Shenzhen, China
Shenzhen, China

Shenzhen University is a public university established in 1983 located in Shenzhen, Guangdong, China. It is accredited by the State Council of the People's Republic of China and is funded by the Shenzhen government. The university took its first enrollment the same year at what Deng Xiaoping called "Shenzhen Speed". Wikipedia.


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Patent
Shenzhen University | Date: 2015-07-13

The present invention is applicable to the field of image processing technology, provides a three-dimensional facial reconstruction method and system comprising: arranging three-dimensional imaging units with the same configuration on both of left side and right side of a target human face; implementing binocular calibration to the three-dimensional imaging units; establishing a polynomial relation between 3D point cloud coordinates captured by the three-dimensional imaging units and corresponding phases according to a result of the binocular calibration and determining the transformation relation among the 3D point cloud coordinates captured by two three-dimensional imaging units; capturing image sequences on the left side and right side of the target human face by the three-dimensional imaging units to obtain absolute phases of the image sequences; mapping the absolute phases of the image sequences to the 3D point cloud coordinates by using the polynomial relationship; unifying the 3D point cloud coordinates of the three-dimensional imaging units to a global coordinate system according to the transformation relationship. The present invention implements a rapid three-dimensional reconstruction of a face and improves the processing efficiency of three-dimensional facial reconstruction.


Patent
Shenzhen University | Date: 2016-03-02

The present invention relates to the field of laser frequency-mixing technologies, and in particular, to an all-fiber laser frequency mixer and a frequency-mixing fiber laser thereof. In the all-fiber laser frequency mixer and the frequency-mixing fiber laser thereof, a graded index fiber coupling technology is used to implement an all-fiber laser frequency mixer, and the all-fiber laser frequency mixer is further combined with a fiber laser to implement an all-fiber frequency-mixing fiber laser. The apparatus can implement all-fiber frequency doubling, sum frequency or difference frequency on any one or two of the following linearly polarized narrow linewidth fiber lasers: a 1 m fiber laser, a 1.5 m fiber laser, a 1.9 m thulium-doped fiber laser, a 2 m thulium holmium co-doped fiber laser, a Raman fiber laser, and a frequency-mixing fiber laser and implement an all-fiber fiber laser covering ultraviolet, visible, near-infrared, mid-infrared bands.


Patent
Shenzhen University | Date: 2016-02-03

The present invention discloses an LED lamp, which includes an LED light source module including at least one group of LED light source components, and further includes three drive circuits and a control circuit. The LED light source components include a first, a second, and a third LED light source. The first light source includes a first blue LED chip, a green phosphor is coated on the first blue LED chip. The second light source includes a second blue LED chip, a yellow phosphor is coated on the second blue LED chip. The third light source includes a third red LED chip. The control circuit determines drive currents of various LED light sources and drives the LED light sources through the drive circuits.


Patent
Shenzhen University | Date: 2016-01-20

A mechanically rotating intravascular ultrasound probe relates to the technical field of medical devices, and aims to provide a forward-looking mechanically rotating intravascular ultrasound probe having a small volume, a high image resolution and good imaging stability. The intravascular ultrasound probe includes a catheter (1), an ultrasonic transducer (4) disposed at a front end of a cavity of the catheter (1) and a driving apparatus that drives the ultrasonic transducer (4) to rotate mechanically. The driving apparatus is a micro motor (3) disposed in the cavity of the catheter (1), including a rotor (31) and a stator (32). The ultrasonic transducer (4) is installed on top of the rotor (31) and electrically connected to the rotor (31), and the rotor (31) is also electrically connected to the stator (32); the catheter (1) is a magnetic metal tube, and a front end thereof is enclosed by an acoustic window (2) which has a spherical tip and allows ultrasonic waves of the ultrasonic transducer (4) to pass through; the acoustic window (2) is filled with an ionic liquid having a function of a ultrasonic coupling agent. The ultrasound probe solves a problem of rotation torsion of an image when the catheter (1) passes through a lesion with high-grade stenosis or a curved blood vessel section, and achieves forward scanning imaging and side scanning imaging for a blood vessel wall.


Patent
Shenzhen University | Date: 2016-08-22

The present disclosure relates to the field of shape memory materials, it discloses a betaine-based shape memory polymer and the preparation method thereof. The polymer is formed through free radical polymerization of an unsaturated betaine monomer, an acrylic monomer, and an ethylene glycol divinyl ether monomer with the addition of an initiator. The betaine-based shape memory polymer has thermosensitive shape memory property and wet sensitive shape memory property, and it has good biocompatibility and an excellent shape memory property, antibacterial property. It is of great potential for use in engineering, construction, daily life and medical service.


Patent
Shenzhen University | Date: 2016-04-27

The present invention is suitable for the technical field of sensing, and provides an sensor based on laser, comprising a pump source, a common section, a reference section and a detection section, the common section is provided with a gain medium, and the detection section is provided with a sensing element capable of causing an optical path difference; the reference section and the detection section is connected to the common section though a first polarization splitting unit and a second polarization splitting unit; the common section is provided with an output unit or each of the reference section and the detection is provided with the output unit, the output unit is connected to a photoelectric detector through a light uniting unit; a polarization rotation unit is disposed between the light uniting unit and the output unit. In the present invention, a heterodyne interference is generated by the two lasers with different frequency, the amounts of physical quantities are determined by detecting the frequency difference; and because the frequencies of the laser oscillations are sensitive to the changes of the optical paths in the resonators, the sensitivity and accuracy of the sensor are high, and the two resonators of the sensor have common optical path, such that the sensor has good anti-jamming capacity and is suitable for measuring the small changes in a variety of physical quantities.


Patent
Shenzhen University | Date: 2016-04-27

The present invention is suitable for the technical field of sensing, and provides a ring laser sensor comprising a pump source, a common section, and a reference section and a detection section, the common section is provided with a gain medium, the common section and the reference section form a first ring laser resonator, and the common section and the detection section form a second ring laser resonator, lasers are transmitted oppositely in the first ring laser resonator and the second ring laser resonator, the detection section is provided with a sensing element capable of causing an optical path difference; the common section is provided with an output unit or each of the reference section and the detection is provided with the output unit, the output unit is connected to a photoelectric detector through a light uniting unit. In the present invention, two ring laser resonators with opposite transmission directions is provided, the detection section is provided with the sensing element, and because the frequencies of the laser are sensitive to the changes of the optical paths in the resonators, the sensitivity and accuracy of the sensor are high, and the two resonators of the sensor have common optical path, such that the sensor has good anti jamming capacity and is suitable for measuring the small changes in a variety of physical quantities.


The present application relates to the technical field of ultrafast imaging, and provides an ultrafast framing optical imaging device with a real-time high spatial resolution. The optical imaging device includes an ultrashort pulse laser system with a magnitude of femtosecond, a frequency multiplier, a wavelength splitter, a continuous illumination laser, a sampling plate, a calibration camera, a first imaging record module, and a second imaging record module. The present application mainly utilizes continuous light illumination ultrafast events and non-collinear light parameter amplifying technology that uses ultrashort pulse laser to pump/sample events at different moments, and adopts a plurality of CCD cameras to receive corresponding idle light images simultaneously and respectively and thereby realize ultrafast framing optical imaging with a high time resolution.


Patent
Shenzhen University | Date: 2016-02-24

A calibration method is described for a telecentric imaging 3D shape measurement system, including step S1: establishing a telecentric 3D shape measurement system; S2: controlling a telecentric projection equipment to project a sinusoidal fringe pattern to a translation stage, and collecting the sinusoidal fringe pattern by a telecentric camera equipment; moving the translation stage to different depth, then obtaining absolute phase values of a pixel for calibration by a phase-shifting method; and conducting linear fitting on the series of absolute phase values of the pixel and the corresponding depths to obtain a phase-depth conversion of the measurement system; and S3: transforming pixel coordinates on the image plane of the telecentric camera equipment into world coordinates through calibrating parameters of the telecentric camera equipment. A relationship between phase and depth herein is linear, and only needs to calibrate the linearity of one pixel. Therefore, the phase-depth calibration is of small complexity, high precision, good operability and strong practical applicability. Moreover, an orthographic transformation model of camera with bilateral telecentric lens is provided, which simplifies the calibration process.


Patent
Shenzhen University | Date: 2016-04-28

The present invention provides a highly robust mark point decoding method and system. The decoding method comprises the following steps: step A, estimating a homography matrix and converting perspective projection images of mark points into orthographic projection images; step B, traversing coding segments of the mark points images in a polar coordinate system to obtain a pixel value in a cartesian coordinate system corresponding to each point, and determining the length of each coding segment and the code value thereof in a binary coding sequence, so as to determine the number of code value bits of each coding segment in the binary coding sequence to form a binary coding sequence; step C, performing cyclic shifting on the binary coding sequence, and converting each cyclic-shifted sequence into a decimal coded value, and marking the minimum decimal coded value as a coded value of the mark point.

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