Improvement of range accuracy of range-gating laser radar using the centroid method

Zhang, Yong; Zhao, Yuan; Liu, Liping; He, Jia; Jin, Chenfei; Mi, Guangcan; Sun, Xiaobing

doi:10.1364/ao.49.000267

Cited by 16 publications

(6 citation statements)

References 9 publications

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“…Later a modified approach to change threshold to suppress noise [4]. In 2010, Zhang, et al, presented the centroid method in research of setting threshold to suppress background noise [5].…”

Section: Introductionmentioning

confidence: 99%

System gain optimization in direction detection lidar system

Zhao

et al. 2011

Optical Modeling and Performance Predictions V

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This paper presents an equivalent direct detection receiver model by statistical method which simplifies the random impulse responses of electrons counting of returned signal, background radiation and dark current as a Gaussian random process with high enough gain. An investigation based on Gaussian distribution of system output in ICCD scannerless range-gated Lidar system is conducted with the calculations of error probability, absolute error and relative error. As the unique manipulated variable, optimized system gains are calculated separately based on the Gaussian model of the random process to achieve the lowest error probability, the lowest absolute error and relative error. The simulations show that the values of optimized gains tend to increase along with the target distance, although the increasing speeds are different. To meet multiple requests, an evaluation model based on cost function is constructed with different weights. The simulation shows that the evaluation model is capable of setting optimized gains for different circumstances and the settings of the weights are vital to the performance of Lidar system.

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Section: Introductionmentioning

confidence: 99%

System gain optimization in direction detection lidar system

Zhao

et al. 2011

Optical Modeling and Performance Predictions V

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“…Depth resolution is one of the most critical issues of a lidar system [14][15][16][17][18][19][20][21] . In this Letter, we propose a threelaser-beam STIL system to improve the depth resolution of the STIL system.…”

mentioning

confidence: 99%

“…where I i is the gray value of the ith pixel. In general, we obtain the gray values and calculate the centroid on the time-resolved axis as the coordinate of the signal [19,20] :…”

mentioning

confidence: 99%

Depth resolution improvement of streak tube imaging lidar system using three laser beams

Chen

Fan

et al. 2018

Chin. Opt. Lett.

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The work proposes a three-laser-beam streak tube imaging lidar system. Besides the main measuring laser beam, the second beam is used to decrease the error of time synchronization. The third beam has n þ 0.5 pixels' difference compared to the main measuring beam on a CCD, and it is used to correct the error caused by CCD discrete sampling. A three-dimensional (3D) imaging experiment using this scheme is carried out with time bin size of 0.066 ns (i.e., corresponding to a distance of 9.9 mm). An image of a 3D model is obtained with the depth resolution of <2 mm, which corresponds to ∼0.2 pixel.

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“…Finally, a 3D image can be reconstructed from multiple pulses by scanning the scene with a 1D laser fan beam [1,[12][13][14] . Range accuracy is one of the most critical features of imaging lidar systems [15][16][17] . Gleckler et al have reported that the achievable range error for an STIL system can be estimated by [5,7,8,18]…”

mentioning

confidence: 99%

Effect of time bin size on accuracy of streak tube imaging lidar

Fan

Chen

et al. 2016

中国光学快报

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Streak tube imaging lidar (STIL) is an active imaging system that has a high range accuracy with the use of a pulsed laser transmitter and streak tube receiver to produce 3D range images. This work investigates the effect of the time bin size on the range accuracy of STIL systems based on the peak detection algorithm. The numerical simulation indicates that the time bin size has a significant effect on the range accuracy, resulting in a modified analytical estimate of the range error. An indoor experiment with a planar target is carried out to validate the theory that shows the linear relationship between the range error and the time bin size. Finer 3D depth images of a fist model are acquired by using a smaller time bin size and the best range error of 0.003 m is achieved with the optimal time bin size of 0.07 ns.

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Improvement of range accuracy of range-gating laser radar using the centroid method

Cited by 16 publications

References 9 publications

System gain optimization in direction detection lidar system

System gain optimization in direction detection lidar system

Depth resolution improvement of streak tube imaging lidar system using three laser beams

Effect of time bin size on accuracy of streak tube imaging lidar

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