Color images reading apparatus having transformation table formed base on average values of plural color component signals

摘要

A color image reading apparatus has a reading unit for color- separating and reading a color image, an operating unit for obtaining an average value of each of a plurality of color-component signals output from the reading unit, and a transforming unit for transforming the plurality of color-component signals from the reading unit into a plurality of color-density signals on the basis of the average values of the plurality of color-component signals obtained by the operating unit.