state of the art weld seam inspection by radiographic testing part i image processing romeu ricardo da silva domingo mery departamento de ciencia la computacion pontificia universidad catolica chile e mail dmery ing puc cl http abstract over last years there has been a large amount research attempting to develop an automatic or semiautomatic system for detection and classification defects in continuous welds examined radiography are basically two types areas this field which consists improving quality images segmenting regions interest pattern recognition aims at detecting classifying segmented because complexity problem number techniques have investigated these paper represents report on is divided into parts mentioned above presented compared each basic step development identification deals with first keywords nondestructive analysis introduction experiments detect using x rays took place laboratory scale yale university barely one ...