Method for determining a reference image for use with a CCD or gamma capture instrument used with medical X-ray or gamma radiography whereby the effects of non-linear pixel detection element response is taken into consideration

摘要

Method involves acquisition of a black image (IN), i.e. an image with no detector exposure, and two images (l1, l2) obtained with the detector operating within its linear range without any object. A reference image is created using a mathematical formula relating pixel brightness values from the different images.