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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：An active contour model with local variance force term and its efficient minimization solver for multi-phase image
局部方差力项 活动轮廓模型 多相图像 最小化求解器
2023/5/8
In this work, we propose an active contour model with a local variance force (LVF) term that can be applied to multi-phase image segmentation problems. With the LVF, the proposed model is very effecti...
DENOISING POINT CLOUD DATA OF SMALL-STRUCTURED FREE FORMSURFACES CAPTURED BY A PHASE-BASED LASERSCANNER
Laser scanning Close-range Point Cloud Filtering Cultural Heritage
2016/2/29
Terrestrial laser scanners based on the time-of-flight measurement principle or the phase comparison method are used for cultural
heritage documentation. Only if the scanned surfaces consist of exte...
Iran SDI Initiative: Study Phase of NSDI
National Spatial Data Infrastructure Iran Study Phase
2015/12/11
In Iran, development of National SDI (NSDI) was formally started from 2005, according to the law of "the fourth economic, social, and cultural development plan (2005-2009)", enacted by parliament in 2...
High Integrity Carrier Phase Navigation for Future LAAS Using Multiple Civilian GPS Signals
High Integrity Carrier Phase Navigation LAAS Multiple Civilian GPS Signals
2015/6/29
In near future, there will be two more civilian GPS signals,at 1227.60 MHz and 1176.45 MHz, in addition to thepresent one at 1575.42 MHz. Of many possible benefits from the three civilian signal...
Analysis of Carrier Phase and Group Delay Biases Introduced by CRPA Hardware
Carrier Phase Group Delay Biases Introduced CRPA Hardware
2015/6/26
The benefits afforded by Controlled Reception Pattern Antennas (CRPAs) in multipath and interference mitigation are well documented, and they find use in many applications today. As such, CRPAs are be...
Phase Retrieval via Matrix Completion
Diffraction Fourier transform convex optimization trace-norm minimization
2015/6/17
This paper develops a novel framework for phase retrieval, a problem which arises in X-ray crystallography, diffraction imaging, astronomical imaging and many other applications. Our approach, called ...
Phase Retrieval from Coded Diffraction Patterns
Phase Retrieval Coded Diffraction Patterns
2015/6/17
This paper considers the question of recovering the phase of an object from intensity-only measurements, a problem which naturally appears in X-ray crystallography and related disciplines. We study a ...
Phase Retrieval via Wirtinger Flow:Theory and Algorithms
Phase Retrieval Wirtinger Flow Theory Algorithms
2015/6/17
We study the problem of recovering the phase from magnitude measurements; specifically, we wish to reconstruct a complex-valued signal x ∈ Cn about which we have phaseless samples of the form yr = ∣&#...
3-D synthetic aperture radar interferometry phase unwrapping using extended Kalman filters
3-D synthetic aperture radar interferometry phase unwrapping extended Kalman filters
2014/4/22
Synthetic Aperture Radar Interferometry (InSAR) observations allow researchers to map elevations, analyze surface deformation, and even detect ground water level changes from satellites orbiting the E...
Enhanced reflection via phase compensation from anomalous dispersion in atomic vapor
Enhanced reflection phase compensation anomalous dispersion atomic vapor
2014/5/28
The phase compensation mechanism induced by anomalous dispersion in the reflection process of four-wave mixing (or reflection from a grating) in a three-level system is investigated, where the four wa...
A Two-Phase Spectral Bigraph Co-clustering Approach for the 'Who Rated What' Task
Two-Phase Spectral Bigraph Co-clustering Approach the 'Who Rated What' Task
2010/12/17
This paper describes our approach for the “Who Rated What” task in KDD Cup 2007 competition. Given the Netflix data set that consists of more than 100 million ratings between 1998 and 2005, this task ...