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| 1 | High-speed and high-efficiency three-dimensional shape measurement based on Gray-coded light显示文摘Fringe projection profilometry has been increasingly sought and applied in dynamic three dimensional(3D)shape measurement.In this work,a robust,high-efficiency 3D measurement based on Gray-coded light is proposed.Unlike the traditional method,a tripartite phase unwrapping method is proposed to avoid the jump errors on the boundary of code words,which are mainly caused by the defocusing of the projector and the motion of the tested object.Subsequently,the time overlapping coding strategy is presented to greatly increase the coding ef-ficiency,decreasing the projected number in each group from seven(i.e.,3+4)to four(i.e.,3+1)for one restored 3D frame.The combination of two proposed techniques allows the reconstruction of a pixel-wise and unambiguous 3D geometry of dynamic scenes with strong noise using every four projected patterns.To the best of our knowledge,the presented techniques for the first time preserve the high anti-noise ability of a method based on the Gray code while overcoming the drawbacks of jump errors and low coding efficiency.Experiments have demonstrated that the proposed method can achieve robust,high efficiency 3D shape measurement of high speed dynamic scenes even polluted by strong noise. | ZHOUJIE WU WENBO GUO YUEYANG LI YIHANG LIU QICAN ZHANG | 2020 | Photonics Research2020，8，6： | 17 |
| 2 | Superfast and large-depth-range sinusoidal fringe generation for multi-dimensional information sensing显示文摘Among many multi-dimensional information sensing methods such as structured-light and single-pixel imaging technologies, sinusoidal fringe generation is general and crucial. Current methods of sinusoidal fringe generation force concessions in either the speed or the depth range. To mitigate this trade-off, we have simultaneously achieved both speed breakthrough and depth range enhancement by improving both the optical projection system and binary coding algorithm based on an off-the-shelf projector. Specifically, we propose a multifocal projection system and oblique projection method, which essentially eliminates the existence of a single focal plane in the conventional axisymmetric system and utilizes its anisotropy characteristics to achieve a superior filtering effect. Furthermore, the optimal pulse width modulation technique is introduced to modulate the square binary pattern for eliminating specific harmonics. To the best of our knowledge, the proposed method, for the first time,simultaneously achieved superfast(9524 frames per second) and large-depth-range(560 mm, about three times that of the conventional method) sinusoidal fringe generation with consistently high accuracy. Experimental results demonstrate the superior performance of the proposed method in multi-dimensional information sensing such as 3D, 4D, and [x, y, z, t;s(strain)]. | SIJIE ZHU ZHOUJIE WU JING ZHANG QICAN ZHANG YAJUN WANG | 2022 | Photonics Research2022，10，11： | 3 |
| 3 | Dynamic 3-D shape measurement method: A review显示文摘 | Xianyu Su Qican Zhang | 2010 | Optics and Lasers in Engineering2010，48，2： | 1 |
| 4 | An Optical Real-time 3-D Measurement for Analysis of Facial Shape and Movement 显示文摘 | ZHANG Qican SU Xianyu CHEN Wenjing | 2003 | SPIE2003，5254，： | 1 |
| 5 | Local stereo matching with adaptive support-weight, rank transform and disparity calibration 显示文摘 | Zheng Gu Xianyu Su Yuankun Liu Qican Zhang | 2008 | Pattern Recognition Letters2008，29，9： | 1 |
| 6 | Dynamic 3 - D shape measurement method: A review显示文摘 | Xanyu Su Qican Zhang | 2009 | Optics and Lasers in Engineefing2009，，10： | 1 |
| 7 | Dynamic 3-D shape meas urement method: A review显示文摘 | Xianyu Su Qican Zhang | 2010 | Optics and Lasers in Engineering2010，48，2： | 1 |
| 8 | 3-D shape measurement based on complementary Gray-code light显示文摘 | Qican Zhang Xianyu Su Liqun Xiang Xuezhen Sun | 2011 | Optics and Lasers in Engineering2011，，4： | 1 |
| 9 | An optical 3-D shape and deformation measurement for rotating blade using stroboscopic structured illumination 显示文摘 | Zhang Qican Su Xianyu Cao Yiping | 2005 | Optical Engineering2005，44，11： | 1 |
| 10 | High-speed optical meas urement for the drumhead vibration显示文摘 | Zhang Qican Su Xianyu | 2005 | Optics Express2005，13，8： | 1 |
| 11 | High-speed optical measurement for the drumhead vibration 显示文摘 | Qican Zhang Xianyu Su | 2005 | Opt Express2005，13，8： | 1 |
| 12 | Dynamic 3D shape measurement: a review显示文摘 | Xianyu Su Qican Zhang | 2010 | Opt & Lasers in Eng2010，48，2： | 1 |
| 13 | High-speed optical measurement for the drumhead vibration显示文摘 | Zhang Qican Su Xianyu | 2005 | Optics Express2005，13，8： | 1 |
| 14 | Three-dimensional shape measurement for an underwater object based on two- dimensional grating pattern projection 显示文摘 | Zhang Qican Wang Qingfeng Hou Zhiling | 2011 | Optics & Laser Technology2011，43，： | 1 |
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