198 Hits in 3.8 sec

3D sunken relief generation from a single image by feature line enhancement

Meili Wang, Liying Yang, Tingting Li, Shihui Guo, Jincen Jiang, Hongming Zhang, Jian Chang
2018 Multimedia tools and applications  
In this paper, we propose an efficient sunken relief generation algorithm based on a single image by the technique of feature line enhancement. Our method starts from a single image.  ...  Then we apply unsharp masking to sharpen the feature lines. After that, we enhance and smoothen the local information to obtain an image with less burrs and jaggies.  ...  , and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.  ... 
doi:10.1007/s11042-018-5826-7 fatcat:ectcploswzdqfpkiyg5kjoesua

A framework for digital sunken relief generation based on 3D geometric models

Meili Wang, Jian Chang, Jens Kerber, Jian J. Zhang
2011 The Visual Computer  
We propose a framework to produce sunken reliefs from a known 3D geometry, which transforms the 3D objects into three layers of input to incorporate the contour lines seamlessly with the smooth surfaces  ...  We propose a framework to produce sunken reliefs from a known 3D geometry, which transforms the 3D objects into three layers of input to incorporate the contour lines seamlessly with the smooth surfaces  ...  Lines in sunken relief and 3D line drawings Line drawings refer to extracting lines (the most obvious features of the model) from 3D models.  ... 
doi:10.1007/s00371-011-0663-y fatcat:i24a2dxiarhfrd4f4kxrm5ajg4

Relief stylization from 3D models using featured lines

Meili Wang, Jens Kerber, Jian Chang, Jian J. Zhang
2013 Proceedings of the 27th Spring Conference on Computer Graphics - SCCG '11  
In this paper, we present a method to create a relief-like sculpture using lines extracted from 3D Objects.  ...  Digital reliefs mimic the style of their real life counterparts, and hence offer an elegant depiction of a 3D shape.  ...  Shape from shading [Rados and Faugeras, 2005] , methods have shown that it is possible to construct a 3D shape given a single image.  ... 
doi:10.1145/2461217.2461226 dblp:conf/sccg/WangKCZ11 fatcat:gnkxrm2qvbf7rgjmbi2jpl2jvu

Computer Assisted Relief Generation-A Survey

J. Kerber, M. Wang, J. Chang, J. J. Zhang, A. Belyaev, H.-P. Seidel
2012 Computer graphics forum (Print)  
In this paper, we present an overview of the achievements accomplished to date in the field of computer-aided relief generation.  ...  The 3D models of the Lucy statue ( Figure 5 ), the castle ( Figure 6 ) and the armadillo (Figure 7 ) were provided by Google 3D Warehouse and the Stanford 3D Scanning Repository.  ...  Northwest A&F University and the Media School at Bournemouth University.  ... 
doi:10.1111/j.1467-8659.2012.03185.x fatcat:e4n5riqh7jco7jvc5dwikmae3a

Region-based bas-relief generation from a single image

Qiong Zeng, Ralph R. Martin, Lu Wang, Jonathan A. Quinn, Yuhong Sun, Changhe Tu
2014 Graphical Models  
In this paper, we present an algorithm for generating a bas-relief from a single image, inspired by the process that artists use to create reliefs.  ...  Feature lines are extracted and used to build a new region-based representation of the input image.  ...  We are also grateful to Jing Wu and Zhuwen Li for providing us with output bas-reliefs produced by their methods.  ... 
doi:10.1016/j.gmod.2013.10.001 fatcat:3yti2tata5dufpxahl7tbppdvi

Restoration of Brick and Stone Relief from Single Rubbing Images

Zhuwen Li, Song Wang, Jinhui Yu, Kwan-Liu Ma
2012 IEEE Transactions on Visualization and Computer Graphics  
We present a two-level approach for height map estimation from single images, aiming at restoring brick and stone relief (BSR) from their rubbing images in a visually plausible manner.  ...  We demonstrate that our method can not only successfully restore several BSR maps from their rubbing images, but also restore some relief-like surfaces from photographic images.  ...  Reconstructing a 3D object from a single 2D image is an ill-posed problem.  ... 
doi:10.1109/tvcg.2011.26 pmid:21282860 fatcat:7gnmrfznj5ae7j37mnbhp5fmny

Now You See It… Now You Don't: Understanding Airborne Mapping LiDAR Collection and Data Product Generation for Archaeological Research in Mesoamerica

Juan Fernandez-Diaz, William Carter, Ramesh Shrestha, Craig Glennie
2014 Remote Sensing  
In this paper we provide a description of airborne mapping LiDAR, also known as airborne laser scanning (ALS), technology and its workflow from mission planning to final data product generation, with a  ...  Throughout the paper we use examples from archeological ALS projects to illustrate the key concepts of importance for the archaeology researcher.  ...  Acknowledgments The authors will like to acknowledge that most of the data used to generate figures and tables were collected by NCALM for investigators whose hard work to secure funding, permits and other  ... 
doi:10.3390/rs6109951 fatcat:vpog5quksvdavgrlrgobmep6ri

Detection and segmentation of approximate repetitive patterns in relief images

Harshit Agrawal, Anoop M. Namboodiri
2012 Proceedings of the Eighth Indian Conference on Computer Vision, Graphics and Image Processing - ICVGIP '12  
Given a single image with reliefs, our algorithm finds dense matches of local features across the image at various scales.  ...  In relief images, foreground and background have nearly the same texture, and matching of a single feature would not provide reliable evidence of repetition.  ...  The relief images includes bas-reliefs or lowreliefs, high reliefs and sunken reliefs. We have used some of the facade images from ZuBuD database [16] .  ... 
doi:10.1145/2425333.2425379 dblp:conf/icvgip/AgrawalN12 fatcat:xglk63dmuraxjg3xhdxi5efhv4

Image-Based Underwater 3D Reconstruction for Cultural Heritage: From Image Collection to 3D. Critical Steps and Considerations [chapter]

Dimitrios Skarlatos, Panagiotis Agrafiotis
2020 Springer Series on Cultural Computing  
This chapter dis-cusses critical aspects of all phases of image based underwater 3D reconstruc-tion process, from data acquisition and data preparation using colour restora-tion and colour enhancement  ...  algorithms to Structure from Motion (SfM) and Multi-View Stereo (MVS) techniques to produce an accurate, precise and complete 3D model for a number of applications.  ...  Demesticha for providing data from several underwater sites, and moreover challenging the authors to overcome problems and shortcomings of the 3D documentation process in underwater CH.  ... 
doi:10.1007/978-3-030-37191-3_8 fatcat:xd6jun7ihrhdpdnpmj3ldele5y


M. Abdelaziz, M. Elsayed
2019 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
In 2009/2010, the CEAlex launched a 3D photogrammetry data-gathering programme for the virtual reassembly of broken artefacts.  ...  In this paper we present the methodology used for underwater data acquisition, data processing and modelling in order to generate a DSM of the submerged site of Alexandria's ancient lighthouse.  ...  The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLII-2/W10, 2019 Underwater 3D Recording and Modelling "A Tool for Modern Applications and CH Recording  ... 
doi:10.5194/isprs-archives-xlii-2-w10-1-2019 fatcat:vskxcoagjzeqlac2fgwjwke2im

Medieval Archaeology Under the Canopy with LiDAR. The (Re)Discovery of a Medieval Fortified Settlement in Southern Italy

Nicola Masini, Fabrizio Gizzi, Marilisa Biscione, Vincenzo Fundone, Michele Sedile, Maria Sileo, Antonio Pecci, Biagio Lacovara, Rosa Lasaponara
2018 Remote Sensing  
Other small, subtle features attributable to possible buried buildings of a habitation area have been identified by visual inspection of LDMs.  ...  The automatic procedure allowed us to extract the most significant and typical features of a fortified settlement, such as the city walls and a tower castle.  ...  preserved in the subsoil and in many cases under canopy; (iv) the exciting challenge from the scientific and archaeological point of view which impose ad hoc approaches by using remote sensing technologies  ... 
doi:10.3390/rs10101598 fatcat:kxj26uvsh5g77lvbcb46mni354

Robustly Removing Deep Sea Lighting Effects for Visual Mapping of Abyssal Plains [article]

Kevin Köser, Yifan Song, Lasse Petersen, Emanuel Wenzlaff, Felix Woelk
2021 arXiv   pre-print
Consequently, visual mapping, including image matching and surface albedo estimation, severely suffers from the effects that co-moving light sources produce, and larger mosaic maps from photos are often  ...  Robots diving down to great depths must bring light sources that create moving illumination patterns in the darkness, such that the same 3D point appears with different color in each image.  ...  Unless one is willing to use a team of robots with distributed light sources and cameras, image material taken by a single robot for large area mapping will be degraded by scattering.  ... 
arXiv:2110.00480v1 fatcat:eq4xqdq4c5bgdeyn3lpb6rd3fq


Alex Elvis Badillo
2022 Ancient Mesoamerica  
After their initial discovery, members of PAQuie documented the carved stone ballcourts using structure-from-motion (SfM) photogrammetry, a quick and affordable technique to collect 3D spatial, quantitative  ...  Then I describe the methods used to record the stone carvings, followed by a presentation of the data.  ...  Thank you to the anonymous reviewers, who helped me improve this article from its original draft.  ... 
doi:10.1017/s0956536121000523 fatcat:cjsnizsfnbchtjflxfxmiwukne

The Impact of Vegetation on the Visibility of Archaeological Features in Airborne Laser Scanning Datasets from Different Acquisition Dates

Michael Doneus, Łukasz Banaszek, Geert J. Verhoeven
2022 Remote Sensing  
A key feature that makes these models so valuable lies in their capacity to represent micro-relief features indicating traces of past human activity.  ...  Comparing five ALS data acquisition campaigns from both leaf-off (April and November) and leaf-on conditions (May and June), we demonstrate how foliage affects the morphology of relief features as recorded  ...  , Amt der Niederösterreichischen Landesregierung (A), University of Vienna (A), TU Wien (A), University for Continuing Education Krems (A), ZAMG-Central Institute for Meteorology and Geodynamics (A), Spanish  ... 
doi:10.3390/rs14040858 fatcat:c5y4x4abk5dgnaz5ziwway7kbe

A Multidisciplinary Approach for the Mapping, Automatic Detection and Morphometric Analysis of Ancient Submerged Coastal Installations: The Case Study of the Ancient Aegina Harbour Complex

Nikos Georgiou, Xenophon Dimas, Elias Fakiris, Dimitris Christodoulou, Maria Geraga, Despina Koutsoumpa, Kalliopi Baika, Pari Kalamara, George Ferentinos, George Papatheodorou
2021 Remote Sensing  
The structures' parameters were extracted from the acoustic data to analyze their morphometry, while photogrammetry was realized using a Remotely Operated Vehicle to expose their micro-structure.  ...  In this study, we present a multidisciplinary, non-intrusive downscale approach for the documentation of UCH implemented on the coastal area of Aegina Island, Greece, where a unique submerged harbour complex  ...  This software generates 3D models and orthorectified images from overlapping photos.  ... 
doi:10.3390/rs13214462 fatcat:dlokpzvvxzcy3j53cyihtjjyvm
« Previous Showing results 1 — 15 out of 198 results