Screen Holdings Co., Ltd.

Shigenori Arizono

Ryoko Sakurai

Kohei Ueda

Koji Matsuo

Kenichi Yokouchi

Satoru Kiyohara

Asuka Muramatsu

Tomotaka Kato

Hiroki Endo

Yuya Takagi

Kensuke Usui

The inkjet printing apparatus is configured to be able to execute a batch adjustment process of performing a plurality of times of adjustment processes related to printing in succession based on one instruction from an outside. The conveyance control unit maintains the conveyance speed at a first speed in a period when a chart printing process is performed and a period when a chart imaging process is performed. The conveyance control unit decreases the conveyance speed from the first speed to the second speed after the end of the chart imaging process in an adjustment process except for an adjustment process that is performed last in the batch adjustment process, and increases the conveyance speed from the second speed to the first speed before the start of the chart printing process in an adjustment process that is performed next.

Printing apparatus and batch adjustment method therefor

A granularity check chart is printed and granularity is evaluated for each area representing a combination of a color value of blue and a color value of cyan and magenta. Thereafter, an unusable region regarding combinations of a color value of blue and a color value of cyan and magenta is determined on the basis of evaluation results. Then, corresponding relationships among a color value of cyan and magenta before spot color separation, a color value of blue after the spot color separation, and a color value of cyan and magenta after the spot color separation are determined so that each combination of a color value of blue and a color value of cyan and magenta after the spot color separation is not included in the unusable region, and a spot color separation LUT is created so that the corresponding relationships are satisfied.

Color conversion table creation method, printing method, and color conversion method

After obtaining printing data, a user is allowed to specify regions whose amounts of ink consumed are estimated using high-resolution images, by which two regions (high-resolution estimation areas and low-resolution estimation areas) are set in a printing region. Thereafter, the amounts of ink (first amounts of ink) consumed are estimated using the high-resolution images regarding the regions set as the high-resolution estimation areas, and the amounts of ink (second amounts of ink) consumed are estimated using low-resolution images regarding the regions set as the low-resolution estimation areas. Finally, the total amount of ink consumed by printing is calculated from the first amounts of ink and the second amounts of ink.

Method of estimating amount of ink consumed and apparatus for estimating amount of ink consumed

After obtaining a print job (step S), adjustment data is obtained based on job information included in the print job (step S). After determining an estimation range (step S), image data to be printed is corrected using the adjustment data (step S). Then, an amount of ink which is predicted to be consumed by printing of an image represented by the corrected image data is calculated (step S). Furthermore, when flushing is performed, an amount of ink which is predicted to be consumed by flushing is calculated (step S).

Method of estimating amount of ink consumed, apparatus for estimating amount of ink consumed, and printing system

A method for limiting the amount of ink discharged in a photocurable inkjet printing apparatus includes a conversion step of converting, an input grayscale value to the amount of ink; and a limit value setting step of setting, a limit value of the amount of ink discharged, for each of a secondary color not including a K color component, a tertiary color not including a K color component, and a color including a K color component. In the limit value setting step, the limit value for the tertiary color not including a K color component is set to a smaller value than the limit value for the secondary color not including a K color component, and the limit value for the color including a K color component is set to a smaller value than the limit value for the secondary color not including a K color component.

Method for limiting amount of ink discharged, method for creating color conversion table, gloss determination device, recording medium having recorded therein gloss determination program, and gloss determination method

As image processing apparatus includes a color converteras a color converting device. The color converterhas, as main functional components for carrying out color conversion of halftone of a spot color, a spot color information acquiring unitfor acquiring spot color information from manuscript data, a spot color Lab acquiring unitfor acquiring L*a*b* values in an L*a*b* color space when the dot percentage of the spot color is 100%, a first calculating unitfor calculating halftone L*a*b* values, using the L*a*b* values at 100% dot percentage of the spot color acquired by the spot color Lab acquiring unitand a dot percentage of the spot color in a printing target portion of the spot color, and a second calculating unitfor converting, using an output ICC profile, the halftone L*a*b* values calculated by the first calculating unitinto CMYK values.

Color converting apparatus and a color converting method

In printing image data for printing a color chart with a printing machine, instead of using a TAC value which is a total of CMYK values given to one pixel as a limit of ink amount supplied to a printing medium as done conventionally, creation of a color chart having a large color gamut is realized by considering and adjusting the amount of inks per unit area actually consumed at the time of printing and drying performance of each ink.

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Kyoto, Japan

Shigenori Arizono