Blackening processing method and apparatus

摘要

Information representing a template, which has an irradiation field shape determined by a collimation plate used in an operation for recording a radiation image to be processed, is stored. An irradiation field on the radiation image is defined in accordance with the template. The irradiation field may be defined by carrying out matching of the template and the radiation image with each other. A blackening process for a region outside of the thus defined irradiation field on the radiation image is then carried out. An appropriate blackening process is thereby carried out quickly.