Fuji Xerox Co., Ltd.

Michio Kikuchi

Kiyofumi Aikawa

Takashi Hiramatsu

Kazuya Fukunaga

Hideki Moriya

Masaki Hachisuga

Yoshiya Imoto

Yasuyuki Tanaka

Masahiko Kubo

Hitoshi Ogatsu

Hiroyuki Kawano

Shinsuke Sugi

Yoshifumi Takebe

Hirokazu Ichikawa

Seigo Makida

Takao Furuya

Natsumi Miyazawa

Hidekazu Imai

An image is read from a recording medium via first and second optical imaging systems disposed such that respective reading regions partially overlap each other in a principal scanning direction on a reading surface. A sum of distances over which first and second images captured by the first and second optical imaging systems, respectively, are displaced in the principal scanning direction with respect to a reference point included in a region in which the reading regions overlap each other is calculated. First and second distances, over which the first and second images are displaced in the principal scanning direction, respectively, are calculated using the sum and first and second reading angles at which the first and second optical imaging systems, respectively, read the reference point. Positions of the first image and the second image in the principal scanning direction are corrected using the first distance and the second distance, respectively.

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

Provided is an image reading device including an irradiation section that irradiates a reading position with light, a color chart that includes plural color patches, and that is provided on a curved surface of a rotatable roller, an image capturing section that captures an image of the color chart at the reading position, and that outputs image signals which express the captured image, a correction section that corrects the image signals using a correction coefficient corresponding to the curved surface, and a calibration section that performs calibration using the image signals, which are corrected by the correction section, and representative color values of the plural color patches, the representative color values being stored in advance.

Image reading device and image forming apparatus performing image correction using color patches on a curved surface

Provided is a transport device including plural rollers that are provided on a transporting path on which a sheet is transported in a transport direction and is subjected to a process at a process position, and transport the sheet which comes into contact with surfaces of the rollers in the transport direction by rotation of the rollers, among the plural rollers, first rollers that are provided closest to the process position, among the plural rollers, second rollers that are provided closest to the first rollers on an opposite side with respect to the process position, and a driving unit that drives the first rollers and the second rollers to rotate so that a speed of a surface of the first roller is faster than a speed of a surface of the second roller at least while the sheet passes through the process position.

Transport device and transport system

Provided is an image reading apparatus including a guide plate that is movable between a first position and a second position and guides a medium at one side thereof when disposed at the first position, a retention member that is rotatable about an axis intersecting a direction in which the medium is guided, that has a first side surface and a second side surface which has a curvature greater than a curvature of the first side surface, and that retains plural color samples on the second side surface, a reading unit that reads, at a reading position, an image formed on the medium guided by the guide plate, and a rotating unit that causes the retention member to rotate such that the other side of the guide plate and the first side surface face each other and the plural color samples are moved to the reading position.

Image reading apparatus

Provided is an image reading apparatus, including a reading portion which reads an image and generates gradation values of each pixel, a calculation portion which calculates a coefficient group that allows the gradation values of each pixel generated as the reading portion reads a reference image, to be close to the gradation values of the pixels which correspond to image data forming the reference image, divides plural regions including an overlapped part in which the reference images are overlapped with each other, and calculates the coefficient group in each region, and a correction portion which corrects the gradation values of each pixel generated as the reading portion reads a correction target image, and corrects the gradation values of the correction target which correspond to the gradation values of the pixels of the overlapped part using the coefficient group.

Image reading apparatus and medium

Provided is an image reading apparatus including an imaging unit that images light incident from a medium on which an image is formed, a measurement unit that measures a color value on an image, based on image data obtained by the imaging unit, in correspondence with a position on the image, a generation unit that generates error information indicating an error included in the color value according to the color value measured by the measurement unit and a relative position of the position on the image with respect to an optical axis of the imaging unit, and an output unit that outputs the error information generated by the generation unit and the measured color value.

Image reading apparatus, and image reading method

A recording material processing device, includes: an accumulation unit that is accumulated with a plurality of recording materials each of which is a recording material formed with an image by an image forming unit and inspected by an inspection unit, where the image forming unit that forms the image on the recording material based on original image data; and a processing unit that removes the recording material which was determined to have a defect which occurred in the image by the inspecting unit, among the plurality of recording materials and adds a new recording material on which a same image is formed by the image forming unit, to the plurality of recording materials, the same image being based on the original image data of the image formed on the defective recording material.

Image inspecting system and recording material processing device

There is provided an image inspection system. An image reading unit reads a formed image which is formed on a recording medium based on original image data to generate read image data. A determination unit compares the read image data and the original image data to determine whether or not the formed image includes a defective region. An extraction unit extracts an image of characters present around the defective region from the read image data. An image display device displays the image of the characters and an image of the defective region such that both the images overlap with each other.

Image inspection system and image inspection method

An image evaluation apparatus includes a reading unit that includes a monochrome detection unit reading, in a focused state, an image formed on a recording material by an image forming apparatus that represents grayscale of the image by forming dots on the recording material, and a color detection unit reading the image in a defocused state; an image information obtaining unit that obtains image information for the image forming apparatus to form the image; a computing unit that computes a luminance and a chroma of an image supposed to be formed on the recording material by the image forming apparatus from the obtained image information; a comparing unit that compares a derived luminance with the computed luminance, and compares a derived chroma with the computed chroma; and an image evaluation unit that evaluates the image formed by the image forming apparatus, on the basis of results of comparison.

Image evaluation apparatus and method, image forming system, and non-transitory computer readable medium

When defects occur in four places of a print data region of a paper Pas illustrated in FIG.A, four code images are formed on an interleaving paper Pas illustrated in FIG.B, more specifically, four code images are formed on the interleaving paper Psuch that the positions of plural defect occurrence portions in the paper Pare aligned with the positions of plural code images formed in the interleaving paper P, respectively, and the sizes of the code images are made to be different depending on the defective degree of the defects occurring at the defect occurrence portions of the paper P, specifically, the larger the defective degree is, the larger the code image is.

Image inspection system and image inspection apparatus

An image processing apparatus includes: a controller that causes an image forming unit to form an image so that a plurality of unit images are arranged in a first direction with a constant distance between adjacent unit images; an acquisition unit that acquires read image data indicating a position and a grey level value of each pixel constituting the image formed under control of the controller; and a calculation unit that calculates a misregistration with respect to the first direction of the image formed by the image forming unit, based on a convolution operation performed on the read image data acquired by the acquisition unit, the convolution operation using a reference periodic function whose variable is a position in the first direction.

Image processing apparatus and image forming apparatus configured to calculate a misregistration amount

An image forming apparatus includes a raster image data generating unit, a halftone image data generating unit, a size control unit, an image forming unit and a flash fixing unit. The raster image data generating unit generates raster image data of a plurality of color components from document data. The halftone image data generating unit generates halftone image data from the raster image data. The size control unit controls minimum halftone dot sizes of the halftone image data. The image forming unit forms color toner images to be fixed on a recording medium using color toners corresponding to the plurality of color components, based on the halftone image data whose minimum halftone dot sizes are controlled by the size control unit. The flash fixing unit emits flash light from a flash light source to the recording medium to fix the color toner images transferred onto the recording medium.

Image forming apparatus and method of controlling minimum halftone dot size

An image processing apparatus includes: a composite unit that generates a composite parameter used for implementing a time varying variation correction processing for suppressing color variations associated with lapse of time and a spatial variation correction processing for suppressing color variations in accordance with a position in an image, on the basis of a time varying correction parameter used for the time varying variation correction processing and a spatial correction parameter used for the spatial variation correction processing; and an image correction unit that subjects input image data to the time varying variation correction processing and the spatial variation correction processing through use of the composite parameter generated by the composite unit.

Image processing apparatus, table generation apparatus, and image forming system

An image reading apparatus includes a light source with a first luminescent portion that outputs light with a first wavelength range and a second luminescent portion that outputs light with a second wavelength range, the wavelength ranges being different from each other; a light-receiving portion that receives light reflected from an original irradiated by the light source; a scanning portion that shifts a reading position of the original in a vertical scanning direction by changing a relative position between the original and the light-receiving portion; a switching portion that alternately turns on the first and second luminescent portions when the scanning portion shifts the reading position, wherein a vertical scanning resolution for a first data obtained when the first luminescent portion is turned on is independently set from a vertical scanning resolution for a second data obtained when the second luminescent portion is turned on.

Image reading apparatus capable of reading infrared and visible images

An image forming apparatus includes: an image processing section for performing tone correction of an image signal; and an image output section for outputting an image in accordance with an image recording signal output, wherein the image processing section includes: a tone correction processing unit which, in accordance with an input image signal, outputs the image signal having undergone tone correction; a density calculation unit for calculating a density value at a given position in a scanning direction of a test pattern image in accordance with an image signal pertaining to the input test pattern image; and a discrimination unit for discriminating whether or not density inconsistencies having arisen at the given position in the scanning direction can be corrected by the tone correction processing unit, on the basis of the density value calculated by the density calculation unit and a predetermined threshold value.

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Kanagawa, Japan

Michio Kikuchi