Canon Kabushiki Kaisha

Other

Shinobu Arimoto

Kazuo Yoshinaga

Nobuatsu Sasanuma

Takehiko Nakai

Toshio Hayashi

Tsutomu Utagawa

Tetsuya Nagase

Katsuichi Shimizu

Katsuyoshi Maeshima

Masahiro Funada

Hiroshi Tanioka

Nao Nagashima

Masanori Yamada

Yoshiki Uchida

Tadashi Yoshida

Michio Kawase

Asao Watanabe

Takashi Suzuki

Atsushi Takeda

Shizuo Hasegawa

Junichi Noguchi

Yoshiyuki Suzuki

Nobuyuki Watanabe

Yoshinori Ikeda

Yukio Nagase

Kazuhisa Kemmochi

Akihiro Usami

Yutaka Komiya

Yushi Matsukubo

Katsuhito Kato

Kazuhito Ohashi

Tetsuya Nozaki

Masanori Muramatsu

Hajime Suzuki

Atsutomo Yoshizawa

Yoshinori Mochida

Tetsuya Nakamura

Hiroyuki Tsuji

Yoichi Takaragi

Yukihiko Shimizu

Akiko Kanno

Tetsuro Fukusaka

Yoshinobu Sato

Shingo Kitamura

Junko Kuramochi

Toshihiko Otsubo

Tsunao Hombo

Tsunao Honbo

Hisakazu Okubo

Image processing method and apparatus

Black correction to character, lines, and the like, is performed smoothly so as to maintain quality of an image as much as possible. In a character thickness determining circuit of a black character determination unit , the thickness of characters and lines are determined based on RGB signals. Further, character/line outline information is obtained at an edge detector , and chromaticity information is obtained at a chromaticity determining unit . When an image processing is performed based on the combination of the outline information and the chromaticity information, a thickness determination signal is corrected so that the thickness of the character, lines, and like changes continuously.

Image processing apparatus and method that determines the thickness of characters and lines

Forming an image by utilizing a scanning device for scanning a color image for each color element, a reading device for reading image data for each scanned line, a rotary polygon mirror for deflecting, in a main scan direction, a modulated light beam that is based on the image data for each read line, so that an image holding member that is rotated in a sub-scan direction is scanned by the deflected light beam and a latent image is formed thereon, a first generation device for determining whether the light beam deflected by the rotary polygon mirror has scanned a predetermined location, and for generating a main scan start reference signal, and a second generation device for generating a sub-scan start reference signal in synchronization with the rotation of the image holding member, a first control device that controls the rotary polygon mirror and the rotary image holding member, so as to maintain a phase difference between the sub-scan start reference signal and the main scan start reference signal, no matter how many times the rotary image holding member is rotated, a second control device, in synchronization with the sub-scan start reference signal, which starts to drive the scanning device, a third control device, in synchronization with the main scan start reference signal, starts the reading of an original document by the reading device, and a fourth control device, in synchronization with the main scan start reference signal, starts to use the light beam to form a latent image.

Image forming with synchronized control

This invention provides an image reading device capable of precise detection of the optical signal over a wide wavelength range, by forming a photoelectric converting unit for converting the visible light into an electrical signal and a photoelectric converting unit for converting the invisible light into an electrical signal, in monolithic manner on a single semiconductor chip.

Image reading device

There is disclosed an image recording apparatus having reader for photoelectrically reading an original and generating image information, a first transmitter for transmitting the image information from said reader, after compressing treatment, to an outside apparatus, a second transmitter for transmitting the image information from said reader without compressing treatment to an outside apparatus, and selecter for selecting either said first or second transmitters according to the destination of said image information.

Image processing apparatus

An image processing system comprises a printer and a reader which are mechanically and functionally separated in such a manner that they can be used independently of each other and the transmission of image information is possible therebetween. Said reader includes an operating unit which cooperates with the printer to perform many functions such as the image operating function, the image transfer function, the presetting function and the image quality processing function, in addition to a function of a conventional copier. Said operating unit consists of a general purpose key portion; a soft key portion which is used for optionally creating the copy transfer functions and having function keys and displays corresponding to said keys, said displays being adapted to display key labels and messages to a user in cooperation with a driver, CPU and controller; and a function key preset key portion which is used for registering, reading and resetting the image transfer functions and having a standard mode return key, preset keys and preset key displays corresponding to said reset keys and adapted to display the reset position.

Image processing system

In a control device for a vibration wave motor, in the case where the device executes an operation involving a large variation in the load while the motor is controlled at a target speed by the driving frequency using a feedback system, such feedback control is inhibited or the response of the feedback control is restricted in order to avoid the drawback resulting from feedback control at the time of generation of the variation in the load.

Drive control method for vibration wave motor, device therefor, and apparatus and image forming apparatus equipped with vibration wave motor

In forming a multi-colored image by superimposing a plurality of plane images, positional offsets of the plane images are prevented, thereby obtaining high quality color images. The timing at which image data corresponding to each plane image is generated is controlled in accordance with the phase difference between the sub-scanning start signal indicating the rotational timing of an image carrier and the main-scanning start signal representing the rotational timing of a rotating polygonal mirror. Various controls are further performed.

Image forming apparatus and control method therefor

An image processor includes a first reader which obtains a first signal corresponding to visible information read on an original, and a second reader which obtains a second signal corresponding to invisible information on the original. A comparator compares the first and second signals to discriminate a predetermined pattern on the original.

Method and apparatus for determining a predetermined pattern on an original based on visible and invisible information on the original

An image processing apparatus includes a first detection unit for detecting an edge of an input image on the basis of an input image signal, a second detection unit for detecting a screen portion of the input image on the basis of the input image signal, a processing unit for executing processing of the input image signal according to detection results of the first and second detection units, and a setting unit for setting detection modes of the first and second detection units.

An image processing apparatus and method includes a device for judging the degree of color or lack of color of an input color image signal, judging dot areas in input color image signal and controlling a spacial filter or a density conversion device for processing the input image signal according to a judgment by the first and second judging results, the spacial filter or the density conversion device being controlled according to the judgment by the first and second judging results, wherein the image processing also includes the ability to independently set sharpness of each of a plurality of color component signals.

Image processing apparatus including means for judging a chromatic portion of an image

An invisible information detection apparatus includes parts that irradiate a light onto a medium, detect infrared light generated from the medium, and judge a specific pattern consisting of a combination of two areas on the medium in accordance with the detection result. One of the areas represents higher reflectance than the reflectance of the medium in substantially the same infrared wavelength region, and the other area represents lower reflectance than that of the medium. An invisible information detection method comprises an irradiation step, a detection step and a judgment step. The judgment step judges a specific pattern of a combination of two areas on the medium in accordance with the result from the detection step. One of the areas represents higher reflectance, and the other area represents lower reflectance, as compared to the reflectance of the medium, in substantially the same infrared wavelength region.

Invisible information detecting apparatus

It is provided an image formation apparatus which forms a color image by superimposing an image corresponding to each of plural-color image data on an image support body, comprises a light beam generation means for generating a light beam which has been modulated according to each-color image data included in the plural-color image data, a rotation polygon mirror for performing scanning on a photosensitive body by using the light beam, a position signal generation means for outputting a position signal representing a scanning position on the photosensitive body, in case of performing the scanning on the photosensitive body by using the light beam corresponding to first-color image data included in the plural-color image data, and a control means for controlling rotation driving of the rotation polygon mirror corresponding to second and subsequent colors, in response to the position signal. Therefore, it can be obtained a new method for superimposing plural-color plane images without aberration in position, in case of forming a color image by superimposing the plural-color plane images on the image support body such as the photosensitive body, an intermediate transfer body, a recording paper on a transfer body or the like.

Image formation with controlled scanning

An image signal that enters line by line is subjected to italicization processing in a zoom unit. When an input image signal is stored in memory, a controller performs control in such a manner that the write starting address is changed, line by line, in dependence upon angle of italicization (amount of image inclination) and zoom rate.

Image processing apparatus and method for performing image inclination

Growing community of inventors

Yokohama, Japan

Shinobu Arimoto