Patents by Inventor Yoshitaka Fujisawa
Yoshitaka Fujisawa 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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Patent number: 9710904Abstract: An inspection apparatus capable of preventing a conforming article from being judged as nonconforming when inspecting a molded object for acceptability by performing image processing on an image captured of the inspection object. The apparatus includes a means for positioning a model pattern in a position with a highest degree of agreement by matching the model pattern against the image captured of the inspection object, a model pattern dividing means for dividing the model pattern into a plurality of elements in such a manner as to have mutually overlapping regions, and a shape recognition means for recognizing a shape corresponding to the model pattern by positioning each of the elements divided by the model pattern dividing means in a position with a highest degree of agreement by performing pattern matching within a predetermined range with reference to the position where the model pattern has been positioned on the image.Type: GrantFiled: April 25, 2014Date of Patent: July 18, 2017Assignee: BRIDGESTONE CORPORATIONInventor: Yoshitaka Fujisawa
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Publication number: 20160086320Abstract: An inspection apparatus capable of preventing a conforming article from being judged as nonconforming when inspecting a molded object for acceptability by performing image processing on an image captured of the inspection object. The apparatus includes a means for positioning a model pattern in a position with a highest degree of agreement by matching the model pattern against the image captured of the inspection object, a model pattern dividing means for dividing the model pattern into a plurality of elements in such a manner as to have mutually overlapping regions, and a shape recognition means for recognizing a shape corresponding to the model pattern by positioning each of the elements divided by the model pattern dividing means in a position with a highest degree of agreement by performing pattern matching within a predetermined range with reference to the position where the model pattern has been positioned on the image.Type: ApplicationFiled: April 25, 2014Publication date: March 24, 2016Inventor: Yoshitaka FUJISAWA
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Patent number: 8618924Abstract: A tire inspection apparatus arranged with a plurality of cameras located at relatively displaced circumferential positions and set for the respective shooting positions different from each other in the axial direction of the tire. Thus the images of the inner circumferential surface of the tire are shot by the plurality of cameras as the tire is rotated circumferentially relative to the plurality of cameras. During this operation, markers are inserted at the same time in the images shot by all of the cameras. The images are synthesized using these markers as reference positions in aligning the shot images in accordance with the relative displacements of the cameras in the circumferential direction.Type: GrantFiled: May 13, 2010Date of Patent: December 31, 2013Assignee: Kabushiki Kaisha BridgestoneInventor: Yoshitaka Fujisawa
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Patent number: 8305436Abstract: A separation filter selection device provided with an image input unit, a memory unit, a setting unit, an evaluation unit and a separation filter selection unit is disclosed. The image input unit inputs a captured image capturing a tire surface including a characteristic portion thereof. The memory unit stores plural filters for performing image processing of the captured image, stores a training image in which the characteristic portion is separated from the captured image, and a weighted image in which a weighting is set to a predetermined region of the captured image. The setting unit combines two or more filters out of the plural filters and sets a separation filter. The evaluation unit derives an evaluation value of the separation filter on the basis of an image in which a differential between the processed image that has been processed by each of the filters of the separation filter, and the training image, and to which a weighting based on the weighted image is applied.Type: GrantFiled: October 19, 2007Date of Patent: November 6, 2012Assignee: Bridgestone CorporationInventors: Yoshitaka Fujisawa, Tomohiro Mizuno, Akinobu Mizutani, Akira Togii, Hirotaka Iino
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Patent number: 8175819Abstract: A tire inspection device generates an analyzing wavelet for wavelet transformation correlating time, corresponding to tire surface position, and frequency, based on a frequency representing a characteristic portion of a predetermined tire surface structure. After this, the tire inspection device generates and stores an integer numeric filter from the created analyzing wavelet, detects the tire surface structure, carries out wavelet transformation on a signal obtained by the detection by using the numeric filter as the analyzing wavelet, and outputs the transformation result as the characteristic information representing the characteristic portion.Type: GrantFiled: June 13, 2007Date of Patent: May 8, 2012Assignee: Bridgestone CorporationInventor: Yoshitaka Fujisawa
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Publication number: 20120092149Abstract: A inspection apparatus arranged with a plurality of cameras located at relatively displaced circumferential positions and set for the respective shooting positions different from each other in the axial direction of the tire. Thus the images of the inner circumferential surface of the tire are shot by the plurality of cameras as the tire is rotated circumferentially relative to the plurality of cameras. During this operation, markers are inserted at the same time in the images shot by all of the cameras. The images are synthesized using these markers as reference positions in aligning the shot images in accordance with the relative displacements of the cameras in the circumferential direction.Type: ApplicationFiled: May 13, 2010Publication date: April 19, 2012Applicant: KABUSHIKI KAISHA BRIDGESTONEInventor: Yoshitaka Fujisawa
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Publication number: 20100026799Abstract: A separation filter selection device provided with an image input unit, a memory unit, a setting unit, an evaluation unit and a separation filter selection unit is disclosed. The image input unit inputs a captured image capturing a tire surface including a characteristic portion thereof. The memory unit stores plural filters for performing image processing of the captured image, stores a training image in which the characteristic portion is separated from the captured image, and a weighted image in which a weighting is set to a predetermined region of the captured image. The setting unit combines two or more filters out of the plural filters and sets a separation filter. The evaluation unit derives an evaluation value of the separation filter on the basis of an image in which a differential between the processed image that has been processed by each of the filters of the separation filter, and the training image, and to which a weighting based on the weighted image is applied.Type: ApplicationFiled: October 19, 2007Publication date: February 4, 2010Applicant: BRIDGESTONE CORPORATIONInventors: Yoshitaka Fujisawa, Tomohiro Mizuno, Akinobu Mizutani, Akira Togii, Hirotaka Iino
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Publication number: 20090281738Abstract: A tire inspection device generates an analyzing wavelet for wavelet transformation correlating time, corresponding to tire surface position, and frequency, based on a frequency representing a characteristic portion of a predetermined tire surface structure. After this, the tire inspection device generates and stores an integer numeric filter from the created analyzing wavelet, detects the tire surface structure, carries out wavelet transformation on a signal obtained by the detection by using the numeric filter as the analyzing wavelet, and outputs the transformation result as the characteristic information representing the characteristic portion.Type: ApplicationFiled: June 13, 2007Publication date: November 12, 2009Applicant: BRIDGESTONE CORPORATIONInventor: Yoshitaka Fujisawa
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Patent number: 7343789Abstract: There are provided an inspection method of tire uneven marks capable of judging defect of three-dimensional form of the mark in a higher reliability without depending on a brightness distribution image of unevenness, and an inspection apparatus of tire uneven marks.Type: GrantFiled: May 18, 2005Date of Patent: March 18, 2008Assignee: Bridgestone CorporationInventors: Yoshitaka Fujisawa, Tomoyuki Kaneko
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Publication number: 20070209431Abstract: There are provided an inspection method of tire uneven marks capable of judging defect of three-dimensional form of the mark in a higher reliability without depending on a brightness distribution image of unevenness, and an inspection apparatus of tire uneven marks.Type: ApplicationFiled: May 18, 2005Publication date: September 13, 2007Applicant: BRIDGESTONE CORPORATIONInventors: Yoshitaka Fujisawa, Tomoyuki Kaneko