Color conversion device, color conversion method, recording medium, and color separation device

摘要

Granularity level adjustment areas, in each of which a granularity level of an image is adjusted, are extracted. Each of target values for the granularity levels in the extracted granularity level adjustment areas is set. The granularity level is calculated, and the device color signals in the granularity level adjustment areas are converted, such that the calculated granularity level is closer to the target value than before the device color signals are converted, and such that the new device color signals fall within an isochromatic range in a device-independent color space.

主权项

1. A color conversion apparatus for converting colors of a print that is produced using a plurality of color materials, comprising:
a color signal input unit for inputting device color signals associated with respective amounts of used color materials; an adjustment area extractor for extracting at least one of granularity level adjustment areas, in which a granularity level of an image is adjusted, from an image area represented by the device color signals input from the color signal input unit; a target value setter for setting a target value for the granularity level in the one of the granularity level adjustment areas that is extracted by the adjustment area extractor; a granularity level calculator for calculating the granularity level in the extracted one of the granularity level adjustment areas; and an isochromatic converter for converting the device color signals in the extracted one of the granularity level adjustment areas into new device color signals, such that the granularity level calculated by the granularity level calculator is closer to the target value set by the target value setter than before the device color signals are converted, and such that the new device color signals fall within an isochromatic range in a device-independent color space.