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1. 发明授权

US11093790B2 Distance statistics based method for 3D sonar point cloud image enhancement 有权
公开(公告)号：US11093790B2
公开(公告)日：2021-08-17
申请号：US16079543
申请日：2017-12-08
申请人： ZHEJIANG UNIVERSITY
发明人： Yaowu Chen , Xiang Tian , Rongxin Jiang , Xuesong Liu
IPC分类号： G06K9/40 , G06K9/62 , G06T5/00
摘要： 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.

2. 发明授权

US11333759B2 Embedded processor-based three-dimensional acoustic imaging real-time signal processing device 有权
公开(公告)号：US11333759B2
公开(公告)日：2022-05-17
申请号：US16308401
申请日：2018-02-12
申请人： ZHEJIANG UNIVERSITY
发明人： Xuesong Liu , Fan Zhou , Dongdong Zhao , Yaowu Chen
IPC分类号： G01S15/89 , G06T1/20 , G01S7/62
摘要： The present invention had disclosed an embedded processor based 3D acoustic imaging real-time signal processing device of modularized design; the system comprises an embedded GPU signal processing subsystem, a signal interaction subsystem and a signal acquisition subsystem. The system takes Tegra K1 embedded GPU processor as the core; Tegra K1 embedded GPU processor is provided with features of OpenGL4.4, OpenGL ES 3.1 and CUDA, which has high parallel image processing capability and abundant high-speed data interconnection interface; it is especially applicable to high-speed data transmission and effective calculation of image algorithm for 3D acoustic imaging real-time signal processing device. Meanwhile, it can realize high-speed data interaction between signal processing subsystem and numerous signal acquisition subsystems; the whole system has powerful data interaction capability and real-time parallel processing capability.

3. 发明申请

US20140355064A1 MULTI-CORE PROCESSOR BASED HIGH-SPEED DIGITAL TEXTILE PRINTING PROCESSING SYSTEM AND METHOD 有权
标题翻译：基于多核处理器的高速数字印刷加工系统及方法
公开(公告)号：US20140355064A1
公开(公告)日：2014-12-04
申请号：US14369816
申请日：2012-12-25
申请人： ZHEJIANG UNIVERSITY
发明人： Yaowu Chen , Rongxin Jiang , Pengjun Wang , Fan Zhou
IPC分类号： G06K15/02 , G06F3/12
CPC分类号： G06K15/1809 , G06F3/1206 , G06F3/1215 , G06F3/122 , G06F3/1247 , G06F3/1279 , G06F3/1289 , G06K15/1817 , G06K15/1894
摘要： 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. Meanwhile, it is also capable of executing such processing as decompression of printing images and image rotation, which has significantly improved the work efficiency of digital textile printing system
摘要翻译：本发明公开了一种基于多核处理器的高速数字纺织品印刷处理系统，包括千兆以太网接口，I2C接口，流IO接口和多核处理器; 多核处理器包括命令接收单元，命令处理单元，命令输出单元，数据接收单元，压缩数据缓冲单元，数据解压缩单元，解压缩数据缓冲单元和数据输出单元; 同时，本发明还公开了一种基于多核处理器的高速数字纺织印花处理方法。本发明以高性能多核处理器为中心，其目的是通过千兆以太网和流IO接口实现从PC到打印喷嘴的打印数据的高速传输，以及通过千兆比特来处理和传送打印命令以太网和I2C接口。同时，它还能够执行诸如打印图像的减压和图像旋转的处理，这显着提高了数字纺织印刷系统的工作效率

4. 发明授权

US11217018B2 Point cloud mean background subtraction based method for 3D sonar image modeling 有权
公开(公告)号：US11217018B2
公开(公告)日：2022-01-04
申请号：US16075946
申请日：2017-12-08
申请人： ZHEJIANG UNIVERSITY
发明人： Xuesong Liu , Fan Zhou , Yaowu Chen
IPC分类号： G06T19/00 , G06T7/136 , G06T7/194
摘要： The present invention discloses a point cloud mean background subtraction based method for 3D sonar image modeling, comprising: (1) obtaining sonar data, and convert 3D sonar range image information corresponding to sonar data per frame into point cloud data for overall coordinate; such point cloud data will form image pixels; (2) taking the mean value u(x,y,z) of pixels at the same position in a series sequential frame images as pixels at the same position in the background model to obtain the background model; define threshold value TH for background standard based on pixel in each image; (3) testing current frame image I(x,y,z) based on background model and threshold value TH to obtain output image; (4) using current frame image I(x,y,z) to update background model and threshold value TH. Such method can quickly identify prospect target in the background, and establish corresponding arithmetic model for further processing; it features in quick processing, which can automatically update background model according to changing environment.

5. 发明授权

US08970891B2 Multi-core processor based image data rotating processing system for high-speed digital textile printer and method 有权
标题翻译：基于多核处理器的图像数据旋转处理系统，用于高速数字纺织打印机和方法
公开(公告)号：US08970891B2
公开(公告)日：2015-03-03
申请号：US14370007
申请日：2012-12-25
申请人： Zhejiang University
发明人： Yaowu Chen , Xiang Tian , Yeqiang Han
IPC分类号： G06F3/12 , G06K15/02
CPC分类号： G06K15/021 , B41J29/393 , G06F3/1215 , G06F3/1244 , G06F3/1288 , G06K15/1835 , G06K15/1848
摘要： The present invention discloses a multi-core processor based image data rotating processing system for high-speed digital textile printers, including a data receiving equipment, a data analysis and processing equipment, a data transmission channel and data output equipment. The present invention also discloses a multi-core processor based image data rotating processing method for high-speed printers; it aims to receive data via the Ethernet interface, use numerous cores of the processor for parallel data processing, and implement data output via FPGA. As compared with prior arts, the system and method of the present invention can significantly improve the data gyration efficiency and output, and implement high yield of digital textile printers.
摘要翻译：本发明公开了一种用于高速数字纺织打印机的基于多核处理器的图像数据旋转处理系统，包括数据接收设备，数据分析和处理设备，数据传输通道和数据输出设备。本发明还公开了一种用于高速打印机的基于多核处理器的图像数据旋转处理方法; 它旨在通过以太网接口接收数据，使用处理器的大量核心进行并行数据处理，并通过FPGA实现数据输出。与现有技术相比，本发明的系统和方法可以显着提高数据回转效率和输出，并实现数字纺织打印机的高产量。

6. 发明授权

US11874371B2 Sparse optimization method based on cross-shaped three-dimensional imaging sonar array 有权
公开(公告)号：US11874371B2
公开(公告)日：2024-01-16
申请号：US17056759
申请日：2018-10-22
申请人： ZHEJIANG UNIVERSITY
发明人： Yaowu Chen , Xuesong Liu , Fan Zhou , Rongxin Jiang , Dongdong Zhao
IPC分类号： G01S15/89 , G01S7/526
CPC分类号： G01S15/8915 , G01S7/526 , G01S15/8968
摘要： 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. It provides an effective method to achieve high performance and ultra-low complexity 3D imaging sonar system.

7. 发明授权

US11443437B2 Vibe-based three-dimensional sonar point cloud image segmentation method 有权
公开(公告)号：US11443437B2
公开(公告)日：2022-09-13
申请号：US16980390
申请日：2018-10-22
申请人： ZHEJIANG UNIVERSITY
发明人： Yaowu Chen , Xiang Tian , Xuesong Liu , Rongxin Jiang
IPC分类号： G06T7/20 , G06T7/10 , G06T7/194 , G06T7/136 , G06T7/11
摘要： 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.

8. 发明授权

US09053408B2 Multi-core processor based high-speed digital textile printing processing system and method 有权
标题翻译：基于多核处理器的高速数字纺织印花加工系统及方法
公开(公告)号：US09053408B2
公开(公告)日：2015-06-09
申请号：US14369816
申请日：2012-12-25
申请人： ZHEJIANG UNIVERSITY
发明人： Yaowu Chen , Rongxin Jiang , Pengjun Wang , Fan Zhou
IPC分类号： G06K15/02 , G06F3/12
CPC分类号： G06K15/1809 , G06F3/1206 , G06F3/1215 , G06F3/122 , G06F3/1247 , G06F3/1279 , G06F3/1289 , G06K15/1817 , G06K15/1894
摘要： 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. Meanwhile, it is also capable of executing such processing as decompression of printing images and image rotation, which has significantly improved the work efficiency of digital textile printing system.
摘要翻译：本发明公开了一种基于多核处理器的高速数字纺织品印刷处理系统，包括千兆以太网接口，I2C接口，流IO接口和多核处理器; 多核处理器包括命令接收单元，命令处理单元，命令输出单元，数据接收单元，压缩数据缓冲单元，数据解压缩单元，解压缩数据缓冲单元和数据输出单元; 同时，本发明还公开了一种基于多核处理器的高速数字纺织印花处理方法。本发明以高性能多核处理器为中心，其目的是通过千兆以太网和流IO接口实现从PC到打印喷嘴的打印数据的高速传输，以及通过千兆比特来处理和传送打印命令以太网和I2C接口。同时，它还能够执行诸如打印图像的减压和图像旋转的处理，这显着地提高了数字纺织品印刷系统的工作效率。

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