Canon Kabushiki Kaisha

Yoshiyuki Komiya

Fumiteru Gomi

Kouichi Hashimoto

Atsushi Takeda

Koichi Hashimoto

Kenichi Shibuya

Shuichi Kadota

Yoichi Kimura

Satoru Fukushima

Makoto Ohki

Shigeru Matsuzaki

Kuoichi Hashimoto

In an image forming apparatus, deterioration of images is suppressed when distortions of scanning lines of a plurality of light sources are corrected. Image data is corrected each in a sub-scanning direction corresponding to the plurality of light sources, in accordance with distortion characteristics of the scanning lines of the plurality of light sources, for each of divided regions, common to a plurality of light sources, divided in a main-scanning direction, and the plurality of light sources are driven based on the image data each corrected corresponding to the plurality of light sources.

Image forming apparatus

A method for an image forming apparatus includes scanning a document containing a copy-forgery-inhibited pattern having a latent-image part to be highlighted when the copy-forgery-inhibited pattern is copied and copy restriction information for restricting the number of times of copying, decoding the copy restriction information contained in the document image scanned, removing the copy-forgery-inhibited pattern from the document image scanned, updating the decoded copy restriction information, and forming, on a sheet, the updated copy restriction information with the image which the copy-forgery-inhibited pattern has been removed from the document image.

Image forming apparatus with copy restriction function

An image forming apparatus includes a profile storage section that stores distortion characteristic of a scanning line, a correcting section that corrects image data by lines in the sub scanning direction, and a registration sensor that detects a pattern image for detecting color misregistration amounts in a sub scanning direction of images formed on an intermediate transfer member. When the pattern image is formed, the distortion correcting section shifts image data of the pattern image by lines in the sub scanning direction so that, with reference to a detection position of the registration sensor, a positional displacement amount of the pattern image in the sub scanning direction becomes less than or equal to &#xbd; of a scanning-line distance, in accordance with a positional displacement amount of the scanning line in the sub scanning direction at a detection position of the registration sensor along a main scanning direction.

An image forming apparatus has an image carrier carrying an electrostatic latent image, a charging unit charging the surface of the image carrier, an exposure unit forming an electrostatic latent image by irradiating light onto the charged surface of the image carrier, a developing unit developing the electrostatic latent image formed on the surface of the image carrier using a developing material, and a transfer unit transferring a developer image onto a printing material. The apparatus has also an image correction unit correcting image data inputted to the exposure unit so as to compensate for deformation in the developer image originating in a form of the exposure unit, and a smoothing processing unit carrying out smoothing of an image by controlling the exposure unit so that dots of a size smaller than one pixel are filled with respect to a white image region of the corrected image data.

Image forming apparatus, and control method and control program thereof

In an image forming apparatus, an image forming contrast potential for obtaining the maximum density is set by reading a specific pattern transferred and formed on a sheet. A photosensor detects the density of a specific pattern formed on an image carrier at the image forming contrast potential, and the detection result is stored. A correction amount for the image forming contrast potential is calculated on the basis of the relationship between the stored detected density, and the density, detected by the optical sensor, of the specific pattern formed on the image carrier at a predetermined timing. The image forming contrast potential is adjusted by the correction amount.

Image forming apparatus and image forming apparatus control method

An image forming apparatus includes, for example, a pattern generating unit, image processing unit, image recording unit, and correction unit. The pattern generating unit generates a test pattern signal used to form a test pattern including a plurality of tone patches differing in tonality from each other. The image processing unit performs image processing on the test pattern signal according to a predetermined image processing mode out of a plurality of image processing modes related to tone characteristics. The image recording unit records the test pattern on a recording medium according to the test pattern signal processed by the image processing unit. The correction unit corrects the image processing mode based on a result of reading the test pattern recorded on the recording medium. In particular, the image recording unit records a background pattern around periphery of the test pattern.

Image forming apparatus and tone characteristics correction method

An image forming apparatus includes a first reading device which reads a reference image formed on a sheet, a second reading device which reads a reference image formed on an image carrier, a control device which can execute a first control process for adjusting image formation conditions based on a density of the reference image acquired from a read result of the first reading device, and a second control process for adjusting the image formation conditions based on a density of the reference image acquired from a read result of the second reading device, wherein the control device executes the second control process before performing image formation based on the image data when the first control process has not been executed in a period from when mounting of the unit configuring the image forming device is detected to when image formation is performed.

A technique of shortening the adjustment time of image forming conditions in accordance with the use status of each apparatus without degrading the image quality is disclosed. In a color image forming apparatus which has an adjustment unit that adjusts image forming parameters for setting image forming conditions, and which forms an image on a printing medium using the adjusted image forming parameters, the use log of the color image forming apparatus is collected, and at least one image forming parameter is selected in correspondence with the collected use log as an image forming parameter to be adjusted by the adjustment unit in next adjustment, by referring to a storage unit which stores, in correspondence with the use log, at least one image forming parameter to be adjusted by the adjustment unit.

Image forming apparatus including image formation adjustment based on prior use

An image forming apparatus including an image forming device which forms images on an image carrier and forms the images in a plurality of image formation regions on an intermediate transfer body controls image adjustment and image formation execution in the plurality of image formation regions on the intermediate transfer body (S, S).

Image forming apparatus and control method for image forming apparatus

An information processing apparatus receives image data and an output condition. The information processing apparatus combines additional data to the received data and enables a first output device to perform the test printing based on the output condition. After the user checks the result of the test printing, the information processing apparatus enables a second image output device to perform the actual printing of the image data based on the output condition. A charge for the test printing is accounted in accordance with the combined additional information.

Image processing system, information processing apparatus, control method of the information processing apparatus, and storage medium for storing program for implementing the control method

Image forming apparatus which can clean auxiliary member erasing image traces

An image forming apparatus includes a plurality of image bearing members and a plurality of image forming devices for forming toner images on the respective image bearing members, wherein the toner images formed on the respective image bearing members by the respective image forming devices are successively transferred to a transfer medium, and wherein a toner image for identifying the apparatus is formed on the image bearing member having the highest temperature among the plurality of image bearing members.

Image forming apparatus featuring a temperature-sensitive apparatus identifying feature

An image forming apparatus includes an image bearing member which is movable; an electrifying device which makes contact with the image bearing member and electrifies the image bearing member; a developing device for developing a latent image on the image bearing member by toner; and an abutting member which is provided on a downstream side in a moving direction of the image bearing member with respect to the electrifying device and the contacting portion of the image bearing member and abuts against the image bearing member. The image bearing member, electrified by the electrifying device, is exposed to have the latent image formed thereon, a toner image formed on the image bearing member by the developing device is transferred to a recording material, and the developing device recovers residual toner on the image bearing member after transfer.

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Abiko, Japan

Yoshiyuki Komiya