Screen Holdings Co., Ltd.

Dainippon Screen Mfg. Co., Ltd.

Koji Matsuo

Hiroyuki Segawa

Shigenori Arizono

Ryoko Sakurai

Kiyoshi Imai

Satoru Kiyohara

Kohei Ueda

Toshio Manki

Kenta Nagai

Kazuo Isoguchi

Soichi Kimura

Sho Tomioka

Tetsuyuki Kitayama

An editing device generates a first public key and a first private key, receives a manuscript data encrypted using the first public key from an ordering device, and decrypts the encrypted manuscript data using the first private key. The editing device generates, based on the manuscript data, print data encrypted using a second public key generated in a RIP processing device, and deletes the first private key after finishing execution of a job. Using a third public key, the editing device encrypts a log which shows an execution process of the job, the log including information that a finish processing has been executed. The editing device may store the first private key before starting execution of the job, and may control whether the job is to be executed, based on a job ID received from the ordering device.

Job execution method and job execution device

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

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.

Color chart creating method and a color correcting method

When a differential page image is created by comparing a target inspection page image and an inspection page image, differential page image attribute information which is an inspection result is created by acquiring attribute information of an image region of the target inspection page image and an image region of the inspection page image corresponding to the differential page image, from target inspection page image data and inspection page image data.

Image inspection device, program product, and method comparing target print page data and display page data to create differential page image attribute information

A preflight check unit in a printing control apparatus includes a sub-preflight check unit, an object page determination unit, a main preflight check unit, and a preflight result output unit. The sub-preflight check unit obtains resource use information and part use information. The object page determination unit determines object pages to be subjected to the preflight check, based on the resource use information and the part use information, and writes object page information indicating the object pages in a storage unit. The main preflight check unit reads the object page information from the storage unit to perform preflight check on the object pages indicated by the object page information. The preflight result output unit outputs a preflight result.

Printing control apparatus, recording medium having recorded thereon printing control program, and printing control method

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Kyoto, Japan

Koji Matsuo