Patents by Inventor Chao ZUO
Chao ZUO 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: 11971726Abstract: A method of constructing an indoor wall corner two-dimensional semantic map based on a robot platform includes controlling, by the master control computer, the robot platform to move indoors, collecting, by the lidar sensor, a distance between an indoor object and the robot platform and a direction angle between the indoor object and the robot platform in real time and transmitting the distance and the direction angle to the master control computer, and obtaining, by the master control computer, an environment grid map and a real-time pose of the robot platform by processing the distance between the indoor object and the robot platform and the direction angle between the indoor object and the robot platform based on Gmapping algorithm; constructing a semantic segmentation data set as a training set on the master control computer and obtaining a predicted non-wall corner semantic label.Type: GrantFiled: September 3, 2021Date of Patent: April 30, 2024Assignee: Wuhan University of Science and TechnologyInventors: Lin Jiang, Dongjun Fang, Wenkang Nie, Chao Xiang, Shengxi Jin, Jianpeng Zuo
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Patent number: 11961244Abstract: Disclosed is a high-precision dynamic real-time 360-degree omnidirectional point cloud acquisition method based on fringe projection. The method comprises: firstly, by means of the fringe projection technology based on a stereoscopic phase unwrapping method, and with the assistance of an adaptive dynamic depth constraint mechanism, acquiring high-precision three-dimensional (3D) data of an object in real time without any additional auxiliary fringe pattern; and then, after a two-dimensional (2D) matching points optimized by the means of corresponding 3D information is rapidly acquired, by means of a two-thread parallel mechanism, carrying out coarse registration based on Simultaneous Localization and Mapping (SLAM) technology and fine registration based on Iterative Closest Point (ICP) technology.Type: GrantFiled: August 27, 2020Date of Patent: April 16, 2024Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chao Zuo, Jiaming Qian, Qian Chen, Shijie Feng, Tianyang Tao, Yan Hu, Wei Yin, Liang Zhang, Kai Liu, Shuaijie Wu, Mingzhu Xu, Jiaye Wang
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Publication number: 20240120368Abstract: A method of fabricating an integrated circuit includes etching trenches in a first surface of a semiconductor layer. A trench dielectric layer is formed over the first surface and over bottoms and sidewalls of the trenches and a doped polysilicon layer is formed over the trench dielectric layer and within the trenches. The doped polysilicon layer is patterned to form a polysilicon bridge that connects to the polysilicon within the filled trenches and a blanket implant of a first dopant is directed to the polysilicon bridge and to the first surface. The blanket implant forms a contact region extending from the first surface into the semiconductor layer.Type: ApplicationFiled: December 18, 2023Publication date: April 11, 2024Inventors: Jing Hu, ZHI PENG Feng, Chao Zuo, Dongsheng Liu, Yunlong Liu, Manoj K Jain, Shengpin Yang
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Patent number: 11934371Abstract: A data processing method includes: generating a service serial number for a target service according to a preset naming rule; obtaining service data of the target service; obtaining a target data table from a plurality of pre-configured data tables, according to the service serial number; and storing the service data to the target data table.Type: GrantFiled: May 13, 2019Date of Patent: March 19, 2024Assignee: NETSUNION CLEARING CORPORATIONInventors: Xiang Lu, Jianjiang Xu, Yantao Gao, Wenbin Nie, Qin Huang, Yu Yang, Qiang Zhang, Lei Fan, Chao Zuo
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Patent number: 11906286Abstract: The invention discloses a deep learning-based temporal phase unwrapping method for fringe projection profilometry. First, four sets of three-step phase-shifting fringe patterns with different frequencies (including 1, 8, 32, and 64) are projected to the tested objects. The three-step phase-shifting fringe images acquired by the camera are processed to obtain the wrapped phase map using a three-step phase-shifting algorithm. Then, a multi-frequency temporal phase unwrapping (MF-TPU) algorithm is used to unwrap the wrapped phase map to obtain a fringe order map of the high-frequency phase with 64 periods. A residual convolutional neural network is built, and its input data are set to be the wrapped phase maps with frequencies of 1 and 64, and the output data are set to be the fringe order map of the high-frequency phase with 64 periods. Finally, the training dataset and the validation dataset are built to train and validate the network.Type: GrantFiled: July 5, 2019Date of Patent: February 20, 2024Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Qian Chen, Chao Zuo, Shijie Feng, Yuzhen Zhang, Guohua Gu
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Patent number: 11893719Abstract: A single-shot differential phase contrast quantitative phase imaging method based on color multiplexing illumination. A color multiplexing illumination solution is used to realize single-shot differential phase contrast quantitative phase imaging. In the single-shot color multiplexing illumination solution, three illumination wavelengths of red, green, and blue are used to simultaneously illuminate a sample, and the information of the sample in multiple directions is converted into intensity information on different channels of a color image. By performing channel separation on this color image, the information about the sample at different spatial frequencies can be obtained.Type: GrantFiled: August 18, 2020Date of Patent: February 6, 2024Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Qian Chen, Yao Fan, Chao Zuo, Jiasong Sun, Xiangpeng Pan, Shijie Feng, Yuzhen Zhang, Guohua Gu, Jiaji Li, Jialin Zhang
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Publication number: 20240037765Abstract: Disclosed is a high-precision dynamic real-time 360-degree omnidirectional point cloud acquisition method based on fringe projection. The method comprises: firstly, by means of the fringe projection technology based on a stereoscopic phase unwrapping method, and with the assistance of an adaptive dynamic depth constraint mechanism, acquiring high-precision three-dimensional (3D) data of an object in real time without any additional auxiliary fringe pattern; and then, after a two-dimensional (2D) matching points optimized by the means of corresponding 3D information is rapidly acquired, by means of a two-thread parallel mechanism, carrying out coarse registration based on Simultaneous Localization and Mapping (SLAM) technology and fine registration based on Iterative Closest Point (ICP) technology.Type: ApplicationFiled: August 27, 2020Publication date: February 1, 2024Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chao ZUO, Jiaming QIAN, Qian CHEN, Shijie FENG, Tianyang TAO, Yan HU, Wei YIN, Liang ZHANG, Kai LIU, Shuaijie WU, Mingzhu XU, Jiaye WANG
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Patent number: 11888021Abstract: A method of fabricating an integrated circuit includes etching trenches in a first surface of a semiconductor layer. A trench dielectric layer is formed over the first surface and over bottoms and sidewalls of the trenches and a doped polysilicon layer is formed over the trench dielectric layer and within the trenches. The doped polysilicon layer is patterned to form a polysilicon bridge that connects to the polysilicon within the filled trenches and a blanket implant of a first dopant is directed to the polysilicon bridge and to the first surface. The blanket implant forms a contact region extending from the first surface into the semiconductor layer.Type: GrantFiled: September 29, 2021Date of Patent: January 30, 2024Assignee: Texas Instruments IncorporatedInventors: Jing Hu, Zhi Peng Feng, Chao Zuo, Dongsheng Liu, Yunlong Liu, Manoj K Jain, Shengpin Yang
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Publication number: 20240020866Abstract: The invention discloses a three-dimensional (3D) measurement method based on end-to-end deep learning for speckle projection. First, the speckle pattern was projected by the projector and collected simultaneously by the stereo camera. The speckle images after stereo rectification are fed into the stereo matching network. A feature extraction sub-network based on shared weights processes the speckle images to obtain a series of low-resolution 3D feature tensors, The feature tensor is fed into the saliency object detection sub-network to detect foreground information in the speckle images, producing a full-resolution valid mask map. A 4D matching cost volume is generated using the feature tensor of both views based on the candidate disparity range, filtered by a series of 3D convolutional layers to achieve cost aggregation, so that the initial disparity map is obtained by disparity regression.Type: ApplicationFiled: August 18, 2021Publication date: January 18, 2024Applicant: Nanjing University of Science and TechnologyInventors: Chao Zuo, Qian Chen, Shijie Feng, Jiasong Sun, Yuzhen Zhang, Guohua Gu
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Publication number: 20230359010Abstract: The invention discloses a miniaturized, low-cost, multi-contrast label-free microscopic imaging system. The imaging system is based on an inverted microscopic structure, a highly integrated optical system is designed by adopting a micro lens having a fixed focal length, and a complex optical system of a traditional microscope system is replaced, such that the whole microscope is highly integrated. The system uses a programmable LED array as an illumination light source the LED array is controlled by a computer to display different illumination modes, six imaging functions of a bright field, a dark field a rainbow dark field, Rheinberg optical dyeing, differential phase contrast, and quantitative phase imaging are achieved; and diversified unmarked imaging methods are provided for biological applications.Type: ApplicationFiled: August 18, 2021Publication date: November 9, 2023Applicant: Nanjing University of Science and TechnologyInventors: Qian Chen, Chao Zuo, Jiasong Sun, Shijie Feng, Yuzhen Zhang, Guohua Gu
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Patent number: 11808564Abstract: A calibration method for fringe projection systems based on plane mirrors. Firstly, two mirrors are placed behind the tested object. Through the reflection of mirrors, the camera can image the measured object from the front and other two perspectives, so as to obtain 360-degree two-dimensional information of the measured object. The projector projects three sets of phase-shifting fringe patterns with frequencies of 1, 8, and 64. The camera captures the fringe image to obtain an absolute phase map with a frequency of 64 by using the phase-shifting method and the temporal phase unwrapping algorithm. By using the calibration parameters between the projector and the camera, the absolute phase map can be converted into three-dimensional information of the measured object. Then, the mirror calibration is realized by capturing a set of 3D feature point pairs, so that the 3D information from different perspectives is transformed into a unified world coordinate system.Type: GrantFiled: August 7, 2020Date of Patent: November 7, 2023Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chao Zuo, Wei Yin, Qian Chen, Shijie Feng, Jiasong Sun, Tianyang Tao, Yan Hu, Liang Zhang, Jiaming Qian
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Patent number: 11781966Abstract: The present invention discloses a three-dimensional diffraction tomography microscopy imaging method based on LED array coded illumination. Firstly, acquiring the raw intensity images, three sets of intensity image stacks are acquired at different out-of-focus positions by moving the stage or using electrically tunable lens. And then, after acquiring the intensity image stacks of the object to be measured at different out-of-focus positions, the three-dimensional phase transfer function of the microscopy imaging system with arbitrary shape illumination is derived. Further, the three-dimensional phase transfer function of the microscopic system under circular and annular illumination with different coherence coefficients is obtained as well, and the three-dimensional quantitative refractive index is reconstructed by inverse Fourier transform of the three-dimensional scattering potential function. The scattering potential function is converted into the refractive index distribution.Type: GrantFiled: July 5, 2019Date of Patent: October 10, 2023Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chao Zuo, Qian Chen, Jiaji Li, Jiasong Sun, Yao Fan, Shijie Feng, Yuzhen Zhang
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Patent number: 11650406Abstract: A microscopic imaging method of phase contrast (PC) and differential interference contrast (DIC) based on the transport of intensity equation (TIE) includes capturing three intensity images along the optical axis; solving the TIE by deconvolution to obtain the quantitative phase; obtaining the intensity image under the DIC imaging mode according to the DIC imaging principle; and obtaining the corresponding phase image of PC imaging mode according to the PC imaging principle. The method can endow the bright-field microscope with the ability to realize PC and DIC imaging without complex modification of the traditional bright-field microscope. In addition, it has the same imaging performance as the phase contrast microscope and differential interference contrast microscope, which are expensive, complex-structure, and has strict environmental conditions.Type: GrantFiled: July 5, 2019Date of Patent: May 16, 2023Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chao Zuo, Qian Chen, Jiasong Sun, Yuzhen Zhang, Guohua Gu
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Publication number: 20230122985Abstract: The invention discloses a single-frame fringe pattern analysis method based on multi-scale generative adversarial network. A multi-scale generative adversarial neural network model is constructed and a comprehensive loss function is applied. Next, training data are collected to train the multi-scale generative adversarial network. During the prediction, a fringe pattern is fed into the trained multi-scale network where the generator outputs the sine term, cosine term, and the modulation image of the input pattern. Finally, the arctangent function is applied to compute the phase. When the network is trained, the parameters of the network do not need to manually tune during the calculation. Since the input of the neural network is only a single fringe pattern, the invention provides an efficient and high-precision phase calculation method for moving objects.Type: ApplicationFiled: August 27, 2020Publication date: April 20, 2023Applicant: Nanjing University of Science and TechnologyInventors: Shijie FENG, Qian CHEN, Chao ZUO, Yuzhen ZHANG, Jiasong SUN, Yan HU, Wei YIN, Jiaming QIAN
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Patent number: 11555992Abstract: The invention discloses a programmable annular LED illumination-based high efficiency quantitative phase microscopy imaging method, the proposed method comprising the following steps: the derivation of system optical transfer function in a partially coherent illumination imaging system; the derivation of phase transfer function with the weak object approximation under the illumination of tilted axially symmetric coherent point illumination source; the extension of illumination from an axially symmetric coherence point source to a discrete annular point source, and the optical transfer function can be treated as an incoherent superposition of each pair of tilted axially symmetric coherent point sources. The acquisition of raw intensity dataset; the implementation of deconvolution for quantitative phase reconstruction.Type: GrantFiled: February 26, 2018Date of Patent: January 17, 2023Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Qian Chen, Chao Zuo, Jiasong Sun, Shijie Feng, Yuzhen Zhang, Guohua Gu
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Publication number: 20220406885Abstract: A method of fabricating an integrated circuit includes etching trenches in a first surface of a semiconductor layer. A trench dielectric layer is formed over the first surface and over bottoms and sidewalls of the trenches and a doped polysilicon layer is formed over the trench dielectric layer and within the trenches. The doped polysilicon layer is patterned to form a polysilicon bridge that connects to the polysilicon within the filled trenches and a blanket implant of a first dopant is directed to the polysilicon bridge and to the first surface. The blanket implant forms a contact region extending from the first surface into the semiconductor layer.Type: ApplicationFiled: September 29, 2021Publication date: December 22, 2022Inventors: Jing Hu, Zhi Peng Feng, Chao Zuo, Dongsheng Liu, Yunlong Liu, Manoj K. Jain, Shengpin Yang
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Publication number: 20220366552Abstract: A single-shot differential phase contrast quantitative phase imaging method based on color multiplexing illumination. A color multiplexing illumination solution is used to realize single-shot differential phase contrast quantitative phase imaging. In the single-shot color multiplexing illumination solution, three illumination wavelengths of red, green, and blue are used to simultaneously illuminate a sample, and the information of the sample in multiple directions is converted into intensity information on different channels of a color image. By performing channel separation on this color image, the information about the sample at different spatial frequencies can be obtained.Type: ApplicationFiled: August 18, 2020Publication date: November 17, 2022Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Qian CHEN, Yao FAN, Chao ZUO, Jiasong SUN, Xiangpeng PAN, Shijie FENG, Yuzhen ZHANG, Guohua GU, Jiaji LI, Jialin ZHANG
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Patent number: 11487096Abstract: The patent discloses a differential phase contrast (DPC) quantitative phase microscopy method based on the optimal illumination pattern design. Firstly, the optimal illumination pattern corresponding to the isotropic phase transfer function of DPC quantitative phase imaging is derived, which is determined as a semi-annular illumination pattern with the illumination numerical aperture NAill equal to the numerical aperture NAobj of the objective lens. The illumination intensity distribution varies with the cosine of the illumination angle, and it can be expressed as S(?)=cos(?). This patent effectively compensates for the frequency loss of phase transfer, not only the high-frequency responses of PTF are enhanced, but also the transfer responses of low-frequency phase information is significantly improved.Type: GrantFiled: July 5, 2019Date of Patent: November 1, 2022Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Qian Chen, Chao Zuo, Yao Fan, Jiasong Sun, Jiaji Li, Shijie Feng, Yuzhen Zhang
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Publication number: 20220221270Abstract: A calibration method for fringe projection systems based on plane mirrors. Firstly, two mirrors are placed behind the tested object. Through the reflection of mirrors, the camera can image the measured object from the front and other two perspectives, so as to obtain 360-degree two-dimensional information of the measured object. The projector projects three sets of phase-shifting fringe patterns with frequencies of 1, 8, and 64. The camera captures the fringe image to obtain an absolute phase map with a frequency of 64 by using the phase-shifting method and the temporal phase unwrapping algorithm. By using the calibration parameters between the projector and the camera, the absolute phase map can be converted into three-dimensional information of the measured object. Then, the mirror calibration is realized by capturing a set of 3D feature point pairs, so that the 3D information from different perspectives is transformed into a unified world coordinate system.Type: ApplicationFiled: August 7, 2020Publication date: July 14, 2022Applicant: Nanjing University of Science and TechnologyInventors: Chao Zuo, Wei Yin, Qian Chen, Shijie Feng, Jiasong Sun, Tianyang Tao, Yan Hu, Liang Zhang, Jiaming Qian
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Publication number: 20220011563Abstract: The invention claims a microscopic imaging method of phase contrast (PC) and differential interference contrast (DIC) based on the transport of intensity equation (TIE). Firstly, three intensity images are captured along the optical axis; secondly, TIE is solved by deconvolution to obtain the quantitative phase; then, the intensity image under the DIC imaging mode is obtained according to the DIC imaging principle; finally, the corresponding phase image of PC imaging mode is obtained according to the PC imaging principle. The proposed approach can endow the bright-field microscope with the ability to realize PC and DIC imaging without complex modification of the traditional bright-field microscope. In other words, this method only needs to use the traditional bright-field microscope without adding any complex hardware. Through the PC and DIC algorithms, this method has the advantages of quantitative, high-speed, low-cost, simple structure, and less external interference.Type: ApplicationFiled: July 5, 2019Publication date: January 13, 2022Applicant: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Chao ZUO, Qian CHEN, Jiasong SUN, Yuzhen ZHANG, Guohua GU