Ricoh Company, Ltd.

Nec Corporation

Lion Corporation

Masanori Hirano

Masakazu Yoshida

Takashi Kimura

Yoshihisa Ohta

Shigetoshi Hosaka

Shigetaka Sakakibara

Takahiro Ike

Takayuki Ito

Naoya Morohoshi

Toshihito Kamei

Naoki Nakano

Tomohiro Inoue

Shinichi Hatanaka

Yoshiaki Hoshino

Takashi Mori

Michio Umezawa

Yasunobu Takagi

Taku Satoh

Hironobu Murai

Kiyofumi Nagai

Takahiro Yoshida

Akihiko Matsuyama

Naoki Kikuchi

Hiroshi Adachi

Shotaro Takeuchi

Tohru Ohshima

Norimasa Sohgawa

Satoshi Ohuchi

Daisuke Suzuki

Mikio Ohashi

Kimito Abe

Yusuke Nonoyama

Yoshiyuki Ishiyama

Shigeaki Kimura

Koji Shibuya

Hiroyuki Kiyoi

Takahiko Sugiura

Daiki Marumo

Arata Yamaguchi

Kyohei Hamada

Taeko Takahashi

Motoyasu Ohdera

Yoshio Asai

Hiromitsu Kigawa

Yoshiko Yokobori

Isao Shimotsuura

Hironobu c/o Ricoh Software Inc Murai

A liquid discharge apparatus includes a color component divided data generation unit, a dot data generation processing unit, and a dot data segmentation processing unit. The color component divided data generation unit generates color component divided data from image data. The dot data generation processing unit applies a dot data generation mask to the color component divided data to generate dot data. The dot data segmentation processing unit applies a segmentation mask to the dot data to generate scan data. A width of the segmentation mask in a main scanning direction is different from a width of the dot data generation mask in the main scanning direction.

Liquid discharge apparatus and liquid discharge method

A liquid discharging device discharges a liquid onto a recording medium for image formation, and includes head modules each including a nozzle array that discharges a liquid of at least one color, the head modules being connected in a direction of the nozzle array from one of the head modules, the one supported by a guide extending in a main-scanning direction; and processing circuitry functioning as an acquirer that acquires image data based on which the image is formed, and an allocator that allocates, to dots of the image data, a row of liquid droplets discharged from one of the head modules closest to the guide in a sub-scanning direction, such that the liquid droplets discharged from the head module closest to the guide are equal to or higher in ratio than the liquid droplets discharged from each head module other than the head module closest to the guide.

Liquid discharging device, liquid discharging method, and computer program product

A liquid discharging device includes: a recording head that has nozzles discharging liquid, and forms an image on a target surface with the liquid while performing scanning of the target surface for multiple times; a moving unit that moves the recording head in main-scanning direction while making the head discharge liquid, and moves the head in sub-scanning direction after the head has discharged liquid; a drive waveform applying unit that applies a drive waveform to the respective nozzles; a temperature detecting unit that detects temperature about the head; a correcting unit that corrects drive waveform based on detected temperature; and a control unit that, when temperature about the head changes from first temperature to second temperature, performs control in such a way that, during the multiple scans, use of second-type drive waveform corresponding to the second temperature gradually increases against use of first-type drive waveform corresponding to the first temperature.

Liquid discharging device and drive waveform control method

A calculating unit calculates, as a reference number N of scans, a sum by adding 1 to a product M of the number m of scans in a main-scanning direction and the number n of scans in a sub-scanning direction. An assigning unit assigns, as a count of scans indicating a scan order, an integer 1 or more and the product M or more to each pixel of a unit image. A changing unit changes the count of scans of some pixels to which a first scan is assigned to an N-th scan. The generating unit generates print data, in which nozzle groups from a nozzle group arranged on a downstream end in the sub-scanning direction to a nozzle group arranged on an upstream end are sequentially assigned to pixels from the pixels to which the first scan is assigned to the pixels to which the N-th scan is assigned.

Information processing apparatus, information processing method, computer program product, and image forming apparatus

An image processing apparatus includes an acquiring unit, an identifying unit, and a correcting unit. The acquiring unit acquires input data including shape data on a concave-convex area having a convex part and a concave part and image data of an image formed on the concave-convex area. The identifying unit identifies an uneven area which is within a bottom surface of the concave part and is continuous with a wall surface connecting the bottom surface and a convex surface of the convex part. The correcting unit corrects the image data so that the brightness of a first image area in the uneven area stacked with multiple dots and the brightness of a second image area continuous with the first image area become about the same.

Image processing apparatus, non-transitory computer-readable medium, and image processing 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 method including the steps of obtaining an original image, generating a converted image by converting a gradation of a pixel of the original image into a prescribed gradations for an image forming apparatus to express, outputting a dot pattern image through a nozzle based on a predetermined dot pattern signal, generating nozzle characteristic information of the nozzle based on the dot pattern image, generating simulation information based on the converted image and the nozzle characteristic information, generating converted simulation information by converting the simulation information to the same gradation as that of the pixel of the original image, comparing the converted simulation information with the original image, and calculating an error between the original image and the converted simulation information.

Image processing method, image processing program, and information processing apparatus

An image processing system that facilitates process of color universal design that enables people with color amblyopia to recognize color difference as image pattern without changing characteristic of coloration and gradation and people with no disabilities who look the same image to feel less discomfort. A hue determining unitdetermines hue of image data, and a selecting unitselects halftone processing in accordance with the determined hue. If the selected halftone processing is dithering process that uses AM dithering, a halftone processing unitexecutes halftone processing with different line per inch depending on the determined hue.

Image processing system, method, program, and storage medium to implement universal color design

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 forming apparatus includes recording heads for ejecting recording liquids of colors onto a recording medium. The apparatus includes a reference-patch forming unit that records a reference patch, the reference patch being formed by overlaying dot array patterns recorded with the recording liquids of different colors, the dot array patterns having no correlation therebetween; a detection-patch-group forming unit that records a detection patch group including detection patches, each of the detection patches being formed by overlaying dot array patterns recorded with the recording liquids of the different colors, the dot array patterns having a same cycle of regular dot array, the detection patches being allocated with different misregistration amounts of the dot array patterns; and a color-misregistration correcting unit that corrects color misregistration based on results of comparison between color tone of the reference patch and color tone of each of the detection patches.

Image forming apparatus, color-misregistration correcting method, and computer program product

A disclosed image processing apparatus includes an adjusting unit configured to convert input image data into image formation data, an arithmetic unit configured to calculate an image formation ink cost based on the converted image formation data, and a determining unit configured to compare the calculated image formation ink cost with a black-and-white image formation ink cost, wherein the calculated image formation ink cost is fixed based on a determination result of the first determining unit.

Image processing apparatus, image processing method, and recording medium

An image processing apparatus includes: a first colorant reducing unit that performs a first colorant reducing process that reduces colorant of black on second image data to output fourth image data representing tone values of the black separation on a per-pixel basis; a second colorant reducing unit that performs a second colorant reducing process that reduces the colorants of the colors other than black on a portion of third image data, the portion corresponding to the separations of the colors other than black, to output fifth image data representing tone values of each of the separations of the colors other than black on a per-pixel basis; and a combining unit that combines the fourth image data and the fifth image data to output sixth image data representing tone values of each of the separations of the colors including black on a per-pixel basis.

Image processing apparatus, image processing method, and non-transitory computer-readable medium

An image processing apparatus includes: a color information acquiring unit that acquires color information of each scanning line of each head in a main scanning direction; and a correction unit that corrects a parameter used for a halftone process of a scanning line in the main scanning direction and a parameter used for a halftone process of an adjacent line adjacent to the scanning line, and, based on the acquired color information, corrects a difference in colors of the scanning line and the adjacent line.

Image processing apparatus, image forming apparatus, and image processing method

An image processing method includes converting multilevel data of an image into a dot pattern using a multilevel error diffusion process. The conversion includes determining a pixel corresponding to an abnormal nozzle based on abnormal nozzle information provided for each of droplet sizes supported by nozzles of an image forming apparatus; preventing jetting of a droplet onto the determined pixel; distributing a quantization error of the determined pixel calculated in the multilevel error diffusion process to neighboring pixels; and if extra-large droplets with a droplet size greater than the droplet size of a full-size droplet capable of filling a pixel are to be formed in the neighboring pixels as a result of distributing the quantization error, removing one or more of the extra-large droplets or reducing the droplet size of one or more of the extra-large droplets.

Image processing method, image processing apparatus, image forming apparatus, image forming system, and storage medium

An image forming apparatus enables the output of a high-quality image even when an expendable supply, such as ink, recording head, or recording sheet other than a specific expendable supply, such as one designated by a manufacturer, is used. The image forming apparatus includes a carriage for moving a recording head having plural recording nozzles in a horizontal scan direction. The recording head discharges ink onto a recording medium. A detection unit detects whether one or more expendable supplies required for image formation is a specific expendable supply. Upon detection of a non-specific expendable supply, a notifying unit notifies an operator and suggests that the image forming method be changed.

Image forming apparatus

Growing community of inventors

Kanagawa, Japan

Masanori Hirano