Canon Kabushiki Kaisha

Masafumi Kamei

Noriyoshi Chizawa

Yoshiyuki Suzuki

Yoshinori Abe

Hiroyuki Ichikawa

Yoshihiko Suzuki

Satoru Kutsuwada

Tetsuro Fukusaka

Hiroyuki Yamaguchi

Katsuhiro Ishido

Takashi Sugiura

Kazunori Togashi

Takashi Soya

Shizuo Hasegawa

Kazuhito Ohashi

Yuichi Makino

Hideho Inagawa

Shinichiro Wakahara

Yoshihiro Funamizu

Tsunao Hombo

Daishiro Sekijima

Akio Itoh

Jiro Futagawa

Akinobu Nishikata

Masanori Sakai

Shokyo Koh

Akio Ito

Tsutomu Takayama

Hideto Kohtani

Hirohiko Tashiro

Hiroaki Takeda

Hisatsugu Tahara

Masao Watanabe

Isamu Sato

Tomobumi Nakayama

Tomoichirou Ohta

Shohei Takeda

Seiichirou Satomura

Shouhei Takeda

Shin'ichi Nishimura

Shin′ichi Nishimura

When an original conveying unit that rotates about a rotation centerreaches an opening angle, an image is read using a line sensor, and a detected object is determined as being white dust on a platen glass. When it further reaches an opening angle, an image is again read using the line sensor, and a detected object is determined as being black dust on the platen glass. When it further reaches an opening angle, an image is again read using the line sensor, and a detected object is determined as being dust on a reference white plate with which the original conveying unit is provided in a state of facing a reading position where the line sensor performs reading.

Image reading apparatus

An image reading apparatus reads an image from a document being simultaneously fed by the apparatus. A document feeder unit feeds the document on a original plate. A first image reading unit reads an image from the fed document at a first document-read position on the original plate. A second image reading unit reads an image from the fed document at a second document-read position located at a predetermined distance from the first document-read position in a document feeding direction. An abnormal pixel detection unit detects abnormal pixels resulting from rubbish moved between the first document-read position and second document-read position on the original plate together with the document.

Image reading apparatus and method for controlling the same

There is provided an image reading apparatus for acquiring a read signal of an image by receiving and photoelectrically converting a light reflected from a document. The location of an alien substance on an original plate is detected based on a reflected light received by a light receiving unit adapted to receive a light reflected from a document. When an alien substance is detected, an illumination unit selectively illuminates the location in which the alien substance has been detected. Also, a message which prompts cleaning of the alien substance is displayed. A method of displaying the alien substance location are also provided. Thereby, the image reading apparatus of the present invention can assists a user in cleaning the alien substance such as a dust or dirt on the original plate.

Image reading apparatus and method of displaying alien substance location thereof

A digital electronic apparatus includes a plurality of units and a cable. The plurality of units have metallic housings and are combined such that surfaces of the metallic housings are opposed to each other. The cable is laid on a surface of the metallic housing of at least one of the units. The surface on which the cable is laid is other than the surfaces of the metallic housings that are opposed to each other.

Digital electronic apparatus with suppressed radiant noise

Video data (default data in case of a black original) output from a CCD line sensor upon reading an image while a light source is kept OFF corresponds to beat noise contained in video data obtained upon reading an image while the light source is ON. After the beat noise data is stored, the correction data stored in a correction data storage unit is subtracted from video data read by a normal technique while the light source is ON in a correction memory, thus executing correction for removing beat noise. After the beat noise is removed in this way, when an image is formed under the control of a printer control unit, an image free from any beat noise can be obtained as an output image.

Clock control device used in image formation

This invention provides an image reading method and apparatus which can prevent a large difference from being produced between the color tones of the read image and the original image. A plurality of signals output from an image sensor (,) are A/D-converted into a plurality of digital signals by A/D conversion circuits (,), a predetermined one of the A/D-converted digital signals is compared with a predetermined reference level by a comparator (,), a low-pass filter (,) removes any high-frequency component from the comparison result, and the output from the low-pass filter (,) is controlled to be input to the A/D conversion circuits (,) as a reference voltage for determining the input range of each A/D conversion circuit (,).

Image reading apparatus for reducing color differences

A linear image sensor includes N arrays of photoelectric converting pixels, wherein N is an even integer at least equal to 2. Each array is formed by arranging, with a predetermined pixel pitch in a first direction of the array, a plurality of pixels, and each of the pixels is so shaped that the area per unit length of the pixel decreases progressively from the center of the pixel both in the first direction of the array and in a second direction perpendicular to the first direction. The N arrays themselves are provided with a mutual distance from each other of M/2 times the pixel pitch in the second direction and are mutually displaced by 1/N of the pixel pitch in the first direction so as to form a mutually interpolating arrangement, wherein M is a positive integer equal to at least 1 and wherein M and N are independent of each other.

Linear image sensor

An image forming apparatus comprises an image memory unit for storing image information, an image rotation unit for applying predetermined rotation to the image information read from the image memory unit, an image forming unit for forming an image on an output medium based on the image information derived directly from the image memory unit or by the image rotation unit, and a control unit for controlling the rotation of the image by the image rotation unit such that a staple position of the output medium formed by the image forming unit comes to a predetermined position.

Copy apparatus which controls binding position through image rotation

A memory management control device and a memory management control method capable of preventing run away of an image processing apparatus caused by a rewrite to a memory, are provided. In rewriting a program stored in a flash memory 402 of a controller 400 included in an image processing apparatus, an operating state detector 500 detects the operating state of the image processing apparatus and transmits the detection result to an external apparatus 9. On the basis of this detected operating state, the external apparatus 9 performs rewrite control for the flash memory 402. If the image processing apparatus is in operation, or is in an intermediate state, an abnormal state, or a wait state, a rewrite action is executed after the state is canceled.

Memory management control device and method for performing rewrite on

An image processing apparatus for converting color images into monochromatic pattern images. The image processing apparatus includes: means for detecting the area of a color image; means for converting a color image into a monochromatic pattern image; and control means for varying such image processing in accordance with the result of detection made by the means for detecting the area. When a thin line is detected in a color area, the method of processing is determined based on the width of the detected thin line. For example, when the width of the thin line is smaller than a predetermined value, the area of such thin line may be outputted as a plain image instead of a pattern image so that it may easily be seen or recognized. The contour of a color area may be made conspicuous by combining a plain image and a pattern image.

Image processing apparatus for converting a color image into a pattern

Image forming apparatus and method in which image of a plurality of

An image forming apparatus having an input section for inputting handwritten characters and a character recognition device for recognizing the character types in the handwritten characters inputted from the input section. Character pattern data is generated representing the character types recognized by the character recognizing device. A scanning device scans an original document image and forms an image produced by combining character pattern data generated by the generating device with the scanned image of the original document.

Image forming apparatus

Growing community of inventors

Kashiwa, Japan

Masafumi Kamei