A reversible encryption technique for storing weld piece related information during digital archiving of industrial radiographs

Archival of digital radiographs is the growing need in weld industries. However in addition to radiographs, the information about the weld piece must also be stored for future documentation. However the information about the radiographs may be confidential and should not be stored as such. Also matching the radiographs with the corresponding radiographs is also a major area of concern. Hence it necessitates an effective encryption technique that hides the information about the weld piece in the radiograph itself. The proposed technique involves hiding the nature of the weld defect in the radiographs. The paper also proposes an extraction technique to effectively extract the signature image.