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COMPARISON WITH ACCURACY OF TERRESTRIAL LASER SCANNER BY USING POINT CLOUD ALIGNED WITH SHAPE MATCHING AND BEST FITTING METHODS
laser scanning time of flight phase shift shape matching natural distributions Ostia
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2019/3/4
Recently operation systems of laser scanning have been obviously improved; for instance shape matching has been equipped with software on a post processing stage so measurement without any targets is ...
AUTOMATIC MATCHING OF LARGE SCALE IMAGES AND TERRESTRIAL LIDAR BASED ON APP SYNERGY OF MOBILE PHONE
Mobile phone APP Images Laser Point Cloud Matching
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2018/5/16
The digitalization of Cultural Heritage based on ground laser scanning technology has been widely applied. High-precision scanning and high-resolution photography of cultural relics are the main metho...
FEATURE MATCHING OF HISTORICAL IMAGES BASED ON GEOMETRY OF QUADRILATERALS
historical images image orientation feature matching descriptor matching quadrilaterals geometry
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2018/6/4
This contribution shows an approach to match historical images from the photo library of the Saxon State and University Library Dresden (SLUB) in the context of a historical three-dimensional city mod...
matching topographic surfaces by retrieving and modeling 3d discrepancies. application to lidar data and photogrammetric surfaces
Lidar 3D registration robust estimation matching data fusion DSM
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2015/9/1
If photogrammetry has been used for a long time to describe the topography, airborne laser systems are nowadays well-known to provide an accurate representation of terrestrial landscapes through irreg...
HIGH QUALITY DEMS FOR GLACIER MONITORING –IMAGE MATCHING VERSUS LASER SCANNING
Glaciology Matching Laser Scanning DEM/DTM Comparison
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2015/7/29
Glacier monitoring is of great importance since glaciers are influencing essential areas of life like water supply, energy production,
flood protection and tourism. Furthermore, the variation of gla...
A comparison of semiglobal and local dense matching algorithms for surface reconstruction
DSM Accuracy Matching Reconstruction Comparison Algorithms
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2014/7/30
Encouraged by the growing interest in automatic 3D image-based reconstruction, the development and improvement of robust stereo matching techniques is one of the most investigated research topic of th...
Phase-Matching and Parametric Conversion for the Mid-Infrared in As2S3 Waveguides
As2S3 Mid-Infrared Phase-Matching Four-Wave Mixing
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2013/1/30
We illustrate two As2S3 waveguide designs for four-wave mixing, which can generate 3.03 μm mid-infrared light from a 1.55 μm near-infrared signal source and a 2.05 μm pump source. Through simulations,...
APPLYING 3D AFFINE TRANSFORMATION AND LEAST SQUARES MATCHING FOR AIRBORNE LASER SCANNING STRIPS ADJUSTMENT WITHOUT GNSS/IMU TRAJECTORY DATA
Airborne Laser Scanning adjustment LIDAR georeferencing quality control
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2014/6/5
In this article we extend our previous work on the topic of ALS strip adjustment without GNSS/IMU trajectory data. Between overlap- ping strip pairs the relative orientation as a 3D affine trans...
Tunable DWDM XFP with an External Cavity Laser Transmitter and Transmission Performance Matching 300-Pin Transponders
Diode lasers Fiber optics sources detectors
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2015/6/8
A full C-Band tunable 10G DWDM XFP using external cavity laser (ECL)technology is presented. Using this approach, we demonstrate performance on par with traditional 300-pin transponders, enabling the ...
Design of single-polarization single-mode photonic crystal fiber based on index-matching coupling
Fiber design and fabrications Photonic crystal fiber
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2015/6/4
We propose a new design to achieve single-polarization single-mode guidance in highly birefringent photonic crystal fiber. The suppression of unwanted polarization state is realized by introducing ind...
Femtosecond Cascaded Second-Order Nonlinearities in Quasi-Phase-Matching Devices
Frequency conversions Cascaded second-order nonlinearities Optical solitons
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2009/6/8
Cascaded processes of energy exchanges between optical beams via second-order nonlinearities lead to various phenomena, including Kerr-like nonlinear phase shifts and optical solitons. The cascading n...
High-Efficiency Intracavity Continuous-Wave Green-Light Generation by Quasiphase Matching in a Bulk Periodically Poled MgO:LiNbO3 Crystal
Quasiphase Matching LiNbO3 Crystal
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2008/10/31
908 mW of green light at 532 nm were generated by intracavity quasiphase matching in a bulk periodically poled MgO:LiNbO3 (PPMgLN) crystal. A maximum optical-to-optical conversion efficien...