Konica Corporation

Konishiroku Photo Industry Co., Ltd.

Yoshiyuki Ichihara

Satoshi Haneda

Kouichi Sawada

Hiroyuki Yamamoto

Takashi Murahashi

Masakazu Fukuchi

Masahiko Matsunawa

Takashi Hasebe

Jun Nakagawa

Koji Washio

Tetsuya Niitsuma

Toshihiko Nakazawa

Toshihiro Takesue

Noboru Koizumi

Makoto Kon

Motokazu Ikeda

Kiyoshi Harada

Shizuo Morita

Hisashi Shoji

Toshihiro Motoi

Kunihisa Yoshino

Kunio Ito

Hiroyuki Futami

Kazuo Yasuda

Shizuo Kayano

Takashi Kamada

Hideki Morita

Tadashi Izawa

Sizuo Morita

Kouichi Takagi

Norihiro Wakui

Shisuo Morita

Yuuichi Goto

An image reading apparatus, comprises an image reader to read images of a document; a rotation processor to conduct a rotation processing for image data obtained through reading by the image reader in accordance with inclination of the document; a memory in which image data subjected to rotation processing by the rotation processor are stored; and an external inputting device to input arbitrary rotation angles. When the rotation angles are inputted from the external inputting device, the image data obtained through reading by the image reader are subjected to the rotation processing in accordance with the inputted rotation angle and are stored in the memory.

Image reading apparatus and image forming apparatus

A correction method of a document inclination angle includes the steps of: first detecting an edge of a document; second detecting an inclination amount of the document corresponding to an inclination angle according to a detected result of the edge of the document. The inclination angle represents an inclination angle of the edge of the document with respect to a first reference direction and a second reference direction perpendicular to the first reference direction. The correction method further includes correcting the inclination angle of image data of the document with respect to the first and second reference directions. The step of the correcting includes a shift processing conducting a first shift processing in which the image data are shifted to one of the first and second reference directions according to the inclination amount and conducting a second shift processing in which the image data are shifted to the other of the first and second reference directions according to the inclination amount.

Correction method of document inclination angle

An image processing apparatus includes a photoelectric conversion circuit for reading an original image by photoelectric-converting and for outputting an image signal, wherein the photoelectric conversion circuit is a dual channel register type separately outputting the image signal for odd numbered pixels and even numbered pixels; an analog-to-digital conversion circuit for converting the image signal to the image data which includes odd numbered pixel data for the odd numbered pixel and even numbered pixel data for the even numbered pixel; an image separation circuit for generating an odd numbered line data and an even numbered line data from the odd numbered pixel data and the even numbered pixel data, wherein the image separation circuit includes four line memories, and the odd numbered pixel data and the even numbered pixel data are synthesized to the odd numbered line data and an even numbered line data after the odd numbered pixel data and the even numbered pixel data are stored to each of the four line memories; and an outputting device for outputting an image based on the set of the odd numbered line data and the even line data.

Image forming apparatus

An image forming machine such as a copying machine and a printer for forming an image on a recording medium with plural laser beams. The image forming machine includes an image reader for reading an original image and for simultaneously generating image signals corresponding to the original image; plural laser beam generators for writing the image on the recording medium according to the image signals; an index signal generating circuit for generating plural index signals each of which initiates a respective one of the plural laser beam generators to write the image; and a control circuit for controlling a reading operation of the image reader. In the image forming machine, the control circuit initiates the reading operation of the image reader according to one of the plural index signals.

Image forming apparatus for forming an image in use with a plurality of

In an image forming apparatus for simultaneously recording plural image lines on a recording medium by scannintg simultaneously with plural light beams along parallel scanning lines in a primary scanning direction, before a deviation detector detects a deviation among the plural light beams in the primary scanning direction, a beam power controller adjusts the electric power for each light beam generator so that the beam diameter of each light beam is made equal to each other.

Synchronization signal generating unit of an image forming apparatus

In an image forming machine, density data of small pixels in an objective pixel determined according to density of pixels adjoining the objective pixels, the objective pixel determines a recording position for each color based on density distribution of the adjoining pixels when the recording position of each color is modulated in the primary scanning direction and secondary scanning direction based on density distribution of both the objective pixel and the adjoining pixels. Further, there are provided an image discriminator for image judgment on the objective pixel and a modulator for modulating a recording position using a reference wave with a long cycle when an image is judged to be a halftone image area under a reference wave with a short cycle when an image is judged to be a character image area.

Image forming apparatus that modulates image density data

In a method of forming an image in a form of pixels, the density distribution around a target pixel is obtained by processing image signals of pixels neighboring the target pixel. The target pixel is sub-divided into a plurality of sub-pixels which form of matrix of n rows.times.m columns. The sub density distribution of the sub-pixels in the target pixel is assumed from the density distribution of the neighboring pixels. The density of each of sub-pixels is determined by multiplying the density of the target pixel, by a constant P and a density ratio of the corresponding sub-pixels in the sub density distribution.

Digital image forming apparatus using subdivided pixels

In a color toner image forming apparatus equipped with a scanning device to scan a photoreceptor with a light beam which is modulated on the basis of image density represented by image signals so that a latent image is formed on the photoreceptor; there is provided a control device to control the color toner image forming apparatus so that plural color toner images are superimposed on the photorecetor. The control device includes a start position control circuit to control a scanning start position of the scanning device so that the scanning start position is shifted for each of the plural color component images.

Image forming apparatus to provide multicolor images

An apparatus for forming an image with modulated image lights which are obtained by modulating an image light in accordance with image signals, including a reference pattern signal generation circuit, a comparator to compare image signals with a reference pattern signal so as to produce a pulse width modulation signal, and a circuit to shift the level of the image signal of either a maximum or minimum value to a level out of the amplitude of the reference pattern signal.

A color scanner having two lines of CCD. One of the CCD line is used for scanning green image of a document, and another CCD line is used for scanning red and blue images of the document. In the CCD line for red and blue image scanning, red and blue filters are located alternatively on the pixel sensors in a lined shape. In order to obtain a pixel density corresponding to the red image and blue image as same as that to the green image, each of red and blue image signals is processed from two image signals. The color scanner is provided with a memory to store red and blue image signals so that those signals are processed with next-obtained red and blue image signals. The color scanner also includes a shift register to delay green image signals so that all of red, blue, and green image signals are carried out to a processor simultaneously.

Color image reading apparatus

A document size detector for detecting a size of a document in use with a document scanner. The document size detector has an irradiator to irradiate the document with a light beam; a cover of the document; a receiver of the reflection light from the document and the cover; a converter to convert the reflection light to image signals; a detector to detect the shadow of the document on the cover in the image signals; and the determiner to determine the size of the document according to the detected shadow of the document.

Document size detection apparatus

A color image forming apparatus including a color image reader for optically scanning a document to produce blue, green, and red color separated information, a processor for processing the color separating information supplied by the reader and generating black, yellow, magenta, and cyan color information signals, a rotatable image retainer, and two latent image forming devices for forming latent images at a common region on the image retainer in accordance with the color information signals corresponding to two recording colors. The first latent image is formed by one of the latent image forming devices in synchronization with the scanning of the color image recorder to form a first latent image at a first writing position. The second latent image forming device is delayed to form the second latent image at a second writing position. The delay device compensates for the time necessary for the common region on the image retainer to travel between the first and second writing positions. The apparatus further includes a number of developers, each developer being used to develop one of the latent images, thereby forming a multicolor image composed of multiple toner images on the image retainer. Two color latent images, corresponding to two of the color information signals, are formed on the image retainer and developed by the developing means during the first rotation of the image retainer corresponding to a first optical scanning of the document, and the remaining two color latent images, corresponding to the remaining two color information signals are formed on the image retainer and developed by the developing devices during a second rotation of the image retainer corresponding to a second scanning of the document. All the toner images are then simultaneously transferred to the transfer sheet.

Color image forming apparatus

The invention provides an improved color image reader in which the document having a color original image is irradiated by a light source moving relatively on such document and the reflected light is introduced into a single unit including a lens and a color separator so that the color original image is separated into plural color component images. The plural color component images are respectively read and photo-electrically converted into plural signals by CCD's. In such arrangement, the light source is positioned at the upper side of the optical axis of the lens and the CCD's are disposed at the lower side of the axis. The color separator can form the plural color component images on the same plane.

Color image reader having a lens and prism incorporated into a single

An image reading device for reading an image by a solid-state image reading elements (CCDs) being disposed at the image forming point of an optical unit which is integrated with at least an image forming lens, dichroic mirror for separating the color image into plural color components and unit construction parts such as a base, fixing plates, and lens barrel. The image reading elements are fixed to a lens holding member with an attaching plate by using adhesive. The attaching plate has a position adjusting mechanism.

Solid state image reading device with sensors adhered to plate which is

An object of the invention is to provide a color image reading device having a lens unit for introducing an color image, an optical prism for separating the color image into a plurality of optical image components, and a plurality of CCDs for converting the optical image components into image signals in which the CCDs are attached to projection surfaces of the optical prism by using adhesive materials.

Growing community of inventors

Hachioji, Japan

Yoshiyuki Ichihara