New method of echo detection for diffuse reflection laser ranging

A new method of real-time signal extraction for diffuse reflection laser ranging based on Genetic Algorithm

10.1117/12.2197435 ◽

2015 ◽

Author(s):

Peng Zhao ◽

Yan Zhang ◽

Weiping Qian

Keyword(s):

Genetic Algorithm ◽

Real Time ◽

Diffuse Reflection ◽

New Method ◽

Signal Extraction ◽

Time Signal ◽

Laser Ranging

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Experimentation of Diffuse Reflection Laser Ranging of Space Debris

Chinese Journal of Lasers ◽

10.3788/cjl201138.0908001 ◽

2011 ◽

Vol 38 (9) ◽

pp. 0908001 ◽

Cited By ~ 3

Author(s):

李语强 Li Yuqiang ◽

李祝莲 Li Zhulian ◽

伏红林 Fu Honglin ◽

郑向明 Zheng Xiangming ◽

何少辉 He Shaohui ◽

...

Keyword(s):

Space Debris ◽

Diffuse Reflection ◽

Laser Ranging

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Tumbling Motion Estimation of Rocket Body Based on Diffuse Reflection Laser Ranging

Chinese Journal of Lasers ◽

10.3788/cjl201946.0104007 ◽

2019 ◽

Vol 46 (1) ◽

pp. 0104007

Author(s):

刘通 Liu Tong ◽

沈鸣 Shen Ming ◽

高鹏骐 Gao Pengqi ◽

赵有 ZhaoYou

Keyword(s):

Motion Estimation ◽

Diffuse Reflection ◽

Laser Ranging ◽

Tumbling Motion

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High precision multi-pulse laser ranging echo detection technology

Journal of Applied Optics ◽

10.5768/jao201839.0107001 ◽

2018 ◽

Vol 39 (1) ◽

pp. 130-133

Author(s):

Gao Wei ◽

Ma Shiwei ◽

Duan Yuanyuan

Keyword(s):

Pulse Laser ◽

High Precision ◽

Laser Ranging ◽

Detection Technology ◽

Echo Detection

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A New Method of Measuring Retinal Vessel Diameters from Fundus Photographs Based on Retinal Structure and Light Reflection

10.36227/techrxiv.16726555 ◽

2021 ◽

Author(s):

Satoshi Wakebe ◽

Kotaro Yamasue ◽

Hidetoshi Itoh

Keyword(s):

Blood Vessel ◽

Diffuse Reflection ◽

Repeated Measurement ◽

New Method ◽

Dimensional Structure ◽

Cylindrical Shape ◽

Reflection Model ◽

Luminance Profile ◽

Fundus Photographs ◽

Minimum Points

<p>We propose a new method and software for measuring blood vessel diameters from fundus photographs. In this method the edge of the blood vessel is the two minimum points in the luminance profile and diameter is distance between minimum points. We noticed the relation between W-shape of luminance profile at blood vessel transversal line and cylindrical shape, and analyzed the validity of this method using the diffuse reflection model of a cylinder shape based on the optics. The simulation image by the diffuse reflection model of the cylinder was similar to that of the blood vessel images. A newly developed software using the minimum points can measure repeated measurement in a series of photographs at the same point of the same person. The data of the repeated measurement of each person showed stability, and the coefficient of variation showed no affection of different diameter and arteriovenous distinction. Hence, we believe that the minimum points are valid as blood vessel edges. The software that measures these blood vessel edges has an extremely simple measurement procedure, possesses few errors, and is easy to automate. This method is relevant because the central reflex, which has not been utilized previously, optically represents the cylindrical three-dimensional structure of blood vessels.</p><div><div> </div> </div>

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A New Method of Measuring Retinal Vessel Diameters from Fundus Photographs Based on Retinal Structure and Light Reflection

10.36227/techrxiv.16726555.v1 ◽

2021 ◽

Author(s):

Satoshi Wakebe ◽

Kotaro Yamasue ◽

Hidetoshi Itoh

Keyword(s):

Blood Vessel ◽

Diffuse Reflection ◽

Repeated Measurement ◽

New Method ◽

Dimensional Structure ◽

Cylindrical Shape ◽

Reflection Model ◽

Luminance Profile ◽

Fundus Photographs ◽

Minimum Points

<p>We propose a new method and software for measuring blood vessel diameters from fundus photographs. In this method the edge of the blood vessel is the two minimum points in the luminance profile and diameter is distance between minimum points. We noticed the relation between W-shape of luminance profile at blood vessel transversal line and cylindrical shape, and analyzed the validity of this method using the diffuse reflection model of a cylinder shape based on the optics. The simulation image by the diffuse reflection model of the cylinder was similar to that of the blood vessel images. A newly developed software using the minimum points can measure repeated measurement in a series of photographs at the same point of the same person. The data of the repeated measurement of each person showed stability, and the coefficient of variation showed no affection of different diameter and arteriovenous distinction. Hence, we believe that the minimum points are valid as blood vessel edges. The software that measures these blood vessel edges has an extremely simple measurement procedure, possesses few errors, and is easy to automate. This method is relevant because the central reflex, which has not been utilized previously, optically represents the cylindrical three-dimensional structure of blood vessels.</p><div><div> </div> </div>

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Relations of the Laser Intensity Value, the Laser Ranging Value and the Laser Incident Angle

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.239-240.198 ◽

2012 ◽

Vol 239-240 ◽

pp. 198-201

Author(s):

Xiao Jun Cheng ◽

Kai Tan ◽

Qi Ye Lou

Keyword(s):

Experimental Data ◽

Laser Intensity ◽

Incidence Angle ◽

Incident Angle ◽

New Method ◽

Theoretical Formula ◽

Laser Ranging ◽

Target Classification ◽

Functional Relationships ◽

Work Done

Firstly, the functional relationships of the laser intensity value, the target reflectance, the laser ranging value and the laser incidence angle was derived theoretically in this paper, and a new method of target classification based on the laser intensity value and the target reflectance was proposed. Then, the experimental data was analyzed to verify the correctness of the theoretical formula. Finally, the work done in this paper was summarized.

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