Patents by Inventor Ludovic Angot
Ludovic Angot 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: 20220364848Abstract: A depth measurement apparatus including an illumination module, a beam splitter, an objective lens, an image capture module, a controller and a processor is provided. The illumination module is configured to generate an illumination beam. The beam splitter and the objective lens are disposed on an optical path of the illumination beam, and the object lens is configured to focus the illumination beam into a hole formed in an object. The image capture module is configured to capture images of the hole at different heights. The controller is coupled to the illumination module and the image capture module. The processor is coupled to the controller and the image capture module, and configured to perform focus distance evaluations on the images captured by the image capture module to obtain a height difference between two surfaces of the object. A depth measurement method is also provided.Type: ApplicationFiled: May 13, 2021Publication date: November 17, 2022Applicant: Industrial Technology Research InstituteInventors: Ludovic Angot, Ching-Han Yang
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Patent number: 11162784Abstract: System and method for profile measurement are provided. The profile measurement system includes a light projector, an imaging device, a control system, and a processing unit. The light projector includes a light source, a mask, and an optical system. An aperture of the mask allows a portion of light to pass through and generates a pattern. The optical system includes a variable focal length lens element configured to project the pattern at different projection distances. The imaging device is configured to capture images of the pattern projected at the different projection distances. The control system is configured to control a projection distance of the light projector and a focus distance of the imaging device. The processing unit is configured to obtain in-focus pixels in the captured images, generate mask images, reconstruct a large depth of field pattern image based on the captured images and reconstruct the object profile.Type: GrantFiled: December 30, 2019Date of Patent: November 2, 2021Assignee: Industrial Technology Research InstituteInventors: Ludovic Angot, Yueh-Yi Lai
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Publication number: 20210199425Abstract: System and method for profile measurement are provided. The profile measurement system includes a light projector, an imaging device, a control system, and a processing unit. The light projector includes a light source, a mask, and an optical system. An aperture of the mask allows a portion of light to pass through and generates a pattern. The optical system includes a variable focal length lens element configured to project the pattern at different projection distances. The imaging device is configured to capture images of the pattern projected at the different projection distances. The control system is configured to control a projection distance of the light projector and a focus distance of the imaging device. The processing unit is configured to obtain in-focus pixels in the captured images, generate mask images, reconstruct a large depth of field pattern image based on the captured images and reconstruct the object profile.Type: ApplicationFiled: December 30, 2019Publication date: July 1, 2021Applicant: Industrial Technology Research InstituteInventors: Ludovic Angot, Yueh-Yi Lai
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Patent number: 10571252Abstract: A surface topography optical measuring system including image capture modules, a control module and a computation module is provided. Each image capture module includes an electronically controlled focal length tunable lens, an optical assembly and an image sensor, wherein the image capture modules respectively capture images at different heights between a lowest and a highest surfaces of an object. The control module is coupled to the image capture modules to independently control the image capture modules. The computation module is coupled to the control module and the image sensor of each image capture module, wherein the computation module perform calibration of the surface topography optical measuring system and assesses in-focused pixels in the captured images to measure a height difference between a highest and a lowest surfaces of the object or between any surfaces of interest of the object. A surface topography optical measuring method is also provided.Type: GrantFiled: July 17, 2018Date of Patent: February 25, 2020Assignee: Industrial Technology Research InstituteInventors: Ludovic Angot, Yueh-Yi Lai
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Publication number: 20200025555Abstract: A surface topography optical measuring system including image capture modules, a control module and a computation module is provided. Each image capture module includes an electronically controlled focal length tunable lens, an optical assembly and an image sensor, wherein the image capture modules respectively capture images at different heights between a lowest and a highest surfaces of an object. The control module is coupled to the image capture modules to independently control the image capture modules. The computation module is coupled to the control module and the image sensor of each image capture module, wherein the computation module perform calibration of the surface topography optical measuring system and assesses in-focused pixels in the captured images to measure a height difference between a highest and a lowest surfaces of the object or between any surfaces of interest of the object. A surface topography optical measuring method is also provided.Type: ApplicationFiled: July 17, 2018Publication date: January 23, 2020Applicant: Industrial Technology Research InstituteInventors: Ludovic Angot, Yueh-Yi Lai
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Patent number: 9958267Abstract: An apparatus and a method for dual mode depth measurement are provided. The apparatus is used for measuring a depth information of a specular surface in a depth from defocus (DFD) mode or measuring a depth information of a textured surface in a depth from focus (DFF) mode. The apparatus includes a light source, a controller, a processor, a lighting optical system, an imaging optical system, a beam splitter and a camera. The controller is for switching between the depth from defocus mode and the depth from focus mode. The lighting optical system is used to focus a light from the light source on an object surface in the depth from defocus mode, and the lighting optical system is used to illuminate the object surface with a uniform irradiance in the depth from focus mode.Type: GrantFiled: December 21, 2015Date of Patent: May 1, 2018Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Kun-Lung Tseng, Yi-Heng Chou
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Patent number: 9894255Abstract: A method and a system for depth selective segmentation of an object are provided. The method comprises the following steps. An image is captured in an invisible domain of the optical spectrum by illuminating a scene of interest under an illumination corresponding to said invisible domain of the optical spectrum by an invisible light illumination unit. A binary mask is obtained from the image according to a threshold. Part of the image is eliminated by applying the binary mask to the image, and resulting in another image. The threshold is changed and another binary mask is obtained. The latest obtained binary mask is applied to the latest captured image. The step of changing of the threshold, the step of obtaining a mask and the step of applying the latest obtained binary mask on the latest captured image are performed at least once.Type: GrantFiled: May 29, 2014Date of Patent: February 13, 2018Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Chun-Te Wu, Wei-Yi Lee
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Publication number: 20170178334Abstract: An apparatus and a method for dual mode depth measurement are provided. The apparatus is used for measuring a depth information of a specular surface in a depth from defocus (DFD) mode or measuring a depth information of a textured surface in a depth from focus (DFF) mode. The apparatus includes a light source, a controller, a processor, a lighting optical system, an imaging optical system, a beam splitter and a camera. The controller is for switching between the depth from defocus mode and the depth from focus mode. The lighting optical system is used to focus a light from the light source on an object surface in the depth from defocus mode, and the lighting optical system is used to illuminate the object surface with a uniform irradiance in the depth from focus mode.Type: ApplicationFiled: December 21, 2015Publication date: June 22, 2017Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic ANGOT, Kun-Lung TSENG, Yi-Heng CHOU
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Publication number: 20170177964Abstract: According to embodiments of the disclosure, an optical inspection system and an optical inspection method thereof are provided. The optical inspection system may include a lens group, a light source and a lens controlling module. The light source is configured to illuminate an object. The lens group is configured to project the light from the light source as a collimated rectangular shaped light. The lens controlling module is configured to switch the lens group for changing an irradiance of the collimated rectangular shaped light and adjusting an illuminated area of the collimated rectangular shaped light on an object surface of the object.Type: ApplicationFiled: December 18, 2015Publication date: June 22, 2017Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chi-Lin WU, Ludovic ANGOT, An-Chun LUO
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Publication number: 20160178353Abstract: An apparatus and a method for obtaining depth information in a scene are provided. The apparatus may include an imaging device for capturing an image of the scene and at least one non-imaging depth sensor. An image of the scene is captured by the imaging device and then segmented to obtain a segmented image of an object in at least one region of interest. The non-imaging depth sensor measures a distance from the imaging device to the object in the at least one region of interest of the image captured by the imaging sensor. A depth may be assigned to the at least one segment of the object according to the measured distance.Type: ApplicationFiled: December 19, 2014Publication date: June 23, 2016Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic ANGOT, Wei-Yi LEE
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Patent number: 9228829Abstract: A method and a system for measuring a distance from a reference point to an object are provided. The method comprises the following steps. At least one image of an object is captured through a lens comprising a phase mask composed of a parallel plate and a wedge prism. At least two corresponding regions of interest (ROI) are obtained from the images. The regions of interest correspond to identical portions of the object. The relative coordinates between corresponding locations within the corresponding regions of interest is measured. The distance is calculated according to the relative coordinates.Type: GrantFiled: July 30, 2014Date of Patent: January 5, 2016Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Chuan-Chung Chang
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Publication number: 20150237325Abstract: A method of converting 2D images to 3D images and system thereof is provided. According to one embodiment, the method comprises receiving a plurality of 2D images from an imaging device; obtaining motion parameters from a sensor associated with the imaging device; selecting at least two 2D images from the plurality of 2D images based on the motion parameters; determining a depth map based on the selected 2D images and the motion parameters corresponding to the selected 2D images; and generating a 3D image based on the depth map and one of the plurality of 2D images.Type: ApplicationFiled: March 15, 2013Publication date: August 20, 2015Inventors: Ludovic Angot, Wei-Jia Huang, Chun-Te Wu, Chia-Hang Ho
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Patent number: 9066086Abstract: Methods for generating stereoscopic views from monoscopic endoscope images and systems using the same are provided. First, monoscopic images are obtained by capturing images of organs in an operating field via an endoscope. A background depth map of the operating field is obtained for each image. An instrument depth map corresponding to an instrument is obtained for each image, wherein the instrument is inserted in a patient's body cavity. The background depth maps and the instrument depth maps are merged to generate an integrated depth map for each image. Stereoscopic views are generated according to the monoscopic images and the integrated depth maps.Type: GrantFiled: December 8, 2010Date of Patent: June 23, 2015Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Kai-Che Liu, Wei-Jia Huang
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Patent number: 9030469Abstract: Methods for generating depth maps from monocular still image or monocular video and systems using the same are provided. First, an initial depth map is estimated or arbitrary defined. For video inputs, motion information can be used, for still image the initial background can be arbitrary set by default, chosen by the user or can be estimated. Estimation of the initial depth map can be based on a contrast map or a blur map. The initial depth map defines initial depth values for the respective pixels of the monocular image or monocular motion picture frames. The respective pixels of the original image or video frame data are mapped to the initial depth map according to positions of the pixels, in order to obtain corresponding initial depth values.Type: GrantFiled: November 18, 2009Date of Patent: May 12, 2015Assignee: Industrial Technology Research InstituteInventors: Wei-Jia Huang, Kai-Che Liu, Ludovic Angot
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Publication number: 20150117718Abstract: A method and a system for measuring a distance from a reference point to an object are provided. The method comprises the following steps. At least one image of an object is captured through a lens comprising a phase mask composed of a parallel plate and a wedge prism. At least two corresponding regions of interest (ROI) are obtained from the images. The regions of interest correspond to identical portions of the object. The relative coordinates between corresponding locations within the corresponding regions of interest is measured. The distance is calculated according to the relative coordinates.Type: ApplicationFiled: July 30, 2014Publication date: April 30, 2015Inventors: Ludovic ANGOT, Chuan-Chung CHANG
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Publication number: 20140368661Abstract: A method and a system for depth selective segmentation of an object are provided. The method comprises the following steps. An image is captured in an invisible domain of the optical spectrum by illuminating a scene of interest under an illumination corresponding to said invisible domain of the optical spectrum by an invisible light illumination unit. A binary mask is obtained from the image according to a threshold. Part of the image is eliminated by applying the binary mask to the image, and resulting in another image. The threshold is changed and another binary mask is obtained. The latest obtained binary mask is applied to the latest captured image. The step of changing of the threshold, the step of obtaining a mask and the step of applying the latest obtained binary mask on the latest captured image are performed at least once.Type: ApplicationFiled: May 29, 2014Publication date: December 18, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic ANGOT, Chun-Te WU, Wei-Yi LEE
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Publication number: 20140293007Abstract: A method and an image acquisition system for rendering stereoscopic images from monoscopic images are provided. In the present method, an imaging unit of the image acquisition system is moved laterally back and forth to capture a plurality of images. Then, a disparity between each two of the captured images is computed and a one or more pairs of images having an appropriate fixed disparity is selected from the captured images. Finally, the selected one or more pairs of images is displayed so as to render a stereoscopic image.Type: ApplicationFiled: November 8, 2011Publication date: October 2, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Chun-Te Wu, Wei-Jia Huang
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Publication number: 20130259315Abstract: Methods for generating stereoscopic views from monoscopic endoscope images and systems using the same are provided. First, monoscopic images are obtained by capturing images of organs in an operating field via an endoscope. A back-ground depth map of the operating field is obtained for each image. An instrument depth map corresponding to an instrument is obtained for each image, wherein the instrument is inserted in a patient's body cavity. The background depth maps and the instrument depth maps are merged to generate an integrated depth map for each image. Stereoscopic views are generated according to the monoscopic images and the integrated depth maps.Type: ApplicationFiled: December 8, 2010Publication date: October 3, 2013Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Kai-Che Liu, Wei-Jia Huang
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Publication number: 20130162629Abstract: Methods for generating depth maps from monocular still image or monocular video and systems using the same are provided. First, an initial depth map is estimated or arbitrary defined. For video inputs, motion information can be used, for still image the initial background can be arbitrary set by default, chosen by the user or can be estimated. Estimation of the initial depth map can be based on a contrast map or a blur map. The initial depth map defines initial depth values for the respective pixels of the monocular image or monocular motion picture frames. The respective pixels of the original image or video frame data are mapped to the initial depth map according to positions of the pixels, in order to obtain corresponding initial depth values.Type: ApplicationFiled: November 18, 2009Publication date: June 27, 2013Inventors: Wei-Jia Huang, Kai-Che Liu, Ludovic Angot
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Publication number: 20130137921Abstract: A propelling system disposed in a chamber of a capsule is provided. The propelling system includes a mass and a damping module. The mass is configured for vibrating in the chamber along a plurality of directions. The damping module is coupled between the mass and the capsule for absorbing the kinetic energy of the mass, the damping module provides the smallest damping effect along a first direction. The disclosure further provides a capsule, which includes a shell having a chamber and at least one aforementioned propelling system disposed in the chamber. Accordingly, the capsule can be autonomously propelled by the propelling force autonomously produced by the propelling system.Type: ApplicationFiled: July 30, 2012Publication date: May 30, 2013Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ludovic Angot, Chun-Te Wu, Yi-Jen Fang