Patents by Inventor Takao Hirahara
Takao Hirahara 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).
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Publication number: 20170098018Abstract: An information processing method includes: acquiring, by a computer, three-dimensional data in which a value that varies based on an elapsed time from a start of a simulation is arranged; acquiring a value of a cross section of the three-dimensional data at each of the elapsed time; arranging the values of the cross section in chronological order in three-dimensional spacetime; and displaying arranged values as a three-dimensional image.Type: ApplicationFiled: September 27, 2016Publication date: April 6, 2017Applicant: FUJITSU LIMITEDInventors: MASAHIRO WATANABE, Takao Hirahara
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Publication number: 20160196683Abstract: A memory stores vector data indicative of a vector at each of a plurality of positions on a model. A processor calculates a plurality of points on the model which are arranged spirally. When the processor displays a plurality of objects corresponding to a plurality of vectors indicated in the vector data, the processor changes display positions of at least part of the plurality of objects from positions indicated in the vector data on the basis of the plurality of points calculated.Type: ApplicationFiled: November 18, 2015Publication date: July 7, 2016Applicant: FUJITSU LIMITEDInventors: Takao Hirahara, MASAHIRO WATANABE
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Publication number: 20160035131Abstract: An image processing device includes a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute: extracting, with a data storage unit configured to store data on a set of three-dimensional polygons disposed in a three-dimensional virtual space, from the three-dimensional polygons stored in the data storage unit, the extracting a three-dimensional polygon disposed on an outer side of the set of three-dimensional polygons; and drawing the extracted three-dimensional polygon.Type: ApplicationFiled: June 17, 2015Publication date: February 4, 2016Inventors: Takao Hirahara, Masahiro Watanabe
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Patent number: 8897587Abstract: The disclosed method includes: carrying out scale conversion for a first pixel value of each of a plurality of pixels included in an image to generate a second pixel value of the plurality of pixels; applying a reaction-diffusion equation including a diffusion element and a reaction element that is set according to at least the number of types of regions to be extracted, to the second pixel value of each of plural pixels within a certain region of the image a predetermined number of times to generate a third pixel value of each of the plurality of pixels included in the image; and carrying out scale inverse-conversion that is inverse-conversion of the scale conversion, for the third pixel value of each of the plurality of pixels included in the image to generate a fourth pixel value of the plurality of pixels.Type: GrantFiled: May 3, 2012Date of Patent: November 25, 2014Assignees: Fujitsu Limited, The University of TokyoInventors: Masahiro Watanabe, Takao Hirahara, Toshiaki Hisada, Seiryo Sugiura, Takumi Washio, Jun-ichi Okada
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Publication number: 20130069971Abstract: The disclosed method includes: classifying plural particles in a diffusion field into plural groups, based on data of positions and velocities of the plural particles, so that particles between which a distance is equal to or less than a predetermined distance and of which an absolute value of a difference between velocity vectors is equal to or less than a predetermined value among the plural particles are classified to a same group; first generating, for each of the plural groups, group display data for particles belonging to the group; and second generating display data by attaching the generated group display data to particle display data for displaying the particles belonging to the group.Type: ApplicationFiled: September 10, 2012Publication date: March 21, 2013Applicant: FUJITSU LIMITEDInventors: Takao HIRAHARA, Masahiro WATANABE
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Publication number: 20120301053Abstract: The disclosed method includes: carrying out scale conversion for a first pixel value of each of a plurality of pixels included in an image to generate a second pixel value of the plurality of pixels; applying a reaction-diffusion equation including a diffusion element and a reaction element that is set according to at least the number of types of regions to be extracted, to the second pixel value of each of plural pixels within a certain region of the image a predetermined number of times to generate a third pixel value of each of the plurality of pixels included in the image; and carrying out scale inverse-conversion that is inverse-conversion of the scale conversion, for the third pixel value of each of the plurality of pixels included in the image to generate a fourth pixel value of the plurality of pixels.Type: ApplicationFiled: May 3, 2012Publication date: November 29, 2012Applicants: The University of Tokyo, Fujitsu LimitedInventors: Masahiro WATANABE, Takao HIRAHARA, Toshiaki HISADA, Seiryo SUGIURA, Takumi WASHIO, Jun-ichi OKADA
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Patent number: 7362524Abstract: A magnetic pattern transfer method is disclosed. A magnetic pattern transfer master having a plurality of magnetic portions preformed with predetermined magnetic patterns is brought in proximity to a magnetic recording medium having a magnetic film to record the magnetic information, and a magnetic field is applied from an external source thereby to transfer the magnetic patterns to the magnetic recording medium. In order to improve the closeness between the magnetic film of the magnetic recording medium and the magnetic portions of the magnetic pattern transfer master, the magnetic patterns are transferred to the magnetic film of the magnetic recording medium during the process of fabricating the magnetic recording medium.Type: GrantFiled: April 25, 2005Date of Patent: April 22, 2008Assignee: Fujitsu LimitedInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara, Arata Ejiri
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Patent number: 7115328Abstract: The present invention provides a master disk that can easily be brought into contact with and separated from a magnetic recording medium, and can accommodate foreign matters. This master disk transfers a predetermined magnetic pattern onto a magnetic recording medium that can record magnetic information. In the master disk, there are a magnetic pattern formation region in which the magnetic pattern is formed, and a blank region in which the magnetic pattern is not formed. A concave portion for accommodating foreign matters is formed in at least one part of the blank region.Type: GrantFiled: April 19, 2002Date of Patent: October 3, 2006Assignee: Fujitsu LimitedInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Patent number: 7099094Abstract: A method for manufacturing a master used for a magnetic transfer, the method including the following steps: A first-master manufacturing step of manufacturing a first master including a predetermined magnetic pattern based on magnetic information; a magnetic-pattern transferring step of transferring the magnetic pattern to a magnetic recording medium by using the first master; an error confirming step of confirming an amount of a transfer error between the magnetic pattern transferred to the magnetic recording medium and the predetermined magnetic pattern; and a second-master manufacturing step of manufacturing a second master as an authentic master based on a correction magnetic pattern so formed as to offset the amount of the transfer error.Type: GrantFiled: July 11, 2005Date of Patent: August 29, 2006Assignee: Fujitsu LimitedInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Patent number: 7012775Abstract: A writer for head positioning information, or a so-called servo track writer allows the read gap to follow a track which has been established on a recording medium or disk. As long as the read gap keeps following the existing track, the write gap is allowed to move along a path extending in parallel with the existing track. The write gap is utilized to write head positioning or servo information into the recording medium along the path. Even when the recording medium suffers from vibration or the like, the read gap can follow the track. The head positioning information can thus be written into the recording medium so as to establish a head positioning pattern at a higher positional accuracy.Type: GrantFiled: October 5, 2001Date of Patent: March 14, 2006Assignee: Fujitsu LimitedInventors: Hiroyuki Suzuki, Hitoshi Komoriya, Yutaka Nakamura, Takao Hirahara
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Patent number: 6977785Abstract: A magnetic-pattern transferring method is a method for transferring a magnetic pattern to a magnetic recording medium. The method comprises steps as follows. In a master transferring step, a magnetic field is applied to a master placed close to the magnetic recording medium. The magnetic field excites a magnetic layer having a pattern patterned on the master according to the magnetic pattern. Thereby, the pattern of the magnetic layer is transferred to the magnetic recording medium. In a pattern-difference measuring step, a magnetic condition of the magnetic recording medium is measured so as to measure a magnetically different part between the pattern transferred to the magnetic recording medium and the magnetic pattern. In a magnetic transferring step, a pattern transfer is performed to the magnetic recording medium by using the master while applying the magnetic field so as to correct a magnetic condition of the magnetically different part.Type: GrantFiled: March 27, 2002Date of Patent: December 20, 2005Assignee: Fujitsu LimitedInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Publication number: 20050248865Abstract: A magnetic-pattern transferring method is a method for transferring a magnetic pattern to a magnetic recording medium. The method comprises steps as follows. In a master transferring step, a magnetic field is applied to a master placed close to the magnetic recording medium. The magnetic field excites a magnetic layer having a pattern patterned on the master according to the magnetic pattern. Thereby, the pattern of the magnetic layer is transferred to the magnetic recording medium. In a pattern-difference measuring step, a magnetic condition of the magnetic recording medium is measured so as to measure a magnetically different part between the pattern transferred to the magnetic recording medium and the magnetic pattern. In a magnetic transferring step, a pattern transfer is performed to the magnetic recording medium by using the master while applying the magnetic field so as to correct a magnetic condition of the magnetically different part.Type: ApplicationFiled: July 11, 2005Publication date: November 10, 2005Applicant: Fujitsu LimitedInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Publication number: 20050248866Abstract: A magnetic-pattern transferring method is a method for transferring a magnetic pattern to a magnetic recording medium. The method comprises steps as follows. In a master transferring step, a magnetic field is applied to a master placed close to the magnetic recording medium. The magnetic field excites a magnetic layer having a pattern patterned on the master according to the magnetic pattern. Thereby, the pattern of the magnetic layer is transferred to the magnetic recording medium. In a pattern-difference measuring step, a magnetic condition of the magnetic recording medium is measured so as to measure a magnetically different part between the pattern transferred to the magnetic recording medium and the magnetic pattern. In a magnetic transferring step, a pattern transfer is performed to the magnetic recording medium by using the master while applying the magnetic field so as to correct a magnetic condition of the magnetically different part.Type: ApplicationFiled: July 11, 2005Publication date: November 10, 2005Applicant: Fujitsu LimitedInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Patent number: 6950254Abstract: A magnetic transfer apparatus is utilized to establish magnetization on the surface of a magnetic disk. A support mechanism supports the magnetic disk in the magnetic transfer apparatus. A magnetizing mechanism is designed to get opposed to the magnetic disk held by the support mechanism. The magnetizing mechanism applies a magnetic field of variable intensity in response to a change of position in the radial direction of the magnetic disk. The magnetic transfer apparatus enables establishment of a magnetic field of an appropriate intensity at any positions in the radial direction of the magnetic disk. Magnetization of a constant intensity can be established over the surface of the magnetic disk irrespective of a position in the radial direction of the magnetic disk. The magnetic transfer apparatus alone serves to establish a servo pattern of a clear magnetization on the magnetic disk.Type: GrantFiled: August 4, 2003Date of Patent: September 27, 2005Assignee: Fujitsu LimitedInventors: Hiroyuki Suzuki, Hitoshi Komoriya, Yutaka Nakamura, Takao Hirahara
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Publication number: 20050185311Abstract: A magnetic pattern transfer method is disclosed. A magnetic pattern transfer master having a plurality of magnetic portions preformed with predetermined magnetic patterns is brought in proximity to a magnetic recording medium having a magnetic film to record the magnetic information, and a magnetic field is applied from an external source thereby to transfer the magnetic patterns to the magnetic recording medium. In order to improve the closeness between the magnetic film of the magnetic recording medium and the magnetic portions of the magnetic pattern transfer master, the magnetic patterns are transferred to the magnetic film of the magnetic recording medium during the process of fabricating the magnetic recording medium.Type: ApplicationFiled: April 25, 2005Publication date: August 25, 2005Applicant: FUJITSU LIMITEDInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara, Arata Ejiri
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Publication number: 20040027708Abstract: A magnetic transfer apparatus is utilized to establish magnetization on the surface of a magnetic disk. A support mechanism supports the magnetic disk in the magnetic transfer apparatus. A magnetizing mechanism is designed to get opposed to the magnetic disk held by the support mechanism. The magnetizing mechanism applies a magnetic field of variable intensity in response to a change of position in the radial direction of the magnetic disk. The magnetic transfer apparatus enables establishment of a magnetic field of an appropriate intensity at any positions in the radial direction of the magnetic disk. Magnetization of a constant intensity can be established over the surface of the magnetic disk irrespective of a position in the radial direction of the magnetic disk. The magnetic transfer apparatus alone serves to establish a servo pattern of a clear magnetization on the magnetic disk.Type: ApplicationFiled: August 4, 2003Publication date: February 12, 2004Applicant: FUJITSU LIMITEDInventors: Hiroyuki Suzuki, Hitoshi Komoriya, Yutaka Nakamura, Takao Hirahara
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Patent number: 6655244Abstract: A centering apparatus for centering a disk about a center member such as a shaft or hub includes a plurality of pairs of actuator units. The actuator units of each of the pairs faces each other through the disk. Each of the actuator units has a member which moves linearly and can come into contact with the disk.Type: GrantFiled: June 18, 1999Date of Patent: December 2, 2003Assignee: Fujitsu LimitedInventors: Mitsuru Shiraishi, Koichi Oikawa, Hitoshi Komoriya, Yutaka Nakamura, Takao Hirahara
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Publication number: 20030113503Abstract: The present invention provides a master disk that can easily be brought into contact with and separated from a magnetic recording medium, and can accommodate foreign matters. This master disk transfers a predetermined magnetic pattern onto a magnetic recording medium that can record magnetic information. In the master disk, there are a magnetic pattern formation region in which the magnetic pattern is formed, and a blank region in which the magnetic pattern is not formed. A concave portion for accommodating foreign matters is formed in at least one part of the blank region.Type: ApplicationFiled: April 19, 2002Publication date: June 19, 2003Applicant: FUJITSU LIMITEDInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Publication number: 20030043486Abstract: A magnetic-pattern transferring method is a method for transferring a magnetic pattern to a magnetic recording medium. The method comprises steps as follows. In a master transferring step, a magnetic field is applied to a master placed close to the magnetic recording medium. The magnetic field excites a magnetic layer having a pattern patterned on the master according to the magnetic pattern. Thereby, the pattern of the magnetic layer is transferred to the magnetic recording medium. In a pattern-difference measuring step, a magnetic condition of the magnetic recording medium is measured so as to measure a magnetically different part between the pattern transferred to the magnetic recording medium and the magnetic pattern. In a magnetic transferring step, a pattern transfer is performed to the magnetic recording medium by using the master while applying the magnetic field so as to correct a magnetic condition of the magnetically different part.Type: ApplicationFiled: March 27, 2002Publication date: March 6, 2003Applicant: FUJITSU LIMITEDInventors: Yutaka Nakamura, Hitoshi Komoriya, Hiroyuki Suzuki, Takao Hirahara
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Publication number: 20030021051Abstract: A writer for head positioning information, or a so-called servo track writer allows the read gap to follow a track which has been established on a recording medium or disk. As long as the read gap keeps following the existing track, the write gap is allowed to move along a path extending in parallel with the existing track. The write gap is utilized to write head positioning or servo information into the recording medium along the path. Even when the recording medium suffers from vibration or the like, the read gap can follow the track. The head positioning information can thus be written into the recording medium so as to establish a head positioning pattern at a higher positional accuracy.Type: ApplicationFiled: October 5, 2001Publication date: January 30, 2003Applicant: FUJITSU LIMITEDInventors: Hiroyuki Suzuki, Hitoshi Komoriya, Yutaka Nakamura, Takao Hirahara