Radiation image read-out and gradation processing method and apparatus with means to select between different gains for gradation processing

摘要

In a system for reading out a radiation image stored in a stimulable phosphor sheet and processing the gradation of the image, final read-out is conducted by use of a read-out condition GP determined on the basis of image information obtained by preliminary read-out. On the basis of the image recording portion and/or image recording conditions, the system selects whether to directly subject the output of the final read-out conducted by use of a read-out condition GP to a gradation processing under a gradation processing condition GH predetermined in accordance with the image recording portion and/or image recording conditions or to subject the output to a gradation processing effected by use of a gradation processing condition A(GP)xGH where A(GP) denotes the function determined by the image recording portion and/or image recording conditions.