Fuji Xerox Co., Ltd.

Ryouichi Satoh

Yoshiharu Hibi

Toshifumi Takahira

Masaomi Sakamoto

Kazuyuki Takahashi

Pauvi Sulistio

Toshiyuki Yano

Yuichi Nishikuni

Masao Seki

Toshio Koriyama

Toshie Kobiyama

An image processor includes: a receiving unit that receives an input of image data in a first color space; a first color conversion unit that performs color conversion of the image data received by the receiving unit to image data formed of a first combination of color components in a second color space; a second color conversion unit that performs color conversion of the image data received by the receiving unit to image data formed of a second combination of color components in the second color space, the second combination being different from the first combination; and an image generating unit that generates an image based on at least the image data generated by the first and second color conversion units. Each of the first and second combinations includes a smaller number of color components than the number of color materials to be used in formation of an image.

Image processor, image forming system, image processing method and computer readable medium

The image processing apparatus includes: a color conversion unit color-converting an image signal of a first color space into that of a second color space with a color conversion characteristic defining a correspondence relationship between the image signals; an adjustment unit adjusting the image signal of the second color space with adjustment conversion factor groups that is for adjusting it in accordance with a change in the color conversion characteristic, and is set for respective types of sheets on which an image is to be printed according to the image signal of the second color space; a calculation unit calculating the adjustment conversion factor groups; a memory storing an associating factor group associating, with each other, the adjustment conversion factor groups; and an update unit updating the adjustment conversion factor groups according to the calculated adjustment conversion factor group of one sheet and the stored associating factor group.

Image processing apparatus, image forming system, image processing method and computer readable medium for calibrating profiles of multiple sheets

The image processing apparatus includes: a color conversion unit color-converting an image signal of a first color space into that of a second color space by using a color conversion characteristic defining a correspondence relationship between the image signals of the first and second color spaces; an adjustment unit adjusting the image signal of the second color space, in accordance with a change in the color conversion characteristic; a correction unit correcting a conversion factor group for adjustment used when the image signal of the second color space is adjusted; and a judgment unit judging whether the conversion factor group needs to be corrected, on the basis of a color measurement result of a second color sample group including color samples the number of which is smaller than that of color samples in a first color sample group on which color measurement is performed to create the conversion factor group.

Image processing apparatus, image forming system, image processing method and computer readable medium

The color signal converting apparatus is provided with: a color signal receiving unit that receives input of first color signals; and a converting unit that performs a conversion of the first color signals received by the color signal receiving unit, into second color signals. The converting unit performs the conversion to make a total sum of color component values of each of the second color signals equal to or smaller than an upper limit value set for each of the second color signals.

Color signal converting apparatus, image forming apparatus, color signal conversion method and computer readable medium

An image processing method is provided. The image processing method includes: generating profiles for color reproduction, classified for each of recording papers, from at least one of particular characteristic data of the each recording paper, which is generated on the basis of factors that affect color reproduction and particular generation information of the each recording paper, which is obtained by printing plural patch patterns at the recording paper and performing colorimetry of the printed patch patterns; and when implementing basic extraction control for extracting a profile that matches in at least one of the characteristic data and the generation information, if no profile that matches in at least one of the characteristic data and the generation information is extracted, extracting a profile that approximates in accordance with a pre-specified order of priority determination procedure to be a candidate.

Image processing method and image forming device for generating profiles for color reproduction

An image forming control apparatus includes: a gradation correction curve generator and a calibration data generator. The gradation correction curve generator generates a gradation correction curve based on a correspondence between an output instruction values each representing a density of an image to be formed by an image forming apparatus and actual density values each representing a density of the image formed by the image forming apparatus. The gradation correction curve represents a correspondence between predetermined standard density values and the output instruction values. When an output instruction value corresponding to a maximum standard density value is smaller than a maximum output instruction value, the calibration data generator corrects the gradation correction curve so that the output instruction value corresponding to the maximum standard density value coincides with the maximum output instruction value, and generates the calibration data based on the corrected gradation correction curve.

Growing community of inventors

Kanagawa, Japan

Ryouichi Satoh