Dot Density Or Dot Size Control (e.g., Halftone) Patents (Class 347/131)
  • Patent number: 10706340
    Abstract: This image processing apparatus inputs a density value for each pixel of image data and an attribute indicating an object type to which the pixel belongs, processes one pixel of input image data as a pixel of interest in turn, and in accordance with at least the attributes of the pixel of interest and two pixels which sandwich the pixel of interest, executes image processing for replacing the density value of the pixel of interest with the density value of one pixel out of two pixels.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: July 7, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kenichirou Haruta
  • Patent number: 10656549
    Abstract: An image forming apparatus includes a photosensitive member; a scan unit configured to scan the photosensitive member with light based on image data, and form a latent image on the photosensitive member; a developing unit configured to form an image on the photosensitive member by attaching toner to the latent image formed on the photosensitive member; and a correction unit configured to correct an exposure amount of the photosensitive member such that a density change of the image in a main scanning direction due to a configuration of the scan unit and a density of the image to be formed is reduced.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: May 19, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoo Akizuki, Kenichi Iida, Hikaru Osada, Yusuke Shimizu
  • Patent number: 10591822
    Abstract: An imaging device for projecting individually controllable laser beams onto an imaging surface movable in an X-direction. The device includes a plurality of semiconductor chips each comprising a plurality of laser beam emitting elements arranged in a main array of M·N. The chips are mounted such that each pair of adjacent chips in the Y-direction are offset from one another in the X-direction and, if activated continuously, the emitted laser beams of the two chips of said pair trace on the imaging surface a set of parallel lines that are substantially uniformly spaced in the Y-direction. In addition to the M·N elements of the main array, each chip comprises at least one additional column on one or each side, each additional column containing at least one selectively operable element capable of compensating for any misalignment in the Y-direction in the relative positioning of the adjacent chips on the support.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: March 17, 2020
    Assignee: LANDA LABS (2012) LTD.
    Inventors: Nir Rubin Ben Haim, Michael Nagler, Benzion Landa, Tamar Kashti, Ofer Aknin, Ronen Yogev, Itai Tzur
  • Patent number: 10580668
    Abstract: In a substrate processing apparatus, a phosphoric acid aqueous solution is supplied to a processor, and a liquid collection from the processor is concurrently performed. Further, a silicon concentration is adjusted, to supply an adjusted processing liquid to the processor. Thus, a phosphoric acid aqueous solution film is formed on the substrate. The liquid film is heated by a heating device. The heating device has lamp heaters in a casing made of a silica glass. The phosphoric acid aqueous solution on the substrate is irradiated with infrared rays. A nitrogen gas flowing in a gas passage formed in the casing is discharged towards a position outside an outer periphery of the substrate.
    Type: Grant
    Filed: April 2, 2019
    Date of Patent: March 3, 2020
    Assignee: SCREEN Holdings Co., Ltd.
    Inventors: Taiki Hinode, Takashi Ota, Kazuhide Saito, Kunio Yamada
  • Patent number: 10559106
    Abstract: A method includes obtaining a to-be-processed current point in a target area in a current frame, obtaining a first-type smoothing weight of a first-type neighborhood point in an Nth frame before the current frame with respect to the current point, where the first-type neighborhood point is an Xth circle point that encircles a point corresponding to a location of the current point and that is in the Nth frame before the current frame, obtaining a second-type smoothing weight of a second-type neighborhood point in an Mth frame after the current frame with respect to the current point, where the second-type neighborhood point is a Yth circle point that encircles the point corresponding to the location of the current point and that is in the Mth frame after the current frame, and performing smoothing calculation on the current point according to the first-type smoothing weight and the second-type smoothing weight.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: February 11, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Kongqiao Wang, Jiangwei Li, Hao Wang, Xiuyan Guo
  • Patent number: 10514648
    Abstract: An exposure device irradiates a photoconductor with light on the basis of an exposure signal and thereby forms an electrostatic latent image. A toner amount calculating unit (a) determines a distribution pattern of the electrostatic latent image on the basis of the exposure signal, (b) determines an electric field variation level of a target pixel, (c) determines an electric field intensity of the target pixel on the basis of a value of the target pixel in the distribution pattern and the electric field variation level, and (d) determines a toner consumption amount corresponding to the electric field intensity. Further, using spatial filters independently of each other in a primary scanning direction and in a secondary scanning direction, the toner amount calculating unit determines the electric field variation level on the basis of (a) the distribution pattern or (b) the exposure signal.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: December 24, 2019
    Assignee: Kyocera Documents Solutions, Inc.
    Inventors: Toshiaki Mutsuo, Hiroki Tanaka, Takayuki Mashimo
  • Patent number: 10477068
    Abstract: An image processing apparatus includes processing circuitry. The processing circuitry is to acquire image data including primary color image data for primary color and spot color image data for spot color; generate primary color halftone data representing the primary color image data as a group of halftone dots, using a primary color screen specifying cyclic arrangement of lines of halftone dots; and generate spot color halftone data representing the spot color image data as a group of halftone dots, using a spot color screen having a second phase that is different from a first phase represented by the cyclic arrangement of lines specified in the primary color screen.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: November 12, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuki Sagimori, Akiho Watanabe
  • Patent number: 10429640
    Abstract: An image forming apparatus includes: a specification unit configured to perform surface specification processing for specifying a reflective surface that deflects light; a correction unit configured to perform correction processing for correcting image data in accordance with which reflective surface deflects light; and a control unit configured to control so as to cause scanning of a first photosensitive member to start before the surface specification processing completes, and control so as to, after the surface specification processing completes, cause the correction processing to be performed, with respect to image data for causing light to be emitted from a second light source and in accordance with a specification result of the surface specification processing, and cause scanning of the second photosensitive member to start.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: October 1, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takaomi Uezono, Hiroyuki Yamazaki
  • Patent number: 10312115
    Abstract: A processing liquid is supplied from a supply tank to a processing liquid nozzle of a processing unit, and the processing liquid is supplied from the processing liquid nozzle to a substrate. The processing liquid used in the processing unit is collected and selectively supplied to first and second replenishment tanks. In a period in which the used processing liquid is supplied to the first replenishment tank, the supply tank is replenished with the processing liquid in the second replenishment tank, and the processing liquid in the first replenishment tank circulates while being heated by a heater. In a period in which the used processing liquid is supplied to the second replenishment tank, the supply tank is replenished with the processing liquid in the first replenishment tank and the processing liquid in the second replenishment tank circulates while being heated by the heater.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: June 4, 2019
    Assignee: SCREEN Holdings Co., Ltd.
    Inventor: Toshimitsu Namba
  • Patent number: 10295947
    Abstract: An exposure device irradiates a photoconductor with light on the basis of an exposure signal and thereby forms an electrostatic latent image. A toner amount calculating unit (a) determines a distribution pattern of the electrostatic latent image on the basis of the exposure signal, (b) determines an electric field variation level of a target pixel, (c) determines an electric field intensity of the target pixel on the basis of a value of the target pixel in the distribution pattern and the electric field variation level, and (d) determines a toner consumption amount corresponding to the electric field intensity. Further, the toner amount calculating unit limits the electric field variation level to an uppermost value or less, the uppermost value corresponding to a value of the target pixel in the distribution pattern of the electrostatic latent image.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: May 21, 2019
    Assignee: Kyocera Document Solutions, Inc.
    Inventors: Toshiaki Mutsuo, Hiroki Tanaka, Takayuki Mashimo
  • Patent number: 10295928
    Abstract: An image forming apparatus includes an image processing unit configured to perform image processing corresponding to an image forming mode on image data; a controller configured to control the image processing unit to perform the image processing corresponding to the image forming mode on measurement image data, control an image forming unit to form the measurement image based on the measurement image data, to control a measurement unit to measure the measurement image, and to control an image forming condition based on a measurement result. In a case where the measurement image is formed while the image forming apparatus consecutively forms a plurality of images in the second image forming mode, the controller controls the image forming unit to form the measurement image without performing the image processing corresponding to the second image forming mode.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: May 21, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuhiro Akiba
  • Patent number: 10277752
    Abstract: In one example, a document scanner having a document-receiving platen. The platen includes a plurality of alignment patterns disposed on the platen at known positions in a coordinate system. The scanner includes overlapping staggered scan bars disposed adjacent the platen, each scan bar fixed at a position to image a one-dimensional slice of a corresponding one of the alignment patterns. The scanner further includes a controller to determine, from the imaged slice, X and Y coordinates of each corresponding scan bar within the coordinate system.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: April 30, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Jorge Miguel Gomez Lucia
  • Patent number: 10216132
    Abstract: In one example, a printing process includes: forming a first latent image on a photoconductor; applying a first LEP ink to the photoconductor to develop the first latent image into a first ink image; forming a second latent image having a first part on the first ink image and a second part on the photoconductor; and applying a second LEP ink to the first ink image and to the photoconductor to develop the second latent image into a second ink image and form a composite on the photoconductor in which some of the second ink image overlaps some of the first ink image.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: February 26, 2019
    Assignee: HP INDIGO B.V.
    Inventor: Shmuel I. Borenstain
  • Patent number: 10071586
    Abstract: A light irradiation apparatus includes an irradiation unit including a light source to emit light to a process-target object, a light source driving circuit to drive the light source, a light source controller to control the light source driving circuit to change a light output level of the light source, and a light spot controller to control energy or energy density of a beam spot of the light on the process-target object depending on an operation mode, and a transition mode that one operation mode is being changed to another mode. The light spot controller sets the energy or energy density during the transition mode lower compared to either of the energy or energy density during the one operation mode before the transition mode and the energy or energy density during the another mode after the transition mode.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: September 11, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masataka Uehira, Kohji Sakai, Tomoyasu Hirasawa, Tomomi Ishimi
  • Patent number: 9778593
    Abstract: An image forming apparatus includes an image forming section that includes a latent image bearer; a charger to charge a surface of the latent image bearer; and a latent image writer to write a latent image on the charged surface of the latent image bearer. The image forming apparatus further includes a developing device to develop the latent image with a developer borne on a developer bearer; and a cyclical changing device including a controller and a write controller, in combination. The cyclical changing device cyclically changes a developing bias to be applied to the developer bearer while cyclically changing a charge intensity of the charger during the image formation by the image forming section. The cyclical changing device cyclically changes the developing bias and the charge intensity, and a latent image write intensity of the latent image writer.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: October 3, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shuji Hirai, Satoshi Kaneko, Terumichi Ochi
  • Patent number: 9749495
    Abstract: An information processing apparatus includes a resolution converting unit that converts the resolution of input image data into a low resolution by using a “reference shift” method; a dot processing unit that deletes a dot area that occurs on an edge portion of an object in image data that is obtained by the resolution converting unit; and a format converting unit that converts image data, from which the dot is deleted by the dot processing unit, into the format of an output processing unit that prints the input image data with a low resolution.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: August 29, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventor: Yoshitomo Kobayashi
  • Patent number: 9734438
    Abstract: An image processing method generates image data of an image made up of a plurality of dots and having resolution in a first direction and resolution in a second direction. The second direction intersects the first direction. The resolution in the first direction is different from the resolution in the second direction. The image processing method includes performing contour portion correction including adding a dot at a correction target pixel, the correction target pixel being a pixel adjacent to a step-like contour portion in the image, and when a dot is arranged at a pixel adjacent to a pixel of interest adjacent to the correction target pixel, deleting the dot at the pixel of interest.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: August 15, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventor: Shigetoshi Hosaka
  • Patent number: 9709922
    Abstract: An image processing apparatus includes a generation unit configured to generate a composite image to be combined with an input image, a first calculation unit configured to perform, based on a type of the composite image, approximation calculation of a value indicating a toner amount to be used in printing the composite image generated by the generation unit, a second calculation unit configured to calculate, based on a value indicating a toner amount to be used in printing the input image and the value indicating the toner amount to be used in printing the composite image, which is obtained by approximation calculation performed by the first calculation unit, a value indicating a toner amount to be used in printing the input image combined with the composite image, and a notification unit configured to notify a printing unit of the value calculated by the second calculation unit.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: July 18, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tateki Narita
  • Patent number: 9703244
    Abstract: An image forming apparatus includes: a photoconductor drum; an optical scanning device that drives a light source to scan a surface of the photoconductor drum and form a latent image on the surface; a developing device that develops the latent image; and a density detector to detect density variation of an image in a rotation direction of the photoconductor drum, the image being developed by the developing device. The optical scanning device includes a processing device that is capable of correcting a driving signal for driving the light source on a basis of an output signal of the density detector to adjust at least either one of a correction period and a correction strength of correction data for the driving signal for a rotation period of the photoconductor drum.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: July 11, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Muneaki Iwata, Masaaki Ishida, Atsufumi Omori, Naoto Watanabe, Hayato Fujita
  • Patent number: 9659243
    Abstract: An image forming apparatus includes: an image processor configured to perform first image processing on image data having a first resolution and to add tag data to a target pixel where second image processing is to be performed; a resolution converter configured to convert the image data into image data having a second resolution higher than the first resolution, and to perform the second image processing based on arrangement of the image data having the first resolution and the tag data; a pulse generator configured to generate an on-off modulation signal and an application-current switching signal in accordance with the image data having undergone the second image processing; and a light source driver configured to drive the light source in accordance with a current setting value output from an application current setter depending on the application-current switching signal and the on-off modulation signal.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: May 23, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hayato Fujita, Masaaki Ishida, Atsufumi Omori, Muneaki Iwata
  • Patent number: 9513574
    Abstract: An image forming apparatus includes an electrostatic latent image bearer; a charger to charge a surface of the electrostatic latent image bearer; a power source to output a charging bias supplied to the charger; an electrostatic latent image writing unit to write an electrostatic latent image on the surface of the electrostatic latent image bearer charged by the charger; a developing unit including a developing member to develop the electrostatic latent image to obtain a toner image; a developing power source to output a developing bias supplied to the developing unit; a processor to adjust the charging bias output from the power source to a predetermined target value; and a storage unit to store an adjustment value algorithm.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: December 6, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroyuki Sugiyama, Shigekazu Koguchi, Masahiko Shakuto, Shinji Minami, Tomoko Takahashi, Yoshinori Nakagawa, Ryuji Yoshida, Taichi Urayama
  • Patent number: 9387685
    Abstract: There are provided an image formation device, an image formation method, a program, and an image forming product capable of preventing noise and granularity of an image from deteriorating even when dots with a plurality of dot sizes are arranged to be aggregated. When a continuous tone image signal is a signal which indicates a tint image, at least one of dot aggregation portions 16, 18, 68, and 72 is formed through arrangement for aggregation of dots 14 (dots 14L and 14S) with two or more dot sizes, on a part of dot images 10, 12, 66, and 70 which are indicated by dot image signals. In addition, the dot aggregation portions 16, 18, 68, and 72 are formed through arrangement for non-aggregation of the dots 14 (dots 14L) with at least one dot size.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: July 12, 2016
    Assignee: FUJIFILM Corporation
    Inventor: Takashi Wakui
  • Patent number: 9280115
    Abstract: An image forming apparatus comprises: a counting unit which counts the number of pixels at each tone level in a halftone image corresponding to an input image; a determination unit which determines a halftone region in the halftone image; an acquisition unit which acquires tone characteristic information of an output density of the image forming apparatus; a correction unit which obtains a density in a region to be formed by using a developing material from the number of pixels at each of the tone levels and information of the halftone region and correct the density in accordance with the tone characteristic information; and a first prediction unit which predicts a consumption amount of the developing material by using the density corrected by the correction unit.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: March 8, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Jun Nagai
  • Patent number: 9229408
    Abstract: A method is disclosed. The method includes estimating a quantity of toner to be used to print a job at a printer by calculating a buildup of toner at edges of data on each page of the print job.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 5, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Chai Wah Wu, Barry M. Trager, Mikel J. Stanich, Kartheek Chandu
  • Patent number: 9229398
    Abstract: An image forming apparatus includes a body, a cartridge, detachably mountable to the body, configured to form a toner image, an information recording portion provided in the cartridge and configured to record information, a control portion provided in the body and configured to electrically communicate with the information recording portion, and a connector provided in the body and configured to electrically connect the control portion with the information recording portion. The connector has a temperature detecting portion configured to detect temperature.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshiro Tomono
  • Patent number: 9177396
    Abstract: An image processing apparatus uses an edge component of an input image in which a little low-frequency component of a dark part is retained as a luminance signal, synthesizes a large blurring component generated from the input image as a color component, and realizes a taste of natural watercolor paintings in which gradation is not inverted from a bright part to the dark part when a color is placed on a rough line drawing in watercolor-like processing.
    Type: Grant
    Filed: June 4, 2013
    Date of Patent: November 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiroaki Nashizawa
  • Patent number: 9092854
    Abstract: A system includes a structure module, graininess module, mottle module, and standard deviation (STD) module. The structure module is to identify a structure metric based on an input digital image, and remove a structured nonuniformity from the input digital image to produce a second input digital image. The graininess module is to identify a graininess metric based on the second input digital image. The mottle module is to identify a mottle metric based on the second input digital image. The STD module is to identify a STD metric that is to correspond to overall smoothness of the input digital image.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: July 28, 2015
    Assignee: Hewlett-Packard Indigo B.V.
    Inventors: Oren Haik, Tal Frank, Tamar Kashti
  • Patent number: 9007651
    Abstract: In the generation of a threshold matrix for Nx speed writing, first and second areas are set, the first area being a cluster of a plurality of first partial areas substantially evenly distributed in a matrix space, and the second area being an area of the matrix space excluding the first area. Next, at least two writing elements in each of the first partial areas are allocated occurrence numbers and changed into determined elements. Then, at least one writing element in the second area is allocated an occurrence number and changed into a determined element. Thereafter, the other writing elements are allocated occurrence numbers and changed into determined elements. In accordance with the occurrence numbers, the threshold value of each writing element is determined to obtain a threshold matrix for Nx speed writing. This results in a reduction in the graininess of an image in a highlight area.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: April 14, 2015
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventors: Hiroshi Asai, Ikuhiko Takahama
  • Patent number: 8964257
    Abstract: An image forming apparatus of this invention, when an exposure unit performs exposure, applies, to image data quantized by a first number of bits, compensation data for compensating for unevenness of the exposure intensity occurring on a photosensitive member caused by a lens array used in the exposure unit. This compensation data is obtained by quantizing, by a second number of bits larger than the first number of bits, data corresponding to a change in measurement value obtained by measuring unevenness of exposure occurring on the photosensitive member from a reference value used in the measurement, and requantizing the quantized data by the first number of bits by using sigma-delta modulation.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: February 24, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shimpei Matsuo
  • Patent number: 8964243
    Abstract: MFP matches low-resolution binary image data received by facsimile with a dot pattern showing a jaggy. If there is any matching region, the image data is converted into multivalued image data by performing jaggy correction in which the tone of a target dot in the region is substituted with a grayscale. MFP also generates a region identification attribute code based on the result of matching and the tone of the input image data. MFP enhances the respective resolutions of the image data after jaggy correction and the region identification attribute code. MFP then binarizes the image data having the enhanced resolution once again by a binarization method according to the region identification attribute code having the enhanced resolution.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: February 24, 2015
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Tomohiro Yamaguchi
  • Patent number: 8963980
    Abstract: An image forming apparatus includes an image information retrieval unit that retrieves image information of an image to be formed on a recording material, a density information retrieval unit that retrieves information relating to an image density of the image to be formed in accordance with the image information through analysis of the image information retrieved by the image information retrieval unit, an exposure unit that exposes a rotating image carrier to light in response to the image information retrieved by the image information retrieval unit, and a setting unit that sets, in accordance with the information relating to the image density retrieved by the density information retrieval unit, an exposure period according to which the exposure unit exposes the rotating image carrier to light.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 24, 2015
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Takakazu Kobayashi
  • Patent number: 8922834
    Abstract: A method is disclosed. The method includes generating a Continuous Tone Image (CTI) with all pixel values same as a first gray level, generating an initial Half Tone Image (HTI) with all pixel values equal to minimum absorptance level and computing a change in pixel error for a first pixel. The change in pixel error is computed by identifying a first pixel indicated in a valid pixel map, toggling the first pixel with all the possible output states and swapping the first pixel with all neighbor pixels only if the stacking constraint is satisfied, updating the HTI with the maximum error decrease operation and continue to next pixel location till the end criteria is met.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: December 30, 2014
    Assignee: Ricoh Production Print Solutions LLC
    Inventors: Kartheek Chandu, Mikel J. Stanich, Chai Wah Wu, Barry M. Trager
  • Patent number: 8848246
    Abstract: An image recording apparatus generates black, cyan, magenta, and yellow halftone image data from a multi-tone color image. When the cyan halftone image data is generated, the size of a cyan dot to be formed at a target pixel position is provisionally determined and added to the size of a black dot to obtain a total dot size. When the total dot size is less than or equal to a first threshold dot size, the cyan dot size is determined to be the provisionally determined size, and when the total dot size is greater than the first threshold dot size, the cyan dot size is determined to be the largest dot size within the range of a difference between the first threshold dot size and the black dot size. It is possible to prevent excessive overlapping of black and cyan dots.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: September 30, 2014
    Assignee: Dainippon Screen Mfg. Co., Ltd.
    Inventor: Hiroshi Asai
  • Publication number: 20140253658
    Abstract: An electrostatic latent image forming method for forming, on an image carrier, an electrostatic latent image that has a pattern where there are an irradiated area and a not-irradiated area in a mixed manner, the electrostatic latent image forming method comprises; adjusting an exposure condition of an irradiated area that is included in the irradiated area and is adjacent to the not-irradiated area so that an electric field intensity of an electrostatic latent image that corresponds to the not-irradiated area is increased so as to prevent adhesion of a developer, and irradiating the image carrier with light under the adjusted exposure condition.
    Type: Application
    Filed: February 6, 2014
    Publication date: September 11, 2014
    Inventors: Hiroyuki SUHARA, Hiroaki TANAKA
  • Patent number: 8786646
    Abstract: A light-emitting chip includes: a substrate; plural light-emitting elements arrayed in line on the substrate, each of the light-emitting elements including a light-emitting region having a length in an array direction of the array different from a length in a direction orthogonal to the array direction; and a light-up current supplying interconnection including plural connecting portions, each of the connecting portions being provided on the light-emitting region of a corresponding one of the light-emitting elements in a shorter direction of the light-emitting region either the array direction or the direction orthogonal to the array direction, each of the connecting portions being connected to an electrode provided on the light-emitting region, the light-up current supplying interconnection supplying a current for lighting up to the plural light-emitting elements through the plural connecting portions.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: July 22, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Taku Kinoshita, Yoshinao Kondoh, Seiji Ohno
  • Patent number: 8736907
    Abstract: An image processing apparatus comprises a dither processing device that applies dither processing to input image data to express halftone using line screens by increasing an area rate of the input image data and a controller that decreases the number of line screens and maintains a prescribed dropout width between the neighboring line screens when the area rate of the input image data increases and the dropout width falls below a prescribed level.
    Type: Grant
    Filed: November 14, 2011
    Date of Patent: May 27, 2014
    Assignee: Ricoh Company, Ltd.
    Inventor: Hiroyuki Igawa
  • Patent number: 8693058
    Abstract: An image forming apparatus is provided. The image forming apparatus includes a communication interface unit which receives print data, a rendering unit which converts the received print data into a bitmap image by rendering, a binarization unit which generates binary data by carrying out halftoning with respect to the bitmap image, a data combining unit which generates multi-bit data by combining a plurality of successive binary data of the generated binary data, and a print engine which forms an image on a print paper using the generated multi-bit data.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: April 8, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyeong-man Kim
  • Patent number: 8687240
    Abstract: This invention obtains a high-quality output image in which a jaggy or a disconnection of a thin line hardly stands out. An edge detection unit detects whether the pixel of interest is an edge pixel or a non-edge pixel. A screen processing unit performs screen processing for the pixel of interest to determine the output value of the N-level tone. A calculation unit performs filtering processing having a preset visual sense characteristic for an area including the pixel of interest to calculate the target value of the pixel of interest, and corrects the value of the pixel of interest so as to come close to the target value, thereby determining the output value of the N-level tone. The selector selects, according to the detection result by the edge detection unit, either the result from the calculation unit or that from the screen processing unit.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: April 1, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Fukamachi, Hideki Kubo, Atsushi Ushiroda
  • Patent number: 8665487
    Abstract: Various systems, methods, and programs embodied in computer readable media are provided for calibration of at least one half-tone density in a printer. In one approach, a method is provided comprising the steps of acquiring a plurality of half-tone density values from a respective plurality of test patches generated on a belt in the printer over a period of time, each of the test patches embodying an intended half-tone density, generating a mathematically smoothed half-tone density value from the half-tone density values, and calibrating a half-tone density in the printer based upon the mathematically smoothed half-tone density value.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: March 4, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Dennis A. Abramsohn
  • Patent number: 8659630
    Abstract: An embodiment of the image processing apparatus for controlling the lighting of a line head that is driven with binary data and performs exposure with subline lighting to thereby form images, includes: a subline generating unit that generates a plurality of sublines from a same image data; an inclination correcting unit that exposes the generated sublines so as to generate correction image data used to correct an inclination of an exposure position; a gradation control unit that controls the lighting of sublines based on the correction image data generated by the inclination correcting unit to express gradation; and a light intensity correction unit that corrects and controls the light intensity based on the correction image data generated by the inclination correcting unit, wherein an output of the gradation control unit and an output of the light intensity correction unit are input into the line head in parallel.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: February 25, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Kunihiro Komai, Izumi Kinoshita, Tatsuya Miyadera, Yoshinori Shirasaki, Takuhei Yokoyama, Takeshi Shikama, Akinori Yamaguchi
  • Patent number: 8654170
    Abstract: An optical device includes a drive unit configured to drive a light source that outputs a laser beam; a detecting unit configured to detect the laser beam output from the light source; a converting unit configured to convert an output of the detecting unit into a value within a predetermined range; and a control unit configured to control the drive unit to switch a light quantity of the laser beam output from the light source from a first light quantity within an imaging light quantity range for forming an image to a second light quantity outside the imaging light quantity range, or vice versa. The converting unit converts an upper limit light quantity in the imaging light quantity range into a maximum value in the predetermined range, and converts a lower limit light quantity in the imaging light quantity range into a minimum value in the predetermined range.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: February 18, 2014
    Assignee: Ricoh Company, Limited
    Inventor: Hidetoshi Yamashita
  • Patent number: 8625163
    Abstract: A dither matrix selecting device includes a storage unit, a determining unit, and a selecting unit. The storage unit is configured to store a first dither matrix and a second dither matrix different from the first dither matrix. The first dither matrix includes a plurality of sub-matrices. Each sub-matrix of the first dither matrix has a plurality of threshold values such that a single dot grows from a starting pixel as an input value increases. Each sub-matrix has a first region and a second region different from the first region. Each threshold value allocated in the first region is smaller than a prescribed value. An arrangement of each threshold value in the first region is identical for all of the plurality of sub-matrices. The determining unit is configured to determine whether or not toner accommodated in a printing device is a specified toner. The selecting unit is configured to select the first dither matrix when the determining unit determines that the toner is not the specified toner.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: January 7, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Takuya Shimahashi
  • Patent number: 8619109
    Abstract: Methods are provided to image patterns on a media. A pitch of a repeating pattern of sub-regions is determined and an imaging head is operated which has an array of individually addressable channels to direct imaging beams to form an image swath on the media. The individually addressable channels are controlled to image the repeating pattern of features and the pitch of the repeating pattern of features is adjusted to equal substantially the pitch of the repeating patterns of sub-regions.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: December 31, 2013
    Assignee: Kodak Graphic Communications Canada Company
    Inventor: Greg Peregrym
  • Patent number: 8610956
    Abstract: An image processing method generates a halftone image by forming a halftone dot represented by a set of one or plural output dots corresponding to an intensity of an input image signal while making a part of the dots constituting the halftone dot to be an actual non-output dot so as to reduce an amount of a coloring material of a halftone-dot portion. The image processing method includes holding in a predetermined storage medium halftone-dot profile data for forming the halftone dot corresponding to the intensity of the image signal and gap-size profile data representing a size of a set of the non-output dot; and generating the halftone dot comprising a gap having a size based on the gap-size profile data, a size of the halftone dot being based on the halftone-dot profile data.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: December 17, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshifumi Takebe, Akira Ishii
  • Patent number: 8576451
    Abstract: As set forth herein, computer-implemented methods and systems facilitate the generation of halftone screens for moiré-free color halftoning. A first fundamental frequency vector and a second fundamental frequency vector of a halftone cell are sheared using a selected shearing value. The shearing value is selected as an offset in a fast scanning or slow scanning direction. The selected shearing value satisfies various moiré-free conditions associated with the identified frequency vectors and is capable of being selected for multiple halftone screens. The halftone screens generated using the sheared frequency vectors are used for moiré-free halftoning.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: November 5, 2013
    Assignee: Xerox Corporation
    Inventors: Shen-Ge Wang, Zhigang Fan, Robert Paul Loce
  • Patent number: 8482801
    Abstract: A method and system for processing image data in an image processing device for a plurality of pixel positions within a plurality of scanlines. The method and system includes storing a starting stamp value and a plurality of delta stamp values for the scanline. The stored values being used to generate a pixel stamp value for an input pixel in the scanline, by adding a starting value or previous pixel stamp value and the stored delta stamp value for the input pixel. Further includes receiving an input pixel intensity value for the input pixel and determining an output pixel intensity value. Subsequently, if the output pixel intensity value for the input pixel is equal to a value for a dot or hole the delta stamp values for at least one pixel having a location previous or subsequent to the input pixel can be updated.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: July 9, 2013
    Assignee: Xerox Corporation
    Inventors: David Allen Mantell, John Adam Handwork, David Metcalfe
  • Patent number: 8467101
    Abstract: An image forming device includes a density detector that detects image density, and a memory that stores information relating image density to dot size. When a dot size is specified, the image forming device automatically obtains the corresponding image density from the information in the memory, prints a test pattern, compares its density with the density corresponding to the specified dot size, and adjusts an image forming parameter until the density corresponding to the specified dot size is obtained. Dot size can be accurately adjusted in this way without the need for elaborate measuring equipment. In particular, the size of dots used to embed invisible information in images can be accurately controlled.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: June 18, 2013
    Assignee: Oki Data Corporation
    Inventor: Yasuhisa Sugiyama
  • Patent number: 8437046
    Abstract: This presents an image processing apparatus and an image processing method which print and output image data subjected to halftone processing with an appropriate density characteristic. The image processing apparatus generates a halftone image from a multi-value image using a threshold value arrangement, and generates a difference image between the generated halftone image and a second halftone image having the density characteristic different from that of the generated halftone image. The image processing apparatus stores the generated halftone image and the generated difference image.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: May 7, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masahito Yamazaki
  • Patent number: 8427706
    Abstract: Embodiments of the present invention provide techniques and configurations for error diffusion halftoning of an image including receiving a signal that indicates selection of a first implementation or a second implementation of determining a threshold perturbation value for error diffusion halftoning of an image, and determining the threshold perturbation value using a table of programmable values according to the selected one of the first implementation or the second implementation, wherein the second implementation provides fewer threshold perturbation values for a larger region of the image than the first implementation. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: April 23, 2013
    Assignee: Marvell International Ltd.
    Inventors: Douglas G. Kiethley, Randall D. Briggs
  • Patent number: 8422079
    Abstract: It is determined whether the pixel of interest in image data to be processed belongs to area 1 not close to a scan line changing point where a scan line changing process is done (S101). If the pixel of interest belongs to area 1, an error diffusion process is performed using an error diffusion matrix for area 1 (S102). If the pixel of interest belongs to area 2 close to the scan line changing point, the error diffusion process is performing using an error diffusion matrix for downward scan line changing for area 2 when the scan line changing process is changing to a lower line, or an error diffusion matrix for upward scan line changing for area 2 when the scan line changing process is changing to an upper line.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: April 16, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuyuki Nakamura