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Feature detection and description for image matching:from hand-crafted design to deep learning

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Geo-Spatial Information Science 2021年第1期24卷 58-74,I0009页

作者： Lin Chen Franz Rottensteiner christian Heipke Institute of Photogrammetry and GeoInformation(IPI) Leibniz Universität HannoverHannoverGermany

In feature based image matching,distinctive features in images are detected and represented by feature *** is then carried out by assessing the similarity of the descriptors of potentially conjugate *** this paper,we first shortly discuss the general ***,we review feature detection as well as the determination of affine shape and orientation of local features,before analyzing feature description in more *** the feature description review,the general framework of local feature description is presented ***,the review discusses the evolution from hand-crafted feature descriptors,***(Scale Invariant Feature Transform),to machine learning and deep learning based *** machine learning models,the training loss and the respective training data of learning-based algorithms are looked at in more detail;subsequently the various advantages and challenges of the different approaches are ***,we present and assess some current research directions before concluding the paper.

关键词： Image matching affine shape estimation feature orientation descriptor learning image orientation

Plasma Membrane Protein Ubiquitylation and Degradation as Determinants of Positional Growth in Plants

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Journal of Integrative Plant Biology 2013年第9期55卷 809-823页

作者： Barbara Korbei christian Luschnig Department of Applied Genetics and Cell Biology University of Natural Resources and Life SciencesVienna (BOKU)Muthgasse 181190 Vienna Austria

Being sessile organisms, plants evolved an unparalleled plasticity in their post-embryonic development, allowing them to adapt and fine-tune their vital parameters to an ever-changing environment. Cross-talk between plants and their environment requires tight regulation of information exchange at the plasma membrane （PM）. Plasma membrane proteins mediate such communication, by sensing variations in nutrient availability, external cues as well as by controlled solute transport across the membrane border. Localiza-tion and steady-state levels are essential for PM protein function and ongoing research identified cis- and trans-acting determinants, involved in control of plant PM protein localization and turnover. In this overview, we summarize recent progress in our understanding of plant PM protein sorting and degradation via ubiquitylation, a post-translational and reversible modification of proteins. We highlight characterized components of the machinery involved in sorting of ubiquitylated PM proteins and discuss consequences of protein ubiquitylation on fate of selected PM proteins. Specifically, we focus on the role of ubiquitylation and PM protein degradation in the regulation of polar auxin transport （PAT）. We combine this regulatory circuit with further aspects of PM protein sorting control, to address the interplay of events that might control PAT and polarized growth in higher plants.

关键词： Arabidopsis auxin PIN protein protein degradation ubiquitin.

Recovering Navier–Stokes Equations from Asymptotic Limits of the Boltzmann Gas Mixture Equation

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Communications in Theoretical Physics 2016年第5期65卷 553-562页

作者： Carlo Bianca christian Dogbe Laboratoire de Physique Statistique Ecole Normale Superieure PSL Research University University Paris Diderot Sorbonne Paris-Cite Sorbonne Universites UPMC Univ Paris 06 CNRS Department of Mathematics Universite de Caen Normandie LMNOCNRS

This paper is devoted to the derivation of macroscopic fluid dynamics from the Boltzmann mesoscopic dynamics of a binary mixture of hard-sphere gas *** the hydrodynamics limit is performed by employing different time and space *** paper shows that,depending on the magnitude of the parameters which define the scaling,the macroscopic quantities(number density,mean velocity and local temperature)are solutions of the acoustic equation,the linear incompressible Euler equation and the incompressible Navier–Stokes *** derivation is formally tackled by the recent moment method proposed by[***,et al.,***.63(1991)323]and the results generalize the analysis performed in[***,et al.,*** ***.29(2015)240].

关键词： gas mixtures hydrodynamic limit asymptotic limit fluid equation conservation law

Classification of discrete equations linearizable by point transformation on a square lattice

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Frontiers of Mathematics in China 2013年第5期8卷 1067-1076页

作者： christian SCIMITERNA Decio LEVI Dipartimento di Ingegneria Elettronica Universita degli Studi Roma Tre and INFN Sezionedi Roma Tre Via della Vasca Navale 84 00146 Roma Italy

We provide a complete set of linearizability conditions for nonlinear partial difference equations defined on four points and, using them, we classify all linearizable multilinear partial difference equations defined ... 详细信息

关键词： Partial difference equation linearizable equation point transformation

Gottfried Konecny:From draftsman to Professor emeritus-75 years of involvement in photogrammetry and remote sensing

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Geo-Spatial Information Science 2021年第1期24卷 1-4,I0001页

作者： christian Heipke Deren Li Institute of Photogrammetry and GeoInformation(IPI) Leibniz University HannoverHannoverGermany State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina

This special issue is dedicated to *** Konecny(see Figure 1),the former president of the International Society for Photogrammetry and Remote Sensing(ISPRS)on the occasion of his 90th birthday,which he celebrated in good health and spirits in June 2020(see Figure 2).A visionary leader and missionary of global topographic mapping,a world scientist and a world citizen who restlessly built and continues to build sustainable bridges between different generations and different peoples of the globe and a true pioneer of photogrammetry and remote sensing,Konecny has shaped our field of research and development over the last 75 years in ways second to *** also has a very special connection to China,which prompted the Editor-in-Chief of Geo-spatial Information Science to suggest this journal as a very good place to publish this special *** the successor of *** at the Institute of Photogrammetry and GeoInformation of Leibniz University Hannover,it is with great honor,joy and thankfulness that christian Heipke accepted the invitation to be guest editor of this special issue,together with Deren Li.

关键词： gramme Figure involvement

RELAXATION SOLVERS FOR IDEAL MHD EQUATIONS-A REVIEW

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Acta Mathematica Scientia 2010年第2期30卷 621-632页

作者： christian Klingenberg Knut Waagan Departement of Mathematics Würzburg University The University of Maryland CSCAMM4146 CSIC Building#406 Paint Branch DriveCollege Park MD 20742-3289USA

We have developed approximate Riemann solvers for ideal MHD equations based on a relaxation approach in [4], [5]. These lead to entropy consistent solutions with good properties like guaranteed positive density. We describe the extension to higher order and multiple space dimensions. Finally we show our implementation of all this into the astrophysics code FLASH.

关键词： conservation laws ideal magnetohydrodynamics finite volume schemes en-tropy stable schemes positive schemes

Investigating Energy Prosumer Behaviour in Crowd Energy Using an Interactive Model/Diorama

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Journal of Electronic Science and Technology 2018年第4期16卷 341-350页

作者： christian Ritzel Anton Sentic the international institute of management in technology University of Fribourg Fribourg 1700Switzerland

Smart living labs such as the one located in Fribourg(Switzerland) focus on improving wellbeing and furthering knowledge related to building the district of the future on a technical and social level. Therefore, smart living labs represent an experimental platform/space where sustainable production and consumption strategies can be tested in a protected environment. A significant change in the socioeconomic production and consumption sphere can be expected by the rise of the so-called energy prosumer. Accordingly, this article presents an interactive model for the experimental investigation of energy prosumer behavior. In this context, two potential experiments on investment and trade decisions are briefly outlined. Since(behavioral and economic) experiments are usually conducted under controlled conditions in experimental labs involving mainly undergraduate students, the presented interactive model is flexible and mobile, providing the advantage to conduct experiments nearly everywhere involving everyday citizens.

关键词： Crowd energy decentralised energy systems experiments prosumers smart grid

Endoscopic transpapillary brush cytology and forceps biopsy in patients with hilar cholangiocarcinoma

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World Journal of Gastroenterology 2008年第7期14卷 1097-1101页

作者： Andreas Weber Claus von Weyhern Falko Fend Jochen Schneider Bruno Neu Alexander Meining Hans Weidenbach Roland M Schmid christian.prinz Department of Internal Medicine Ⅱ Technical University of Munich Munich 81675 Germany Department of Pathology Technical University of Munich Munich 81675 Germany

AIM: To evaluate the sensitivity of brush cytology and forceps biopsy in a homogeneous patient group with hilar ***: Brush cytology and forceps biopsy were routinely performed in patients with suspected malignant biliary strictures. Fifty-eight consecutive patients undergoing endoscopic retrograde cholangio-pancreatography (ERCP) including forceps biopsy and brush cytology in patients with hilar cholangiocarcinoma between ***: Positive results for malignancy were obtained in 24/58 patients (41.4%) by brush cytology and in 31/58 patients (53.4%) by forceps biopsy. The combination of both techniques brush cytology and forceps biopsy resulted only in a minor increase in diagnostic sensitivity to 60.3% (35/58 patients). In 20/58 patients (34.5%), diagnosis were obtained by both positive cytology and positive histology, in 11/58 (19%) by positive histology (negative cytology) and only 4/58 patients (6.9%) were confirmed by positive cytology (negative histology).CONCLUSION: Brush cytology and forceps biopsy have only limited sensitivity for the diagnosis of malignant hilar tumors. In our eyes, additional diagnostic techniques should be evaluated and should become routine in patients with negative cytological and histological findings.

关键词： Brush cytology Forceps biopsy Cholangiocarcinoma Klatskin tumor Endoscopy Diagnostic approaches

Single-mode and tunable VCSELs in the near-to mid-infrared Invited Paper

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Chinese Optics Letters 2008年第10期6卷 743-747页

作者： Markus-christian Amann Werner Hofmann Walter Schottky Institut Technische Universitt MnchenD-85748 GarchingGermany

Single-mode, long-wavelength vertical-cavity surface-emitting lasers （VCSELs） in the near- to mid-infrared covering the wavelength range from 1.3 to 2.3 μm are presented. This wide spectral emission range opens applications in gas sensing and optical interconnects. All these lasers are monolithically grown in the InGaAlAs-InP material system utilizing a buried tunnel junction （BTJ） as current aperture. Fabricated with a novel high-speed design with reduced parasitics, bandwidths in excess of 10 GHz at 1.3 and 1.55 μm have been achieved. Therefore, the coarse wavelength division multiplexing （CWDM） wavelength range of 1.3 to 1.6 μm at 10 Gb/s can be accomplished with one technology. Error-free data-transmission at 10 Gb/s over a fiber link of 20 km is demonstrated. One-dimensional arrays have been fabricated with emission wavelengths addressable by current tuning. Micro-electro-mechanical system （MEMS） tunable devices provide an extended tuning range in excess of 50 nm with high spectral purity. All these devices feature continuous-wave （CW） operation with typical single-mode output powers exceeding 1 mW. The operation voltage is around 1 - 1.5 V and power consumption is as low as 10 - 20 mW. Furthermore, we have also developed VCSELs based on GaSb, targeting functionality of tunable diode laser spectroscopy （TDLS） applying a 1.84-μm VCSEL. at the wavelength range from 2.3 to 3.0 μm. The systems is shown by presenting a laser hygrometer

关键词： mode VCSEL Single-mode and tunable VCSELs in the near-to mid-infrared Invited Paper