Digital image processing system and digital mammography system

摘要

A digital image processing system includes: a memory for storing a gradation conversion table which correlates inputted image signals to output gradation values in the output device; and a gradation conversion unit for converting an inputted image signals that indicate the digital image, in accordance with the gradation conversion table, wherein the gradation conversion table is determined so that a gradient which represents change rate of gradation value between neighboring output gradation values, is kept the maximum over a predetermined range of the output gradation values.