Patents by Inventor Rongxin Jiang
Rongxin Jiang 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: 11874371Abstract: The present invention a sparse optimization method based on cross-shaped three-dimensional imaging sonar array, comprising the following steps: first, constructing a beam pattern simultaneously applicable to a near field and a far field based on a cross-shaped array; then, constructing an energy function required by sparse optimization according to the beam pattern; then, introducing an array element position disturbance into a simulated annealing algorithm to increase the degree of freedom of the sparse process and increase the sparse rate of the sparse array, and using the simulated annealing algorithm to sparse optimization of the energy function; finally, after optimization, a sparse optimization cross-shaped array is obtained. The present invention ensures that the three-dimensional imaging sonar system has the desired performance at any distance, and greatly reduces the hardware complexity of the system.Type: GrantFiled: October 22, 2018Date of Patent: January 16, 2024Assignee: ZHEJIANG UNIVERSITYInventors: Yaowu Chen, Xuesong Liu, Fan Zhou, Rongxin Jiang, Dongdong Zhao
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Patent number: 11443437Abstract: The present invention discloses a ViBe-based three-dimensional sonar point cloud image segmentation method, characterized by including: (1) acquiring sonar data, and converting three-dimensional sonar depth image data corresponding to each frame of the sonar data to point cloud data under an orthogonal coordinate system; (2) sampling the point cloud data, and down-sampling the point cloud data to a plurality of adjacent voxels with side length being R by taking a variable resolution R as a function; (3) carrying out image segmentation on the down-sampled point cloud data by a ViBe algorithm; (4) carrying out accumulative scoring on each voxel according to an image segmentation result, and sorting foreground data and background data according to accumulative score; and (5) clustering the foreground data, and then carrying out expansion operation on the foreground data by taking an original point in the voxel as a center to obtain final foreground point cloud data.Type: GrantFiled: October 22, 2018Date of Patent: September 13, 2022Assignee: ZHEJIANG UNIVERSITYInventors: Yaowu Chen, Xiang Tian, Xuesong Liu, Rongxin Jiang
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Patent number: 11093790Abstract: The present invention discloses a distance statistics based method for 3D sonar point cloud image enhancement, comprising the following steps: (1) obtaining sonar data, and converting 3D sonar range image information corresponding to sonar data per frame into point cloud data in global coordinate; (2) using a kd-tree to search the point cloud data, and calculate Euclidean distance Lij between point Pi and the nearest K point cloud data; wherein, value range of i and j is 1?i?N and 1?j?K respectively; N refers to the total quantity of point cloud data; (3) excluding point cloud data corresponding to mean value of Lij which do not match the certain Gaussian distribution, and complete enhancement of 3D sonar point cloud image. Such method features in easy operation, high efficiency and convenience, which can effectively remove outlier points to minimize noise, and enhance point cloud image.Type: GrantFiled: December 8, 2017Date of Patent: August 17, 2021Assignee: ZHEJIANG UNIVERSITYInventors: Yaowu Chen, Xiang Tian, Rongxin Jiang, Xuesong Liu
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Publication number: 20210192268Abstract: The present invention discloses a distance statistics based method for 3D sonar point cloud image enhancement, comprising the following steps: (1) obtaining sonar data, and converting 3D sonar range image information corresponding to sonar data per frame into point cloud data in global coordinate; (2) using a kd-tree to search the point cloud data, and calculate Euclidean distance Lij between point Pi and the nearest K point cloud data; wherein, value range of i and j is 1?i?N and 1?j?K respectively; N refers to the total quantity of point cloud data; (3) excluding point cloud data corresponding to mean value of Lij which do not match the certain Gaussian distribution, and complete enhancement of 3D sonar point cloud image. Such method features in easy operation, high efficiency and convenience, which can effectively remove outlier points to minimize noise, and enhance point cloud image.Type: ApplicationFiled: December 8, 2017Publication date: June 24, 2021Inventors: YAOWU CHEN, XIANG TIAN, RONGXIN JIANG, XUESONG LIU
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Publication number: 20210190946Abstract: The present invention a sparse optimization method based on cross-shaped three-dimensional imaging sonar array, comprising the following steps: first, constructing a beam pattern simultaneously applicable to a near field and a far field based on a cross-shaped array; then, constructing an energy function required by sparse optimization according to the beam pattern; then, introducing an array element position disturbance into a simulated annealing algorithm to increase the degree of freedom of the sparse process and increase the sparse rate of the sparse array, and using the simulated annealing algorithm to sparse optimization of the energy function; finally, after optimization, a sparse optimization cross-shaped array is obtained. The present invention ensures that the three-dimensional imaging sonar system has the desired performance at any distance, and greatly reduces the hardware complexity of the system.Type: ApplicationFiled: October 22, 2018Publication date: June 24, 2021Inventors: YAOWU CHEN, XUESONG LIU, FAN ZHOU, RONGXIN JIANG, DONGDONG ZHAO
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Publication number: 20210049769Abstract: The present invention discloses a ViBe-based three-dimensional sonar point cloud image segmentation method, characterized by including: (1) acquiring sonar data, and converting three-dimensional sonar depth image data corresponding to each frame of the sonar data to point cloud data under an orthogonal coordinate system; (2) sampling the point cloud data, and down-sampling the point cloud data to a plurality of adjacent voxels with side length being R by taking a variable resolution R as a function; (3) carrying out image segmentation on the down-sampled point cloud data by a ViBe algorithm; (4) carrying out accumulative scoring on each voxel according to an image segmentation result, and sorting foreground data and background data according to accumulative score; and (5) clustering the foreground data, and then carrying out expansion operation on the foreground data by taking an original point in the voxel as a center to obtain final foreground point cloud data.Type: ApplicationFiled: October 22, 2018Publication date: February 18, 2021Inventors: YAOWU CHEN, XIANG TIAN, XUESONG LIU, RONGXIN JIANG
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Patent number: 9354311Abstract: This invention discloses a real-time phased array 3D acoustic imaging sonar processing system and method. The system comprises a 3D sonar dot data collection module, a 3D sonar dot data uploading module and a real-time 3D sonar dot data processing module of PC terminal; the method includes the following content: make use of two-stage FPGA signal processing to realize real-time formation of electronic focusing wave beam, and acquire 3D sonar dot data; further transmit 3D sonar dot data to PC terminal for setting and acquisition of directives; PC terminal aims to receive 3D sonar dot data for real-time processing: This includes real-time single-frame multilayer reconstruction, image registration and splice, 3D visualization and real-time saving of data. This invention features in compact structure, high real-time precision, clear image, easy alternation and high extendibility, which has effectively realized the real-time 3D processing of sonar targets.Type: GrantFiled: December 1, 2011Date of Patent: May 31, 2016Assignee: ZHEJIANG UNIVERSITYInventors: Yaowu Chen, Rongxin Jiang, Zhe Ji
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Patent number: 9053408Abstract: The present invention discloses a multi-core processor based high-speed digital textile printing processing system, comprising a gigabit Ethernet interface, a I2C interface, a Stream IO interface and a multi-core processor; the multi-core processor comprises a command receiving unit, a command processing unit, a command output unit, a data receiving unit, a compressed data buffer unit, a data decompression unit, a decompressed data buffer unit and a data output unit; meanwhile, the present invention also disclosed a multi-core processor based high-speed digital textile printing processing method. The present invention is centered on high-performance multi-core processor, which aims to implement high-speed transmission of printing data from PC to printing nozzle via the gigabit Ethernet and Stream IO interface as well as processing and transfer of printing commands via the gigabit Ethernet and I2C interface.Type: GrantFiled: December 25, 2012Date of Patent: June 9, 2015Assignee: ZHEJIANG UNIVERSITYInventors: Yaowu Chen, Rongxin Jiang, Pengjun Wang, Fan Zhou
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Publication number: 20140355064Abstract: The present invention discloses a multi-core processor based high-speed digital textile printing processing system, comprising a gigabit Ethernet interface, a I2C interface, a Stream IO interface and a multi-core processor; the multi-core processor comprises a command receiving unit, a command processing unit, a command output unit, a data receiving unit, a compressed data buffer unit, a data decompression unit, a decompressed data buffer unit and a data output unit; meanwhile, the present invention also disclosed a multi-core processor based high-speed digital textile printing processing method. The present invention is centered on high-performance multi-core processor, which aims to implement high-speed transmission of printing data from PC to printing nozzle via the gigabit Ethernet and Stream IO interface as well as processing and transfer of printing commands via the gigabit Ethernet and I2C interface.Type: ApplicationFiled: December 25, 2012Publication date: December 4, 2014Inventors: Yaowu Chen, Rongxin Jiang, Pengjun Wang, Fan Zhou
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Publication number: 20130272093Abstract: This invention discloses a real-time phased array 3D acoustic imaging sonar processing system and method. The system comprises a 3D sonar dot data collection module, a 3D sonar dot data uploading module and a real-time 3D sonar dot data processing module of PC terminal; the method includes the following content: make use of two-stage FPGA signal processing to realize real-time formation of electronic focusing wave beam, and acquire 3D sonar dot data; further transmit 3D sonar dot data to PC terminal for setting and acquisition of directives; PC terminal aims to receive 3D sonar dot data for real-time processing: This includes real-time single-frame multilayer reconstruction, image registration and splice, 3D visualization and real-time saving of data. This invention features in compact structure, high real-time precision, clear image, easy alternation and high extendibility, which has effectively realized the real-time 3D processing of sonar targets.Type: ApplicationFiled: December 1, 2011Publication date: October 17, 2013Applicant: ZHEJIANG UNIVERSITYInventors: Yaowu Chen, Rongxin Jiang, Zhe Ji