نتایج جستجو برای: minirhizotron images

تعداد نتایج: 262135  

2014
Michael Waechter Nils Moehrle Michael Goesele

3D reconstruction pipelines using structure-from-motion and multi-view stereo techniques are today able to reconstruct impressive, large-scale geometry models from images but do not yield textured results. Current texture creation methods are unable to handle the complexity and scale of these models. We therefore present the first comprehensive texturing framework for large-scale, real-world 3D...

1998
Andrew J. Lundberg Maureen C. Stone

This work presents a method for reconstructing 3D tongue surfaces during speech from ultrasound data. The method reduces the dimensionality of the tongue surface and maintains highly accurate reproduction of local deformation features. This modification is an essential step if multiplane tongue movements are to be reconstructed practically into tongue surface movements. Earlier work (Stone & Lu...

Journal: :Comput. Graph. Forum 2014
Zhenbao Liu Sicong Tang Weiwei Xu Shuhui Bu Junwei Han Kun Zhou

Since indoor scenes are frequently changed in daily life, such as re-layout of furniture, the 3D reconstructions for them should be flexible and easy to update. We present an automatic 3D scene update algorithm to indoor scenes by capturing scene variation with RGBD cameras. We assume an initial scene has been reconstructed in advance in manual or other semi-automatic way before the change, and...

Journal: :J. Comput. Physics 2006
Valerio Caleffi Alessandro Valiani Anna Bernini

The aim of this work is to develop a well-balanced Central Weighted Essentially Non Oscillatory (CWENO) method, fourth-order accurate in space and time, for shallow water system of balance laws with bed slope source term. Time accuracy is obtained applying a Runge-Kutta scheme (RK), coupled with the Natural Continuous Extension (NCE) approach. Space accuracy is obtained using WENO reconstructio...

Journal: :CoRR 2014
Jean-Baptiste Barreau Théophane Nicolas G. Bruniaux Emilien Petit Quentin Petit Yann Bernard Ronan Gaugne Valérie Gouranton

This paper presents an application of photogrammetry on ceramic fragments from two excavation sites located north-west of France. The restitution by photogrammetry of these different fragments allowed reconstructions of the potteries in their original state or at least to get to as close as possible. We used the 3D reconstructions to compute some metrics and to generate a presentation support b...

Journal: :New Phytologist 2021

Temperate forest ecosystems are exposed to a higher frequency, duration and severity of drought. To promote longevity in changing climate, we require better understanding the long-term impacts repetitive drought events on fine-root dynamics mature forests. Using minirhizotron methods, investigated effect seasonal single-species mixed-species arrangements Fagus sylvatica (European beech) Picea a...

2016
Mauricio Etchebehere Patrick P. Lin Bryan S. Moon

Background: Patellar resurfacing after routine arthroplasty remains controversial. Few studies have specifically examined the effect of patellar resurfacing on outcomes after resection of the distal part of the femur and reconstruction with a megaprosthesis. Our objective was to compare the outcomes of megaprosthesis reconstructions of the distal part of the femur with and without patellar resu...

2008
R. S. Thompson

The method of modern analogs is widely used to obtain estimates of past climatic conditions from paleobiological assemblages, and despite its frequent use, this method involved so-far untested assumptions. We applied four analog approaches to a continental-scale set of bioclimatic and plantdistribution presence/absence data for North America to assess how well this method works under near-optim...

2007
José António Gaspar Miguel Realpe Boris Xavier Vintimilla José Santos-Victor

Recent stereo cameras provide reliable 3D reconstructions. These are useful for selecting ground-plane points, register them and building mosaics of cluttered ground planes. In this paper we propose a 2D Iterated Closest Point (ICP) registration method, based on the distance transform, combined with a fine-tuning-registration step using directly the image data. Experiments with real data show t...

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