Pfu Limited

Satoshi Miyamoto

Masanari Takabatake

Jiyun Du

Yutaka Nakashima

Akihiko Inamoto

Seiichi Takeda

Shigeharu Okano

Motoharu Ichida

Satoshi Sakai

Hironaga Hongawa

Satoru Moto

Hitoshi Terashima

Shigeki Uesugi

Tadashi Nishikawa

Masanobu Hongo

Nobuhisa Yamazaki

Hideaki Shibata

Tatsuo Nozaki

Yasuhiko Kishimoto

Norihiro Yamasaku

Isao Nagata

Eri Yamanishi

Yoshiro Kawamoto

Tadasuke Yoshida

Yoshiaki Fujimoto

Shintaro Shitahira

Satoshii Moriguchi

Naoaki Shima

Yoshiaki Kawamoto

An image processing apparatus including an image photographing unit, and a control unit, wherein the control unit includes a document image acquiring unit that acquires a document image including at least an image of a document, a contour extracting unit that extracts a contour of the document from the document image, the extracting the contour being performed based on luminance, a distortion position detecting unit that detects a contour straight line located at a location where a distance between the contour and a center point of a rectangle having the minimum area surrounding the contour is shortest, the contour straight line being detected as a distortion position in the document, the contour straight line being located on the contour, and a corrected image generating unit that performs a geometric correction on the document image to extend the contour to a correction reference line determined from the distortion position, and generates a corrected image having the distortion in the document image corrected.

Image processing apparatus and image processing method for correcting distortion in photographed image

A notebook information processor includes a lid including an image photographing unit and a display, and a main body, wherein the control unit includes a live view displaying unit that displays a live view obtained by photographing at least a portion of the main body within a photographing area of the image photographing unit on the display, a rectangle detecting unit that detects a rectangle for calculating a projective transformation parameter from the live view, a projective transformation parameter calculating unit that calculates the projective transformation parameter from a coordinate of the rectangle, and a still image obtaining unit that performs a projective transformation on the live view so as to obtain a live view photographed from a front direction, using the projective transformation parameter, obtains a still image from the live view after the projective transformation, and stores the still image in the storage unit.

Notebook information processor and projective transformation parameter calculating method

A notebook information processor includes an image photographing unit, a display, a keyboard, a storage unit, and a control unit, wherein the control unit includes, a live view displaying unit that displays a live view obtained by photographing at least a portion of the keyboard within a photographing area of the image photographing unit on the display, a still image obtaining unit that obtains a still image from the live view displayed on the display by the live view displaying unit, when receiving a photographing start signal to start photographing the still image of a document put on the keyboard, and an image processing unit that performs projective transformation on the still image obtained by the still image obtaining unit so as to obtain an image photographed from a front direction, executes image processing so as to perform cropping to clip the document, and stores a transformed image of the document after the image processing in the storage unit.

Notebook information processor and image reading method

Document image data is converted into luminance image data. Block image data is generated from the luminance image data. Start point block pixel data and end point block pixel data are set based on a change rate of luminance values of adjacent block pixel data. A luminance value of block pixel data between the start point block pixel data and the end point block pixel data is corrected based on a start point luminance value and an end point luminance value. The luminance value, of the block pixel data wherein each luminance value of an adjacent block pixel data cluster is less than an average value, is substituted by the average value. The luminance value of each pixel data is set based on the luminance value of the block pixel data. Post process luminance image data that includes each pixel data is reconverted into the document image data.

Image processor and image processing method using luminance value rate change

An original is inclined with respect to an optical axis of a camera until the camera is positioned outside a reflected-image taking range by inclining a mounting surface of an original glass on which the original is placed. This makes it possible, when the original is taken by the camera, to prevent the camera from being reflected on the original and being taken in with the original. An imaging case formed of a diffusing member that is made of a high light-diffusing material or a high light-absorbing material is arranged in the reflected-image taking range. This makes it possible to prevent an object positioned in the reflected-image taking range from being reflected on the original and being taken by the camera. Consequently, clear image information can be more reliably obtained.

Image reading apparatus

A solid-concentration measuring apparatus includes an ultrasonic transmitter, an ultrasonic receiver, and a response-time integrator. The ultrasonic transmitter transmits a single-pulse ultrasonic wave to a liquid toner. The ultrasonic receiver receives the single-pulse ultrasonic wave. The ultrasonic transmitter transmits again a single-pulse ultrasonic wave after a predetermined time has passed from when the ultrasonic receiver receives the single-pulse ultrasonic wave. The response-time integrator measures a response time from transmission to reception of each single-pulse ultrasonic wave, and integrates the response time with respect to each set of N pulses (N&#x3e;1). A solid concentration of the liquid toner is calculated based on the integrated response time.

Solid-concentration measuring apparatus and method thereof, and solid-concentration control system

In the present invention, a toner image produced through a development process of supplying a liquid toner onto an image bearing body bearing an electrostatic latent image is transferred from the image bearing body onto an intermediate transfer body and then transferred from the intermediate transfer body onto a printing medium by use of a backup roller in a transfer-and-fixation zone. The printing medium is preheated to a temperature required for transfer and fixation before the printing medium reaches the transfer-and-fixation zone. No heating means is provided in the transfer-and-fixation zone, and the intermediate transfer body and the backup roller are pressed against each other at a high pressure ranging from 10 kg/cm to 60 kg/cm . Alternatively, the intermediate transfer body is provided with heating means; resin for use in the liquid toner has a softening temperature not higher than withstand temperatures of members other than the intermediate transfer body such as a photosensitive drum; and the intermediate transfer body is heated to a temperature not lower than the softening temperature of the resin and not higher than the withstand temperatures of the other members.

Transfer-and-fixation system with preheated printing medium for creating images using liquid-development electrophotographic apparatus

A liquid-development electrophotographic apparatus utilizes a nonvolatile, high-viscosity, high-concentration liquid toner as a liquid developer. A developing section is in contact with photosensitive drums , on which an electrostatic latent image is formed, so that the liquid developer is supplied onto photosensitive drums - . Toner particles contained in the liquid developer adhere to the photosensitive drums - according to an electric field established between the developing section and the photosensitive drums - to form toner images. The toner images are transferred from the photosensitive drums - to an intermediate transfer section. A transfer-and-fixation section includes a heater to melt-transfer the toner images onto the printing medium. A development section is disposed at a lower portion of the apparatus to prevent smudging of the printing medium and the intermediate transfer section even when the liquid toner spills.

Liquid-development electrophotographic apparatus

The present invention provides a toner recycling control system which stably feeds a liquid developer of an appropriate concentration to a liquid developing apparatus employing a high-viscosity liquid developer; appropriately adjusts the concentration of residual developer collected after development and after transfer; and feeds the adjusted developer to the developing apparatus. The toner recycling control system collects a post-development residual developer from a developer-bearing body and a post-transfer residual developer from an image-bearing body; performs developer concentration adjustment to yield an adjusted developer; and feeds the adjusted developer back to the developer-bearing body. Thus, the toner recycling control system includes a concentration adjustment tank which stores the collected developer and is replenished with a concentrated developer and carrier liquid for developer concentration adjustment; and a buffer tank which receives and stores a liquid developer which has undergone concentration adjustment in the concentration adjustment tank. Once adjusted to an appropriate concentration, the liquid developer is fed to the developer-bearing body from the buffer tank.

Toner recycle control system of electrophotographing device using viscous liquid developing solution

A liquid-development full-color electrophotographic apparatus utilizes a development section having a liquid toner as a liquid developer to form a toner image according to an electric field established between the development section and a photosensitive drum. The toner image is transferred from the photosensitive drum onto an intermediate transfer roller according to an electric field established between the intermediate transfer roller and the photosensitive drum, from the intermediate transfer roller to an intermediate transfer belt, and then to a transfer-and-fixation section, which melt-transfers the toner image onto a printing medium. A voltage controlled according to electric characteristics of each color toner is applied to the corresponding photosensitive drums while the roller is grounded. A toner cohesion enhancement unit is provided for enhancing the degree of toner cohesion of a toner image transferred and reverse transfer is suppressed.

Liquid-development full-color electrophotographic device

Provided are an applicator roller for conveying and applying liquid toner onto a developing roller in the form of a level, thin layer, and a conductive blade which comes into contact with a liquid toner layer on the developing roller. A predetermined amount of liquid toner passes through a gap between the conductive blade and the developer roller; and voltage is applied to the conductive blade so as to establish a state such that toner particles contained in the liquid toner are sparsely scattered in a surface region of a level, thin toner layer on the developing roller. Subsequently, the liquid toner, whose surface region is in a state such that toner particles are sparsely scattered, is brought into contact with an image bearer body for performing development.

Liquid developing electrophotographic device

A toner image is transferred from a photosensitive member onto an intermediate transfer belt . Toner particles transferred onto the intermediate transfer belt are melted through application of heat, and the molten toner is transferred onto a printing medium. A carrier-removing roller is disposed downstream of a position where a toner layer on the intermediate transfer belt is melted through application of heat. Through utilization of a phenomenon that toner particles (resin component) are melted and integrated in a heating process and a phenomenon that the carrier solvent (liquid component) is isolated in the heating process, the carrier solvent is removed efficiently. Also, there is disposed at the position of the heating process a carrier-removing roller for removing the carrier solvent from the intermediate transfer belt while the toner layer on the intermediate transfer belt is being melted through application of heat.

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Ishikawa, Japan

Satoshi Miyamoto