Patents by Inventor Toshiaki Kakutani

Toshiaki Kakutani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10798266
    Abstract: A plurality of halftone processing units are provided for processing each of a plurality of pieces of image data corresponding to a plurality of divided images to generate dot data representing presence or absence of dot formation. At least two halftone processing units simultaneously perform at least a part of halftone processing for at least two pieces of image data. In the halftone processing, complex error diffusion method processing of matching at least a part of dot data obtained by performing halftone processing using an error diffusion method for an error diffused gradation value of each pixel of a divided image with a determination result of a dither method, is performed.
    Type: Grant
    Filed: August 20, 2019
    Date of Patent: October 6, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Patent number: 10755152
    Abstract: An image forming system that classifies a block formed by Nb pixels included in image data into Nt groups including a group including a pixel of a highest gradation value and a group including a pixel of a lowest gradation value, generates, for at least one of the Nt groups, positional information that is information indicating positions of pixels that form the corresponding group, determines a block gradation value in accordance with a data amount that is smaller than a data amount that is used for expressing gradation values of the Nb pixels for each of the Nt groups as a target, based on a gradation value for each of pixels that form each group, tentatively determines, determines, for the block as a target, the dot arrangement using the tentatively determined dot arrangement and the positional information, and forms an image using the determined dot arrangement.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: August 25, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Patent number: 10757297
    Abstract: n (n is an integer that is equal to or greater than 2) error diffusion processing units are respectively provided to correspond to division images obtained by dividing an image into n images in a main scanning direction, and at least a part of halftone processing on two division images is performed simultaneously. When one error diffusion processing unit that processes the division image which is positioned ahead in the main scanning direction processes one of rasters up to an end portion in the main scanning direction to obtain diffusion errors that are diffused into pixels in the neighborhood of an objective pixel, the one error diffusion processing unit delivers a forward-direction diffusion error to the other error diffusion processing unit.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: August 25, 2020
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Publication number: 20200120234
    Abstract: n (n is an integer that is equal to or greater than 2) error diffusion processing units are respectively provided to correspond to division images obtained by dividing an image into n images in a main scanning direction, and at least a part of halftone processing on two division images is performed simultaneously. When one error diffusion processing unit that processes the division image which is positioned ahead in the main scanning direction processes one of rasters up to an end portion in the main scanning direction to obtain diffusion errors that are diffused into pixels in the neighborhood of an objective pixel, the one error diffusion processing unit delivers a forward-direction diffusion error to the other error diffusion processing unit.
    Type: Application
    Filed: October 11, 2019
    Publication date: April 16, 2020
    Inventor: Toshiaki KAKUTANI
  • Publication number: 20200068091
    Abstract: A plurality of halftone processing units are provided for processing each of a plurality of pieces of image data corresponding to a plurality of divided images to generate dot data representing presence or absence of dot formation. At least two halftone processing units simultaneously perform at least a part of halftone processing for at least two pieces of image data. In the halftone processing, complex error diffusion method processing of matching at least a part of dot data obtained by performing halftone processing using an error diffusion method for an error diffused gradation value of each pixel of a divided image with a determination result of a dither method, is performed.
    Type: Application
    Filed: August 20, 2019
    Publication date: February 27, 2020
    Inventor: Toshiaki KAKUTANI
  • Patent number: 10462331
    Abstract: An image processing apparatus that prints an image includes a preliminary halftone processing unit configured to determine whether a preliminary dot through a dithering method is to be formed, a final halftone processing unit configured to determine whether a dot to be printed through an error diffusion method is to be formed, and a dither result application level control unit configured to control a dither result application level which is a level at which probability that the dot to be printed will be formed is raised with the final halftone processing unit when the preliminary dot is to be formed in the preliminary halftone processing unit. The dither result application level control unit reduces the dither result application level during printing in a case of copying a reflected document or a case where the image data contains many high-frequency components, compared to other instances of printing.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: October 29, 2019
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Publication number: 20190220714
    Abstract: An image processing apparatus that prints an image includes a preliminary halftone processing unit configured to determine whether a preliminary dot through a dithering method is to be formed, a final halftone processing unit configured to determine whether a dot to be printed through an error diffusion method is to be formed, and a dither result application level control unit configured to control a dither result application level which is a level at which probability that the dot to be printed will be formed is raised with the final halftone processing unit when the preliminary dot is to be formed in the preliminary halftone processing unit. The dither result application level control unit reduces the dither result application level during printing in a case of copying a reflected document or a case where the image data contains many high-frequency components, compared to other instances of printing.
    Type: Application
    Filed: January 14, 2019
    Publication date: July 18, 2019
    Inventor: Toshiaki KAKUTANI
  • Publication number: 20180257391
    Abstract: A block configured with Nb pixels included in image data is classified into Nt groups, position information which is information indicating a position of the pixel configuring is created, a block gradation value is decided by a data amount smaller than a data amount required for representing gradation values of the Nb pixels based on the gradation value for each pixel configuring each group, for each of the Nt groups, dot arrangement which is information indicating the presence or absence of dot formation for each pixel configuring the block is temporarily decided based on the block gradation value, for each of the Nt groups as the target, the dot arrangement targeting the block is decided by using the temporarily decided dot arrangement and the position information, and it is determined whether or not the dot arrangement decided by the dot arrangement deciding unit is corrected by using an error diffusion method.
    Type: Application
    Filed: February 20, 2018
    Publication date: September 13, 2018
    Inventor: Toshiaki KAKUTANI
  • Publication number: 20180218246
    Abstract: An image forming system that classifies a block formed by Nb pixels included in image data into Nt groups including a group including a pixel of a highest gradation value and a group including a pixel of a lowest gradation value, generates, for at least one of the Nt groups, positional information that is information indicating positions of pixels that form the corresponding group, determines a block gradation value in accordance with a data amount that is smaller than a data amount that is used for expressing gradation values of the Nb pixels for each of the Nt groups as a target, based on a gradation value for each of pixels that form each group, tentatively determines, determines, for the block as a target, the dot arrangement using the tentatively determined dot arrangement and the positional information, and forms an image using the determined dot arrangement.
    Type: Application
    Filed: January 11, 2018
    Publication date: August 2, 2018
    Inventor: Toshiaki KAKUTANI
  • Patent number: 10016978
    Abstract: A printing apparatus has a plurality of nozzles including preceding nozzles that discharge ink onto a printing medium before ink discharge of the other nozzles, and succeeding nozzles that discharge ink onto the printing medium after the ink discharge of the preceding nozzles, and if the amount of black ink discharged on the printing target region is larger than a predetermined amount, the printing apparatus discharges a smaller amount of chromatic ink than the amount of the discharged black ink onto the printing target region from the plurality of nozzles so that the amount of the chromatic ink discharged from the succeeding nozzles is larger than the amount of the chromatic ink discharged from the preceding nozzles.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: July 10, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Patent number: 10005289
    Abstract: A printing apparatus has a plurality of nozzles capable of discharging dark ink and light ink that are of the same type color; the plurality of nozzles includes preceding nozzles that discharge the ink onto the printing medium before the ink discharge of the other nozzles, and succeeding nozzles that discharge the ink onto the printing medium after the ink discharge of the preceding nozzles, and if the amount of the dark ink discharged on the printing target region is larger than a predetermined amount, the printing apparatus discharges a smaller amount of the light ink than the amount of the discharged dark ink onto the printing target region from the plurality of nozzles so that the amount of the light ink discharged from the succeeding nozzles is larger than the amount of the light ink discharged from the preceding nozzles.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: June 26, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Publication number: 20180079220
    Abstract: A printing apparatus has a plurality of nozzles capable of discharging dark ink and light ink that are of the same type color; the plurality of nozzles includes preceding nozzles that discharge the ink onto the printing medium before the ink discharge of the other nozzles, and succeeding nozzles that discharge the ink onto the printing medium after the ink discharge of the preceding nozzles, and if the amount of the dark ink discharged on the printing target region is larger than a predetermined amount, the printing apparatus discharges a smaller amount of the light ink than the amount of the discharged dark ink onto the printing target region from the plurality of nozzles so that the amount of the light ink discharged from the succeeding nozzles is larger than the amount of the light ink discharged from the preceding nozzles.
    Type: Application
    Filed: September 5, 2017
    Publication date: March 22, 2018
    Inventor: Toshiaki KAKUTANI
  • Publication number: 20180079212
    Abstract: A printing apparatus has a plurality of nozzles including preceding nozzles that discharge ink onto a printing medium before ink discharge of the other nozzles, and succeeding nozzles that discharge ink onto the printing medium after the ink discharge of the preceding nozzles, and if the amount of black ink discharged on the printing target region is larger than a predetermined amount, the printing apparatus discharges a smaller amount of chromatic ink than the amount of the discharged black ink onto the printing target region from the plurality of nozzles so that the amount of the chromatic ink discharged from the succeeding nozzles is larger than the amount of the chromatic ink discharged from the preceding nozzles.
    Type: Application
    Filed: September 5, 2017
    Publication date: March 22, 2018
    Inventor: Toshiaki KAKUTANI
  • Patent number: 9832350
    Abstract: An image processing method includes performing first halftone processing and second halftone processing. The second halftone processing is performed, for a second kind of color in advance among a plurality of colors constituting an original image, in units of blocks each consisting of a plurality of pixels that constitute the original image and the second kind of color is converted into an amount of second kind of ink corresponding to the second kind of color among the plurality of inks. The first halftone processing is performed, for the first kind of color, for each pixel that constitutes the original image or each pixel group having a smaller number of pixels than the block and the first kind of color is converted into an amount of first kind of ink corresponding to the first kind of color among the plurality of inks.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: November 28, 2017
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Publication number: 20160295077
    Abstract: An image processing method includes performing first halftone processing and second halftone processing. The second halftone processing is performed, for a second kind of color in advance among a plurality of colors constituting an original image, in units of blocks each consisting of a plurality of pixels that constitute the original image and the second kind of color is converted into an amount of second kind of ink corresponding to the second kind of color among the plurality of inks. The first halftone processing is performed, for the first kind of color, for each pixel that constitutes the original image or each pixel group having a smaller number of pixels than the block and the first kind of color is converted into an amount of first kind of ink corresponding to the first kind of color among the plurality of inks.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 6, 2016
    Inventor: Toshiaki KAKUTANI
  • Publication number: 20160173724
    Abstract: Provided is a printing apparatus which prints by performing a halftoning process, by setting a block which is formed of a plurality of pixels as a unit, the apparatus including a first determination unit which determines whether or not a gradation value of each of the plurality of pixels satisfies a predetermined condition; a second determination unit which applies different conditions based on a determination result of the first determination unit, and determines whether or not to form a dot in at least one of the plurality of pixels; an error calculation unit which performs a calculation of a gradation error which occurs due to a determination result of the second determination unit, and a distribution of the calculated error to an unprocessed pixel by setting the block as a unit; and a dot forming unit which performs forming of dots using the determination result of the second determination unit.
    Type: Application
    Filed: December 15, 2015
    Publication date: June 16, 2016
    Inventors: Toshiaki KAKUTANI, Satoshi YAMAZAKI, Masashi KUWABARA
  • Patent number: 9247104
    Abstract: A printing apparatus includes a dot data generating section configured to: compare a first threshold which is aligned with a dither mask and a corresponding gradation value which corresponds with the image data which is input; generate the dot data by determining that dots are to be formed in a case where it is determined that the corresponding gradation value exceeds the first threshold and generate the dot data by determining the forming of dots due to application of an error diffusion method by comparing correction data, where error diffusion in the image data is complete, and a second threshold in a case where it is determined that the corresponding gradation value does not exceed the first threshold as a result of the comparing; and diffuse errors, which occur as a result of generating the dot data, to pixels in a predetermined range in the vicinity in both cases.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: January 26, 2016
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Patent number: 9202151
    Abstract: A printing apparatus is provided with a CPU. The CPU generates dot data where dots are regularly distributed and arranged in a case where gradation values which are represented by image data are a predetermined value or less by using a dither mask where thresholds are set for each printing pixel and comparing the gradation values of each of the pixels which configure the original image and the thresholds for each of the printing pixels which are set in the dither mask, and generates the dot data such that the degree of regularity of the dots which are distributed and arranged is reduced as the gradation values are increased in a case where the gradation values which are represented by the image data exceed the predetermined value through execution of a dot data generating module.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: December 1, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Patent number: 9148547
    Abstract: The printing apparatus includes a comparator, a threshold setting section, and an error diffusion section. The comparator compares a first threshold which is aligned with a dither mask and the image data. The threshold setting section sets a second threshold which is used in the error diffusion method to one of a low threshold and a high threshold according to results of the comparing, and sets the low threshold to a value which is smaller than a gradation range of the image data in at least a low gradation area when it is determined that the image data exceeds the first threshold. The error diffusion section generates the dot data and to calculate distribution to pixels in the vicinity of gradation errors by comparing correction data where error distribution in the image data is complete using the error diffusion method and the low threshold or the high threshold.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: September 29, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Toshiaki Kakutani
  • Patent number: 9132632
    Abstract: When dot data indicating whether or not a dot is to be formed is formed based on the gradation value for each pixel forming an image, dots belonging to a plurality of pixel groups are printed in a common region in an overlapping manner, and the distribution of dots formed in the common region has a noise characteristic possessing a peak in the spatial frequency region on the high-frequency side. In a case where first and second pixels belonging, respectively, to two pixel groups are proximal pixels in the common region in a predetermined gradation range in which probabilities k1 and k2 at which a dot is formed in the first and second pixels are such that k1<0.5 and k2<0.5, a probability K of a dot being formed in both of the proximal pixels is set to be close to k1┬Ěk2.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: September 15, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Toshiaki Kakutani, Takuma Hayashi