Patents by Inventor Tsai-Ling KAO
Tsai-Ling KAO 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: 12196542Abstract: A calibration method of three-dimensional measurement system includes a projection device, a camera and a processor. The projection device projects structural light to a reference object including a first calibration surface and a second calibration surface. The camera photographs the reference object to obtain at least one reference object image. The processor performs decoding according to the at least one reference object image to obtain a plurality of pieces of phase data of the at least one reference object image. The processor computes a first phase corresponding to the first calibration surface and a second phase corresponding to the second calibration surface according to the phase data, calculates a surface phase difference between the first phase and the second phase, and computes according to the surface phase difference and a height of the second calibration surface relative to the first calibration surface to obtain a phase-height conversion parameter.Type: GrantFiled: May 13, 2022Date of Patent: January 14, 2025Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jhe-Ruei Li, Wei-Shiang Huang, Tsai-Ling Kao, Chun-Yi Lee
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Publication number: 20240153068Abstract: A non-contact detection method for a nut is provided. The method includes the following steps. The nut is photographed to obtain a threaded hole image of the nut. A thread area comparison between the threaded hole image and a standard threaded hole image is performed. An area difference is obtained according to the result of the thread area comparison. Whether the nut is a good nut is determined according to the area difference.Type: ApplicationFiled: January 6, 2023Publication date: May 9, 2024Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Wei-Shiang HUANG, Tsai-Ling KAO, Chun-Yi LEE, Jhe-Ruei LI
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Publication number: 20230184541Abstract: A calibration method of three-dimensional measurement system includes a projection device, a camera and a processor. The projection device projects structural light to a reference object including a first calibration surface and a second calibration surface. The camera photographs the reference object to obtain at least one reference object image. The processor performs decoding according to the at least one reference object image to obtain a plurality of pieces of phase data of the at least one reference object image. The processor computes a first phase corresponding to the first calibration surface and a second phase corresponding to the second calibration surface according to the phase data, calculates a surface phase difference between the first phase and the second phase, and computes according to the surface phase difference and a height of the second calibration surface relative to the first calibration surface to obtain a phase-height conversion parameter.Type: ApplicationFiled: May 13, 2022Publication date: June 15, 2023Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jhe-Ruei LI, Wei-Shiang HUANG, Tsai-Ling KAO, Chun-Yi LEE
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Patent number: 11615608Abstract: An image obtaining method comprises: by a projecting device, separately projecting an image acquisition light and a reference light onto a target object, wherein the light intensity of the image acquisition light is higher than the light intensity of the reference light; by an image obtaining device, obtaining a first image and a second image, both the first image and the second image comprising the image of the target object, with the target object of the first image being illuminated by the image acquisition light, and the target object of the second image being illuminated by the reference light, wherein the first image has a first area including a part of the target object, and the second image has a second area including the part of the target object; and by a computing device, performing a difference evaluation procedure to obtain a required light intensity based on a required amount.Type: GrantFiled: April 29, 2021Date of Patent: March 28, 2023Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsai-Ling Kao, Kai-Shiang Gan, Hian-Kun Tenn, Wei-Shiang Huang
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Patent number: 11524406Abstract: A calibration method for a robotic arm system is provided. The method includes: capturing an image of a calibration object fixed to a front end of the robotic arm by a visual device, wherein a pedestal of the robotic arm has a pedestal coordinate system, and the front end of the robotic arm has a first relative relationship with the pedestal, the front end of the robotic arm has a second relative relationship with the calibration object; receiving the image and obtaining three-dimensional feature data of the calibration object according to the image by a computing device; and computing a third relative relationship between the visual device and the pedestal according to the three-dimensional feature data, the first relative relationship, and the second relative relationship to calibrate a position error between a physical location of the calibration object and a predictive positioning-location generated by the visual device.Type: GrantFiled: July 19, 2019Date of Patent: December 13, 2022Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Jay Huang, Yu-Chun Cheng, Hian-Kun Tenn, Tsai-Ling Kao
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Publication number: 20220207283Abstract: An image obtaining method comprises: by a projecting device, separately projecting an image acquisition light and a reference light onto a target object, wherein the light intensity of the image acquisition light is higher than the light intensity of the reference light; by an image obtaining device, obtaining a first image and a second image, both the first image and the second image comprising the image of the target object, with the target object of the first image being illuminated by the image acquisition light, and the target object of the second image being illuminated by the reference light, wherein the first image has a first area including a part of the target object, and the second image has a second area including the part of the target object; and by a computing device, performing a difference evaluation procedure to obtain a required light intensity based on a required amount.Type: ApplicationFiled: April 29, 2021Publication date: June 30, 2022Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Tsai-Ling KAO, Kai-Shiang GAN, Hian-Kun TENN, Wei-Shiang HUANG
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Patent number: 11120545Abstract: A method for measuring a hole provided in a workpiece is provided and the method comprises: obtaining a three-dimensional point cloud model of the workpiece and a two-dimensional image of the workpiece, defining a first contour in the three-dimensional point cloud model based on an intensity difference of the two-dimensional image, defining a second contour and a third contour respectively based in the first contour, bounding a data point testing region between the second contour and the third contour, respectively defining data point sampling regions along a plurality of cross-section directions of the data point testing region, respectively sampling data points in the data point sampling regions to obtain a turning point set comprising turning points, wherein each of the turning points has the largest turning margin, connecting the turning points which are distributed in the turning point set along a ring direction to obtain an edge of the hole.Type: GrantFiled: April 1, 2020Date of Patent: September 14, 2021Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chun-Yi Lee, Tsai-Ling Kao, Hian-Kun Tenn
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Publication number: 20210192705Abstract: A method for measuring a hole provided in a workpiece is provided and the method comprises: obtaining a three-dimensional point cloud model of the workpiece and a two-dimensional image of the workpiece, defining a first contour in the three-dimensional point cloud model based on an intensity difference of the two-dimensional image, defining a second contour and a third contour respectively based in the first contour, bounding a data point testing region between the second contour and the third contour, respectively defining data point sampling regions along a plurality of cross-section directions of the data point testing region, respectively sampling data points in the data point sampling regions to obtain a turning point set comprising turning points, wherein each of the turning points has the largest turning margin, connecting the turning points which are distributed in the turning point set along a ring direction to obtain an edge of the hole.Type: ApplicationFiled: April 1, 2020Publication date: June 24, 2021Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chun-Yi LEE, Tsai-Ling KAO, Hian-Kun TENN
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Publication number: 20200156251Abstract: A calibration method for a robotic arm system is provided. The method includes: capturing an image of a calibration object fixed to a front end of the robotic arm by a visual device, wherein a pedestal of the robotic arm has a pedestal coordinate system, and the front end of the robotic arm has a first relative relationship with the pedestal, the front end of the robotic arm has a second relative relationship with the calibration object; receiving the image and obtaining three-dimensional feature data of the calibration object according to the image by a computing device; and computing a third relative relationship between the visual device and the pedestal according to the three-dimensional feature data, the first relative relationship, and the second relative relationship to calibrate a position error between a physical location of the calibration object and a predictive positioning-location generated by the visual device.Type: ApplicationFiled: July 19, 2019Publication date: May 21, 2020Inventors: Jay HUANG, Yu-Chun CHENG, Hian-Kun TENN, Tsai-Ling KAO