Ricoh Company, Ltd.

Masakazu Yoshida

Takashi Kimura

Masanori Hirano

Junji Nakai

Yoshihisa Ohta

Hiroyoshi Matsumoto

Shigetoshi Hosaka

Taku Satoh

Toshihito Kamei

Naoki Nakano

Toshitaka Osanai

Shigetaka Sakakibara

Takahiro Ike

Souichi Nakazawa

Koji Nagai

Tatsuro Watanabe

Hiroyuki Hiratsuka

Tomohiro Inoue

Naoya Morohoshi

Yasunobu Takagi

Arata Yamaguchi

Takayuki Ito

Takashi Mori

Michio Umezawa

Shinichi Hatanaka

Yoshiaki Hoshino

Hironobu Murai

Hiroaki Sagae

Makoto Tanaka

Takahiro Yoshida

Daisuke Suzuki

Mikio Ohashi

Shigeaki Kimura

Yohji Hirose

Taeko Takahashi

Hironobu c/o Ricoh Software Inc Murai

According to an aspect of the present invention, a printing apparatus includes a plasma treatment unit configured to acidify at least a surface of a print medium by applying plasma treatment to the surface of the print medium, a first primer applying unit configured to apply primer treatment by applying treatment liquid to the surface of the print medium having undergone the plasma treatment, and a first recording unit configured to perform recording by inkjet recording on the print medium having undergone the primer treatment.

Printing system, printing apparatus, and printed-matter production method

A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.

Printing apparatus and printed material manufacturing method

A printing apparatus includes an acidification treatment unit that acidifies at least a surface of a treatment object by irradiating the treatment object with plasma; an inkjet recording unit that records to the treatment object having been acidified by the acidification pretreatment unit in an inkjet recording system; and a control unit that specifies an ink to be used by the inkjet recording unit from at least two types of inks having different properties, based on the type of the treatment object and an amount of plasma energy used in a plasma treatment performed by the acidification treatment unit or based on a pH value of the surface of the treatment object.

Printing apparatus, printing system, and printed material manufacturing method

A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object, a recording unit that performs an inkjet recording process on the surface of the treatment object subjected to the plasma treatment by the plasma treatment unit, and a control unit that adjusts plasma energy for the plasma treatment according to a type of an ink used in the inkjet recording process.

Printing apparatus, treatment object modifying apparatus, printing system, and printed material manufacturing method

An image processing apparatus is disclosed. The image processing apparatus includes a color conversion processing unit which obtains CMY data from input color space coordinate data of image data, and an output data generating unit which generates output data by forming CMYK data by using a result output from a color conversion processing section. The color conversion processing section includes an optimum color reproduction data structure which gives the CMY data for obtaining a full color image optimally reproduced from the input color space coordinate data, and a color material using amount reducing data structure for outputting the input color space coordinate data by reducing the color material using amount with the use of a reference value in which the color material using amount is increased for a hue of an output image giving a high psychological effect and is decreased for a hue of the output image giving a low psychological effect.

Image processing apparatus, image processing method, and computer-readable recording medium storing image processing program for color conversion of image data

A disclosed image processing apparatus performs an image processing operation to execute double-side printing on both sides of an image forming medium. The image processing apparatus forms a dot font including a dot pattern of a character in a character image that has undergone a halftone process using a predetermined coefficient for mitigating show-through when the double-side printing is performed; forms a correction dot for making a correction to reduce step-like irregularities along an outline portion of the character in the character image, which correction dot is formed based on an arrangement position, a color, and a dot size of the correction dot for reproducing a gradation that has undergone the halftone process using said predetermined coefficient; and combines the dot font and the correction dot.

Image processing apparatus to correct an image during double-sided printing

An image processing apparatus quantizes multi-level image data of n colors, where n&#x2267;2, by performing an error diffusion processing. The image processing apparatus includes: a dot arrangement determining unit that determines either one of an essential dot count and an essential recording material amount when the multi-level image data of n colors is converted into multi-level image data of m colors, where n&#x3e;m&#x2267;1, by the error diffusion processing; and a color arrangement determining unit that performs the error diffusion processing on each color component of the multi-level image data of n colors, calculates either one of a dot count and a recording material amount for each color component, and determines an arrangement of either one of the dot count and the recording material amount for each color component within a range of a corresponding one of the essential dot count and the essential recording material amount determined by the dot arrangement determining unit.

Image processing apparatus and method for determining arrangement of dot count or recording material amount by error diffusion process

An image processing apparatus for converting input image data into output image data for an image forming apparatus configured to output an image with the use of coloring material, which includes a unit configured to perform a coloring-material usage amount reduction process of converting the input image data into the output image data such that an amount of the coloring material used for color-printing the input image data becomes a target coloring-material usage amount defined based on a monochrome-printing coloring-material usage amount required for monochrome-printing the input image data.

Image processing apparatus, image processing method, program, recording medium, printing system, image forming apparatus

An image forming method includes discharging a droplet of a recording fluid via nozzles of a recording head onto a print medium; performing a main scan in which the print medium is scanned in a main scan direction; performing a sub-scan in which the print medium is scanned in a sub-scan direction; determining an overlap region in an image region that is formed by a single main scan; and performing an overlap control by forming an image in the overlap region through a plurality of main scans while the print medium is moved in the sub-scan direction by a feed amount L, wherein L=(n&#x2212;x)d&#x2212;md, where n is a number of the nozzles in the recording head; x is a number of the nozzles in the overlap region; d is a nozzle pitch; and m is a feed correcting coefficient (0&#x3c;m&#x3c;1).

Image forming method and image forming apparatus

An image forming apparatus performs a 1-pass recording by a single main scan with respect to a recording medium by a nozzle group including different overlapping nozzles that scan the same overlapping region on the recording medium to record dots. Alternatively, a multi-pass recording is performed by a plurality of main scans with respect to the overlapping region by the same nozzle group or by different nozzle groups. The recording in a central portion of the overlapping region is performed by placing emphasis on the succession or continuity of the dots, while the recording in boundary portions of the overlapping region is performed by placing emphasis on the scattering of the dots.

Image forming apparatus, image forming method and computer-readable storage medium

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Kanagawa, Japan

Masakazu Yoshida