Computer Graphics and Visualization › Publications

2019

Pixel-perfect hard shadows produced by our method in the Citadel scene from different viewpoints.
Baran Usta, Leonardo Scandolo, Markus Billeter, Ricardo Marroquim, and Elmar Eisemann
A Practical and Efficient Approach for Correct Z-Pass Stencil Shadow Volumes
In Proceedings of High Performance Graphics (Short Papers), 2019
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OMiCroN overview. A renderable hierarchy is maintained while inserting incoming nodes in parallel. This cycle is repeated until the whole hierarchy is constructed.
Vinicius da Silva, Claudio Esperança, and Ricardo Marroquim
OMiCroN - Oblique Multipass Hierarchy Creation while Navigating
Computers & Graphics, 2019
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Stacked kernel processing times in Ordinary LE/TM, and stacked kernel overheads due to property computation in Early LE/TM and Late LE/TM measured on four image families (a)-(d), at 8192 × 8192 pixels. For each family member, represented by a point in the x-axes of the respective plot groups (a)-(d), kernel processing times and overheads were averaged over 100 executions. Analogous kernels in LE/TM are colored similarly. The vertical order of the colored stripes does not necessarily reflect the order of operations.
Pedro Asad, Ricardo Marroquim, and Andréa L. e L. Souza
On GPU Connected Components and Properties: A Systematic Evaluation of Connected Component Labeling Algorithms and Their Extension for Property Extraction
IEEE Trans Image Process, 2019
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Left: In the first detector setup the sample is illuminated by collimated light. The scattered light is captured and coupled into a fiber cable by an achromatic lens. The fiber cable is connected to an Ocean Optics Spectrometer. — Right: In the second detector setup the achromatic lens is replaced by an integrating sphere from Thorlabs and the sample is illuminated by converged light.
Olaf Clausen, Ricardo Marroquim, Arnulph Furhmann, and Holger Weigand
What is the Reddening Effect and does it really exist?
In Proceedings of MAM@EGSR, 2019
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Comparison of measured colors with its reproduction with the sRGB, the AdobeRGB, and the measured display profile on the Vive Pro
Olaf Clausen, Gregor Fischer, Arnulph Furhmann, and Ricardo Marroquim
Towards Predictive Virtual Prototyping: Color Calibration of Consumer VR HMDs
In Proceedings of 16th GI AR/VR Workshop, 2019
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2018

Olaf Clausen, Ricardo Marroquim, and Arnulph Furhmann
Acquisition and Validation of Spectral Ground Truth Data for Predictive Rendering of Rough Surfaces
Computer Graphics Forum, 2018
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2017

The same pattern of error can be noted on the vase. In general the error is very low, except at the center of some highlight regions.
Daniel Coutinho, Ricardo Marroquim, Matteo Dellepiane, and Roberto Scopigno
Assisted color acquisition for 3D models
Computers & Graphics, 2017
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From left to right: three ivory pieces that contain clear signs of degradation, and a 3D model of the last object.
Ricardo Marroquim, Asla Sá, Karina Rodriguez, and Rafael Zamorano
Digitising Ivory Artefacts at the National History Museum in Brazil
In Proceedings of GCH, 2017
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Reproduction from the animation Fullmetal Alchemist: Brotherhood. Guidelines are displaced for clarity purposes. Animation follows left to right, top to bottom.
Leonardo Carvalho, Ricardo Marroquim, and Emilio Vital Brazil
DiLight: Digital light table - Inbetweening for 2D animations using guidelines
Computers & Graphics, 2017
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2016

Ricardo Marroquim, Daniel Coutinho, and Marcus Granato
Digitizing 3D Historical Scientific Instruments with Laser and Photographic Technologies
2016
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Daniel Ponciano, Marcos Seefelder, and Ricardo Marroquim
Graph-based interactive volume exploration
Computers & Graphics, 2016
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Felipe de Carvalho, Emilio Vital Brazil, Ricardo Marroquim, Mario Souza, and Antonio Oliveira
Interactive cutaways of oil reservoirs
Graph Model, 2016
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2015

Typical 3D-UBM images of the four phantoms and for the rat right-side hindlimb lateral gastrocnemius at different view angles, generated after segmentation using the TurtleSeg software. (a) PH01LCY, (b) PH10SCY, (c) PH10SSCY, (d) PH10LCO and (e) lateral gastrocnemius.
Natália Martins, Luisa Carneiro, Hugo Dantas, Claudio Esperança, Ricardo Marroquim, et al.
Generation of 3D ultrasound biomicroscopic images: Technique validation and in vivo volumetric imaging of rat lateral gastrocnemius
Research on Biomedical Engineering, 2015
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Telescópio equatorial com 32cm de diâmetro de objetiva, feito por Thomas Cooke & Sons, (a) antes e (b) após a restauração (acervo MAST).
Marcus Granato, Guadalupe Santos, and Ricardo Marroquim
Research on Metal Objects Conservation in MAST: A Strategic Area For Museums in Brazil
In Proceedings of XVI ENANCIB, 2015
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2014

Rafael Romeiro, Ricardo Marroquim, Claudio Esperança, Andreia Breda, and Carlos Marcelo Figueredo
Forensic Facial Reconstruction Using Mesh Template Deformation with Detail Transfer over HRBF
In Proceedings of SIBGRAPI, 2014
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Renan Machado e Silva, Claudio Esperança, Ricardo Marroquim, and Antonio Oliveira
Image Space Rendering of Point Clouds Using the HPR Operator
Computer Graphics Forum, 2014
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Vinicius da Silva, Claudio Esperança, and Ricardo Marroquim
Lazy Work Stealing for Continuous Hierarchy Traversal on Deformable Bodies
In Proceedings of GRAPP, 2014
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Gustavo Pfeiffer, Ricardo Marroquim, and Antonio Oliveira
WebcamPaperPen: A Low-Cost Graphics Tablet
In Proceedings of 27th SIBGRAPI Conference on Graphics, Patterns and Images, 2014
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2013

Renato Farias, Ricardo Farias, Ricardo Marroquim, and Esteban Clua
Parallel Image Segmentation Using Reduction-Sweeps on Multicore Processors and GPUs
In Proceedings of SIBGRAPI, 2013
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2012

Example of a transformation into a multi-component target
Marcelo Renhe, Antonio Oliveira, Claudio Esperança, and Ricardo Marroquim
Enhanced Target Driven Smoke Morphing
In Proceedings of SIBGRAPI, 2012
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