公开(公告)号：US20240169691A1

公开(公告)日：2024-05-23

申请号：US18515832

申请日：2023-11-21

Applicant: MACAU UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Zhiyao LIANG ,  Jixiang YANG ,  Jianqing LI

IPC: G06V10/75 ,  G06V10/46 ,  G06V10/762 ,  G06V10/86 ,  G06V20/00

CPC classification number: G06V10/758 ,  G06V10/46 ,  G06V10/751 ,  G06V10/763 ,  G06V10/86 ,  G06V20/95

Abstract: A method for a copy-paste tampered image detection, including: extracting, using a scale-invariant feature transformation algorithm, key points of an image and features corresponding to the key points; constructing, using a gradient hash matching algorithm, a hash table based on the features, and putting the key points into rows corresponding to serial numbers of the hash table; performing a matching operation, using a k-nearest neighbor algorithm, on the key points in each row of the hash table to obtain key point pairs; and clustering and grouping, using a distance clustering filtering algorithm, the key point pairs, and retaining the key point pairs in a cluster group whose number of the key point pairs is greater than a quantity threshold; and marking circles in the image with each key point, in the key point pairs that are retained, as a center and according to a specified radius.

公开(公告)号：US20240087310A1

公开(公告)日：2024-03-14

申请号：US18063781

申请日：2022-12-09

Applicant: Macau University of Science and Technology

Inventor： Jianqing LI ,  Anran Yuan ,  Binbin WANG ,  Hailin ZOU ,  Jierui WANG

IPC: G06V20/10 ,  G06F16/51 ,  G06V10/764 ,  G06V10/774 ,  G06V10/82

CPC classification number: G06V20/188 ,  G06F16/51 ,  G06V10/764 ,  G06V10/774 ,  G06V10/82 ,  G06V2201/07

Abstract: The present disclosure relates to a method and system for multi-source algae image target detection, and relates to the field of monitoring of algal bloom events in fresh water. The method includes first crawling images of algae of a selected species by using a built automated algae crawling tool, where the images include all formats; classifying and labeling algae in the algae images, and forming a source domain dataset by using all the classified and labeled algae images; performing transfer learning by using a faster recurrent revolutional neural network (Faster RCNN) with reference to a target domain dataset, to obtain a multi-source algae image target detection model; and finally performing identification and classification by using the multi-source algae image target detection model.

公开(公告)号：US20150168216A1

公开(公告)日：2015-06-18

申请号：US14146727

申请日：2014-01-03

Applicant: MACAU UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Jianqing LI ,  Ben XU

IPC: G01J3/45 ,  G01J3/10 ,  G01K11/12 ,  G01J3/02

CPC classification number: G01J3/45 ,  G01J3/0218 ,  G01J3/10 ,  G01J2005/583 ,  G01K11/3206 ,  G01N21/45 ,  G01N2021/458

Abstract: An optical fiber environmental detection system comprising an interferometer, a broadband light source and a detector is disclosed. The interferometer further comprises a thin core fiber, a first single mode fiber and a second single mode fiber; wherein the thin core fiber is coupled to the first and second single mode fiber via a first junction and a second junction respectively. When an emission light reaches the first junction, high-order cladding modes will be excited. The excited cladding modes will interfere with the core mode at the second junction. The interferences determine the intensity maximum or minimum of the received signal. When there is an ambient environmental change, a shift of the received signal would be induced. According to the shift, environmental change, for instance ambient temperature, could be determined.

Abstract translation: 公开了一种包括干涉仪，宽带光源和检测器的光纤环境检测系统。 干涉仪还包括薄芯纤维，第一单模光纤和第二单模光纤; 其中所述薄芯纤维分别经由第一接头和第二接头耦合到所述第一和第二单模光纤。 当发射光到达第一结时，高阶包层模式将被激发。 激发的包层模式将干扰第二结的核心模式。 干扰决定了接收信号的强度最大值或最小值。 当周围环境变化时，会引起接收信号的偏移。 根据这一转变，可以确定环境变化，例如环境温度。

公开(公告)号：US20150009495A1

公开(公告)日：2015-01-08

申请号：US13933142

申请日：2013-07-02

Applicant: Macau University of Science and Technology

Inventor： Jianqing LI ,  Ben XU

IPC: G01J3/44

CPC classification number: H01S3/305 ,  G01J3/10 ,  H01S3/0092 ,  H01S3/1611 ,  H01S3/1643 ,  H01S2302/00

Abstract: A method of generating Raman laser for inducing fluorescence of pyrene and a system thereof is disclosed. The system comprises a pulsed laser, a frequency doubling crystal, a frequency quadrupling crystal, a light filter unit, a Raman cell, a prism, an optical diaphragm, an object lens and an optical fiber. The method of the present invention comprises the steps of emitting a laser beam pulse through the crystals as mentioned above such that a mixture of lasers of different wavelength is generated. The light filter unit is used to obtain a pure pump laser from the mixture of lasers. Finally, the Raman laser is obtained by directing the pump laser into a Raman cell, extracting different orders of stimulated Raman scattering lasers emitted from the Raman cell by the prism and selecting a predetermined order of stimulated Raman scattering laser by the optical diaphragm.

Abstract translation: 公开了一种生成用于诱导芘的荧光的拉曼激光的方法及其系统。 该系统包括脉冲激光器，倍频晶体，四倍频四极晶体，光滤波器单元，拉曼单元，棱镜，光学膜，物镜和光纤。 本发明的方法包括以下步骤：通过如上所述的晶体发射激光束脉冲，使得产生不同波长的激光器的混合物。 光过滤器单元用于从激光混合物获得纯泵浦激光器。 最后，通过将泵浦激光器引导到拉曼元件中，通过棱镜提取从拉曼单元发射的不同阶数的受激拉曼散射激光器并通过光学膜片选择受激拉曼散射激光器的预定次数来获得拉曼激光。

公开(公告)号：US20140354979A1

公开(公告)日：2014-12-04

申请号：US13907993

申请日：2013-06-03

Applicant: Macau University of Science and Technology

Inventor： Jianqing LI ,  Ben XU ,  Yuanyuan PAN

IPC: G01N21/41

CPC classification number: G01N21/41 ,  G01N2021/433 ,  G01N2021/438

Abstract: An optical detection system for measuring a refractive index of a liquid analyte comprising a light transmitting assembly fiber, which includes a single-mode fiber, an optical fiber sensing module and a multi-mode fiber. The optical detection system is configured to emit a coherent light beam to one end of the assembly fiber; and a detector is configured to capture a specklegram from an exit end of the assembly fiber. When the optical detection system is in operation, the optical fiber sensing module is configured to be submerged into the liquid analyte. By analyzing the correlation between the specklegram corresponding to the liquid analyte and the reference specklegram, the refractive index of the liquid analyte can be obtained.

Abstract translation: 一种用于测量液体分析物的折射率的光学检测系统，包括包括单模光纤，光纤感测模块和多模光纤的光传输组件光纤。 光学检测系统被配置为向组装光纤的一端发射相干光束; 并且检测器被配置为从组装光纤的出口端捕获散斑。 当光学检测系统运行时，光纤传感模块被配置成浸没在液体分析物中。 通过分析对应于液体分析物的散斑图与参考散点图之间的相关性，可以获得液体分析物的折射率。

公开(公告)号：US20140352442A1

公开(公告)日：2014-12-04

申请号：US13907982

申请日：2013-06-03

Applicant: Macau University of Science and Technology

Inventor： Jianqing LI ,  Ben XU ,  Yuanyuan PAN

IPC: G01H9/00

CPC classification number: G01H9/004

Abstract: A vibration detection system comprises a light source, a biconical tapered fiber comprising a biconical fiber taper and a detector is disclosed. The emission light emitted by the light source is directed to the biconical tapered fiber in one side. A detector is coupled to the other end of the biconical tapered fiber to measure the intensity of the light passing through. When the biconical tapered fiber is exposed to an external vibration, the biconical fiber taper deforms and modulates the light intensity accordingly. The received signal is then fed to the microcomputer to determine the amplitude and frequency of the external vibration. A method of vibration detection is also disclosed.

Abstract translation: 公开了一种振动检测系统，包括光源，包括双锥形光纤锥形的锥形锥形光纤和检测器。 由光源发射的发射光在一侧被引导到双锥形锥形光纤。 检测器耦合到双锥形光纤的另一端以测量通过的光的强度。 当双锥锥形光纤暴露于外部振动时，双锥形光纤锥度相应地变形并调制光强度。 然后将接收到的信号馈送到微型计算机以确定外部振动的幅度和频率。 还公开了一种振动检测方法。