180 research outputs found
Shape from Distortion: 3D Range Scanning of Mirroring Objects
No full textObjects with mirroring surfaces are left out of the scope of most recent 3D scanning methods. We developed a new acquisition approach, shape-from-distortion, that focuses on that category of objects, requires only a still camera and a monitor, and generates high quality range scans (plus a normal field). Our contributions are a novel acquisition technique based on environment matting [Chuang et al. 2000] and corresponding geometry reconstruction method that recovers a very precise geometry model for mirroring objects
Aesop's Fables for Preschoolers
No full textThis is a large format booklet of 26 pages on heavy paper stock. It offers ten stories: LM, BS, GA, TH, DS, CP, “Boys and Frogs,” “Crab and Mother,” MM, and BC. The art is large, simple, playful: apt for preschoolers. The texts, as though typewritten, might use some words unfamiliar to preschoolers, like the “toils” of a hunter’s net or the grasshopper’s “fiddle.” I suspect that the texts, including their morals, were taken from some classic source. The tortoise wears glasses. The dog in DS has a good greed statement: “I need that bigger bone.” The moral for TH, which in its narrative speaks of “going slowly but steadily” is “The race is not always to the swift.” Will preschoolers understand that statement?No Autho
Crustal and Sedimentary Structures and Geodynamic Evolution of the West Antarctic Continental Margin and Pine Island Bay
No full textSince the last glacial maximum the West Antarctic Ice Sheet (WAIS) with a base mostly beneath the present-day sea-level has experienced dramatic volume changes within short periods of time. Studies are urgently required to show how these short-term variations are related to volume changes in the older geological past. Next to the ice drainage basins of the Weddell Sea and the Ross Embayment, Pine Island Bay forms the third-largest outflow area for the West Antarctic ice-shield. The main ice streams from the WAIS into Pine Island Bay flow through the Pine Island and Thwaites Glacier systems, through which most of the glacial-marine sediments onto the shelf of Pine Island Bay and across the continental slope into the deep sea have been transported. Geophysical surveys of the sedimentary sequences and the underlying basement of the shelf and slope of the southern Amundsen Sea, Pine Island Bay and its adjacent continental rise would allow reconstructions of the formation of the tectonic and older sedimentary processes as well as to find out about the history of large-scale glaciation in West Antarctica. Accurate models of the geodynamic- tectonic evolution contain some of the most important parameters for understanding and reconstruction of the palaeo-environment. The following objectives will be addressed during ANT XXflII4 as part of a cooperative project between the Vernadsky Institute in Moscow (Dr. Gleb Udintsev) and AWl:K. Gohl, G. Uenzelmann-Neben, G. Eagles, A. Fahl, T. Feigl, J. Grobys, J. Just, V. Leinweber, N. Lensch, C. Mayr, N. Parsiegla, N. Rackebrandt, P. Schloter, S. Suckro, K. Zimmermann, S. Gauger, H. Bohlmann, G. L. Netzeband, and P. Lemenkova. Crustal and Sedimentary Structures and Geodynamic Evolution of the West Antarctic Continental Margin and Pine Island Bay. Germany, Bremerhaven, 2006. doi: 10.13140/RG.2.2.16473.36961
Crustal and Sedimentary Structures and Geodynamic Evolution of the West Antarctic Continental Margin and Pine Island Bay
No full texthow to cite: Gohl, K., Uenzelmann-Neben, G., Eagles, G., Fahl, A., Feigl, T., Grobys, J., Just, J., Leinweber, V., Lensch, N., Mayr, C., Parsiegla, N., Rackebrandt, N., Schloter, P., Suckro, S., Zimmermann, K., Gauger, S., Bohlmann, H., Netzeband, G. L. & Lemenkova, P. Crustal and Sedimentary Structures and Geodynamic Evolution of the West Antarctic Continental Margin and Pine Island Bay (Germany, Bremerhaven, 2006). doi:10.13140/RG.2.2.16473.36961.</div
Segmental Brush Synthesis with Stroke Images
No full textWe present a new approach for synthesizing realistic brush strokes exploiting recent works of texture synthesis from stroke images. (See Figure 1). In our method, stroke images are automatically decomposed into a sequence of quad segments and stitched together along the path of user s input to produce final image. Numbers of methods using textures on digital painting have been explored; our usage of texture is novel in that the source image is typically a photo and the synthesis is fast enough to achieve realtime feedback. In contrast to previous methods, our approach allows a large variety of artistic brushes to be interactively simulated fairly so that unique media which haven t caught attention yet such as lipsticks or finger paint, are well reproduced. We shall show some artworks created using our method and demonstrate feasibility of our algorithm.We present a new approach for synthesizing realistic brush strokes exploiting recent works of texture synthesis from stroke images. (See Figure 1). In our method, stroke images are automatically decomposed into a sequence of quad segments and stitched together along the path of user s input to produce final image. Numbers of methods using textures on digital painting have been explored; our usage of texture is novel in that the source image is typically a photo and the synthesis is fast enough to achieve realtime feedback. In contrast to previous methods, our approach allows a large variety of artistic brushes to be interactively simulated fairly so that unique media which haven t caught attention yet such as lipsticks or finger paint, are well reproduced. We shall show some artworks created using our method and demonstrate feasibility of our algorithm.We present a new approach for synthesizing realistic brush strokes exploiting recent works of texture synthesis from stroke images. (See Figure 1). In our method, stroke images are automatically decomposed into a sequence of quad segments and stitched together along the path of user s input to produce final image. Numbers of methods using textures on digital painting have been explored; our usage of texture is novel in that the source image is typically a photo and the synthesis is fast enough to achieve realtime feedback. In contrast to previous methods, our approach allows a large variety of artistic brushes to be interactively simulated fairly so that unique media which haven t caught attention yet such as lipsticks or finger paint, are well reproduced. We shall show some artworks created using our method and demonstrate feasibility of our algorithm.Eurographics 2010 - Short PapersImages, Geometry, and Musi
Optimization Techniques in Computer Graphics and Appearance Fabrication
No full textTobias Rittig Optimization Techniques in Computer Graphics and Appearance Fabrication Optimization, the process of improving an intermediate solution, has been applied in numerous fields of computer science and beyond. Visual computing has throughout been at the forefront of developing new techniques and applying them to synthesize or analyze visual reality. At the latest, the recent boom of deep learning has given attention to large- scale differentiable computation and the application of gradient-descent optimization. This thesis spans parts of this development in four shared first-author publications (three journal, one conference) and three co-authored journal papers. It shows how optimization algorithms are used in two distinct fields of computer graphics. First, the focus is on the emerging field of Appearance Fabrication using full-color 3D printing. We show the benefits of an iterative optimization loop on the sharpness and color accuracy of translucent printouts. Such a loop, consisting of a forward pre- diction and backward refinement, can be composed of various building blocks developed throughout the thesis. The forward prediction can be driven by accurate Monte Carlo path tracing or an approximate neural rendering solution. The backward refinement can rely on a heuristic or a gradient-descent..
Deep crustal refraction and reflection seismics. Crustal and sedimentary structure and geodynamic evolution of the West Antarctic continental margin and Pine Island Bay
No full texthow to cite:Gohl, K., Uenzelmann-Neben, G., Eagles, G., Fahl, A., Feigl, T., Grobys, J., Just, J., V., L., Lensch, N., Mayr, C., Parsiegla, N., Rackebrandt, N., Schluter, P., Suckro, S., Zimmermann, K., Gauger, S., Bohlmann, H., Netzeband, G. & Lemenkova, P. Deep crustal refraction and reflection seismics. Crustal and sedimentary structure and geodynamic evolution of the West Antarctic continental margin and Pine Island Bay Expedition program No75 of ANT-XXIII/4 Cruise 11-12 (Alfred Wegener Institute for Polar and Marine Research, Germany, Bremerhaven, 2006), 20–30.</div
Validation of Color Managed 3D Appearance Acquisition
No full textImage-based appearance acquisition algorithms are
able to generate realistic 3D models of real objects but
have previously not taken care of calibrated color space.
We integrate a color managed high-dynamic range imaging
technique into a recent appearance acquisition algorithm
and generate models in CIE XYZ color space. We
compare the final models with spectrophotometric measurements
and compute difference images between renderings
and ground truth images. Displayed renderings and
printouts are compared to the original objects under identical
illumination conditions to evaluate and validate the
complete appearance reproduction pipeline. Working in
CIE XYZ color space allows for expressing the perceivable
differences in a standardized measure
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