METHOD AND DEVICE FOR EVALUATING DIGITAL RADIATION IMAGE

摘要

PROBLEM TO BE SOLVED: To accurately obtain the evaluated value of the graininess or image quality to specified exposure by fixing the correction curve of the evaluated value to the exposure from two or more evaluated values concerning the graininess or the image quality of a digital image and obtaining the evaluated value of the graininess or the image quality of the digital image in the specified exposure. SOLUTION: A digital image data acquiring means 12 obtains the digital image by performing specified processing to the image recorded in a radiation detector by using radiation and obtains two or more images recorded by varying the exposure of radiation in the case of performing evaluation concerning the graininess or the image quality of the digital image. A graininess evaluating means 14 and an image quality evaluating means 16 obtain two or more evaluated values concerning the graininess or the image quality of the digital image based on the images for every image. The correction curve of the evaluated value to the exposure is fixed based on the two or more evaluated values so as to obtain the evaluated values of the graininess or the image quality of the digital image in the specified exposure by using the correction curve.