Underwater pulsed laser range-gated imaging model and its effect on image degradation and restoration

2013 ◽  
Vol 53 (6) ◽  
pp. 061608 ◽  
Author(s):  
Huang Youwei ◽  
Cao Fengmei ◽  
Jin Weiqi ◽  
Qiu Su
Keyword(s):  
Pulsed Laser ◽  
Image Degradation ◽  
Laser Range ◽  
Imaging Model ◽  
Gated Imaging

Study of the Mode and Maximum Detecting Performance of Underwater Laser Range-Gated Imaging System

2011 ◽  
Vol 38 (1) ◽  
pp. 0109001
Author(s):  
韩宏伟 Han Hongwei ◽  
张晓晖 Zhang Xiaohui ◽  
葛卫龙 Ge Weilong
Keyword(s):  
Imaging System ◽  
Laser Range ◽  
Underwater Laser ◽  
Gated Imaging

Study on Back-Scattering Light Intensity in Airborne Laser Range-Gated Imaging

2015 ◽  
Vol 42 (1) ◽  
pp. 0113003 ◽  
Author(s):  
寇添 Kou Tian ◽  
王海晏 Wang Haiyan ◽  
王芳 Wang Fang ◽  
王领 Wang Ling
Keyword(s):  
Light Intensity ◽  
Laser Range ◽  
Airborne Laser ◽  
Back Scattering ◽  
Scattering Light ◽  
Gated Imaging

Scannerless imaging pulsed-laser range finding

2002 ◽  
Vol 4 (6) ◽  
pp. S337-S346 ◽  
Author(s):  
Heikki Ailisto ◽  
Veli Heikkinen ◽  
Risto Mitikka ◽  
Risto Myllyl  ◽  
Juha Kostamovaara ◽  
...  
Keyword(s):  
Pulsed Laser ◽  
Laser Range ◽  
Range Finding

scholarly journals Image contrast model of non-line-of-sight imaging based on laser range-gated imaging

2013 ◽  
Vol 53 (6) ◽  
pp. 061610 ◽  
Author(s):  
Kaida Xu ◽  
Weiqi Jin ◽  
Shenyou Zhao ◽  
Jing Liu ◽  
Hui Guo ◽  
...  
Keyword(s):  
Image Contrast ◽  
Line Of Sight ◽  
Contrast Model ◽  
Laser Range ◽  
Gated Imaging ◽  
Non Line Of Sight

scholarly journals Receiving Unit of a Precision Pulsed Laser Range Finder

2020 ◽  
Vol 23 (2) ◽  
pp. 73-81
Author(s):  
V. A. Golovkov ◽  
N. I. Potapova ◽  
P. N. Rudenko ◽  
B. G. Stradov ◽  
S. V. Teliatnikov
Keyword(s):  
False Alarm ◽  
Pulsed Laser ◽  
Target Range ◽  
Laser Range Finder ◽  
Range Finder ◽  
Laser Rangefinder ◽  
Range Estimation ◽  
Laser Range ◽  
Probability Of False Alarm ◽  
Pulsed Laser Rangefinder

Introduction. At present the most accurate estimate of ranges is specific to laser range finders using phase measuring techniques. Design of a pulsed laser range finder with short probe pulses enabling one to gain high resolution and accuracy of estimate of target range close to the phase range finders is the topical problem.Aim. Development of a receiving part of the pulsed laser rangefinder with precision characteristics; determination of the accuracy of the measurements; description of the hardware.Materials and methods. The construction of the receiving part of the precision pulsed laser rangefinder with a two-scale digital range estimation system implemented by counting clock generator pulses and an analog integrator that specifies the discrete range estimation was considered. Using the methods of mathematical statistics, the energy characteristics of the rangefinder were determined: the accuracy of the range estimation and the probability of false alarm were provided by the developed scheme. The hardware of the precision laser rangefinder was described.Results. The principles of implementation of the receiving part of the laser rangefinder with a two-scale digital system for estimating the distance to the object were given. The results of numerical simulation of rangefinder characteristics were obtained, confirming the accuracy of range estimation of the order of millimeters. In the implemented rangefinder scheme, the probability of false alarm was 10-4 during 200 s of observing signal and noise mixture. The hardware of the precision laser rangefinder with a digital two-scale range estimation was proposed.Conclusion. The implemented laser range finder approaches to the capabilities of phase laser rangefinders in terms of potential accuracy of distance up to millimeters, while implementing the specified parameter in rapidly changing phono-target environment. Using of short probing pulses with a duration of 10...20 ns allows one to achieve a resolution of up to 1.5 m. In contrast to the phase rangefinder the range can be estimated from a single probe pulse.

Checking the accuracy characteristics of pulsed laser range finders with fiber light guides

1983 ◽  
Vol 26 (9) ◽  
pp. 733-737
Author(s):  
V. P. Danil'chenko ◽  
V. A. Kashchei ◽  
L. A. Pospelov
Keyword(s):  
Pulsed Laser ◽  
Laser Range ◽  
Laser Range Finders ◽  
Light Guides

scholarly journals A JITTER DETECTION METHOD BASED ON THE INTEGRATION IMAGING MODEL

2020 ◽  
Vol V-3-2020 ◽  
pp. 709-715
Author(s):  
G. Ye ◽  
J. Pan ◽  
Y. Zhu ◽  
S. Jin
Keyword(s):  
Random Error ◽  
Detection Method ◽  
Image Space ◽  
Multispectral Images ◽  
Error Source ◽  
Image Degradation ◽  
Object Space ◽  
Imaging Model ◽  
The Relationship

Abstract. Satellite jitter is a random error source which leads to image degradation. This paper proposes a method to detect the time-variant jitter using multispectral images. In the method, multispectral images are adopted for their large overlap to obtain the parallax map. The imaging process is analyzed in details, and an integration imaging model is constructed, which takes fully into account the time-variant jitter property and builds the relationship between object space with image space. Besides, multispectral images of ZY-3 satellite were used for experiments, and results show that the presented method obtains the jitter curve with the error of amplitude, frequency and phase not more than 0.0591 px, 0.0006 Hz and 0.007 rad, respectively. Results demonstrate the performance of the presented method in jitter detection.

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