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    Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging (Unknown language)

    In: Computer Graphics Forum ; 38 , 1 ; 592-609  ; 2019
    • ISSN:
      1467-8659
    • Article (Journal)  /  Electronic Resource

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    We present an improved way of acquiring spatially varying surface reflectance represented by a bidirectional texture function (BTF). Planar BTF samples are measured as images at several inclination angles which puts constraints on the minimum depth of field of cameras used in the measurement instrument. For standard perspective imaging, we show that the size of a sample measured and the achievable spatial resolution are strongly interdependent and limited by diffraction at the lens' aperture. We provide a formula for this relationship. We overcome the issue of the required depth of field by using Scheimpflug imaging further enhanced by an anamorphic attachment. The proposed optics doubles the spatial resolution of images compared to standard perspective imaging optics. We built an instrument prototype with the proposed optics that is portable and allows for measurement on site. We show rendered images using the visual appearance measured by the instrument prototype.: We present an improved way of acquiring spatially varying surface reflectance represented by a bidirectional texture function (BTF). Planar BTF samples are measured as images at several inclination angles which puts constraints on the minimum depth of field of cameras used in the measurement instrument. For standard perspective imaging, we show that the size of a sample measured and the achievable spatial resolution are strongly interdependent and limited by diffraction at the lens' aperture. We provide a formula for this relationship. We overcome the issue of the required depth of field by using Scheimpflug imaging further enhanced by an anamorphic attachment. The proposed optics doubles the spatial resolution of images compared to standard perspective imaging optics. We built an instrument prototype with the proposed optics that is portable and allows for measurement on site. We show rendered images using the visual appearance measured by the instrument prototype.

    Table of contents – Volume 38, Issue 1

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    The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

    1
    Issue Information
    | 2019
    5
    2019_editorial_v2
    Chen, Min / Benes, Bedrich et al. | 2019
    7
    Robust Structure‐Based Shape Correspondence
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    21
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    46
    VisFM: Visual Analysis of Image Feature Matchings
    Li, Chenhui / Baciu, George et al. | 2019
    59
    Optimal Sample Weights for Hemispherical Integral Quadratures
    Marques, Ricardo / Bouville, Christian / Bouatouch, Kadi et al. | 2019
    73
    Turning a Digital Camera into an Absolute 2D Tele‐Colorimeter
    Guarnera, G. C. / Bianco, S. / Schettini, R. et al. | 2019
    87
    Generation and Visual Exploration of Medical Flow Data: Survey, Research Trends and Future Challenges
    Oeltze‐Jafra, S. / Meuschke, M. / Neugebauer, M. / Saalfeld, S. / Lawonn, K. / Janiga, G. / Hege, H.‐C. / Zachow, S. / Preim, B. et al. | 2019
    126
    FitConnect: Connecting Noisy 2D Samples by Fitted Neighbourhoods
    Ohrhallinger, S. / Wimmer, M. et al. | 2019
    138
    An Adaptive Multi‐Grid Solver for Applications in Computer Graphics
    Kazhdan, Misha / Hoppe, Hugues et al. | 2019
    151
    Realtime Performance‐Driven Physical Simulation for Facial Animation
    Barrielle, V. / Stoiber, N. et al. | 2019
    167
    A Survey of Simple Geometric Primitives Detection Methods for Captured 3D Data
    Kaiser, Adrien / Ybanez Zepeda, Jose Alonso / Boubekeur, Tamy et al. | 2019
    197
    Applying Visual Analytics to Physically Based Rendering
    Simons, G. / Herholz, S. / Petitjean, V. / Rapp, T. / Ament, M. / Lensch, H. / Dachsbacher, C. / Eisemann, M. / Eisemann, E. et al. | 2019
    209
    Visualization of Neural Network Predictions for Weather Forecasting
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    221
    Stylized Image Triangulation
    Lawonn, Kai / Günther, Tobias et al. | 2019
    235
    MegaViews: Scalable Many‐View Rendering With Concurrent Scene‐View Hierarchy Traversal
    Kol, Timothy R. / Bauszat, Pablo / Lee, Sungkil / Eisemann, Elmar et al. | 2019
    248
    Autonomous Particles for Interactive Flow Visualization
    Engelke, Wito / Lawonn, Kai / Preim, Bernhard / Hotz, Ingrid et al. | 2019
    260
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    274
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    286
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    300
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    316
    Denoising Deep Monte Carlo Renderings
    Vicini, D. / Adler, D. / Novák, J. / Rousselle, F. / Burley, B. et al. | 2019
    328
    TexNN: Fast Texture Encoding Using Neural Networks
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    340
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    Chou, Jia‐Kai / Wang, Yang / Ma, Kwan‐Liu et al. | 2019
    356
    A Survey on Data‐Driven 3D Shape Descriptors
    Rostami, R. / Bashiri, F. S. / Rostami, B. / Yu, Z. et al. | 2019
    394
    Gradient‐Guided Local Disparity Editing
    Scandolo, Leonardo / Bauszat, Pablo / Eisemann, Elmar et al. | 2019
    405
    Superpixel Generation by Agglomerative Clustering With Quadratic Error Minimization
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    417
    Shading‐Based Surface Recovery Using Subdivision‐Based Representation
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    429
    Learning A Stroke‐Based Representation for Fonts
    Balashova, Elena / Bermano, Amit H. / Kim, Vladimir G. / DiVerdi, Stephen / Hertzmann, Aaron / Funkhouser, Thomas et al. | 2019
    443
    Real‐Time Human Shadow Removal in a Front Projection System
    Kim, Jaedong / Seo, Hyunggoog / Cha, Seunghoon / Noh, Junyong et al. | 2019
    455
    Urban Walkability Design Using Virtual Population Simulation
    Mathew, C. D. Tharindu / Knob, Paulo R. / Musse, Soraia Raupp / Aliaga, Daniel G. et al. | 2019
    470
    Real‐Time Facial Expression Transformation for Monocular RGB Video
    Ma, L. / Deng, Z. et al. | 2019
    482
    A Variational Approach to Registration with Local Exponential Coordinates
    Paman, Ashish / Rangarajan, Ramsharan et al. | 2019
    507
    Visual Exploration of Dynamic Multichannel EEG Coherence Networks
    Ji, C. / Gronde, J. J. / Maurits, N. M. / Roerdink, J. B. T. M. et al. | 2019
    521
    Incremental Labelling of Voronoi Vertices for Shape Reconstruction
    Peethambaran, J. / Parakkat, A.D. / Tagliasacchi, A. / Wang, R. / Muthuganapathy, R. et al. | 2019
    537
    Style Invariant Locomotion Classification for Character Control
    Boehs, G.E. / Vieira, M.L.H. et al. | 2019
    549
    A Probabilistic Steering Parameter Model for Deterministic Motion Planning Algorithms
    Agethen, Philipp / Gaisbauer, Felix / Rukzio, Enrico et al. | 2019
    564
    Solid Geometry Processing on Deconstructed Domains
    Sellán, Silvia / Cheng, Herng Yi / Ma, Yuming / Dembowski, Mitchell / Jacobson, Alec et al. | 2019
    580
    Selective Padding for Polycube‐Based Hexahedral Meshing
    Cherchi, G. / Alliez, P. / Scateni, R. / Lyon, M. / Bommes, D. et al. | 2019
    592
    Increasing the Spatial Resolution of BTF Measurement with Scheimpflug Imaging
    Havran, V. / Hošek, J. / Němcová, Š. / Čáp, J. et al. | 2019
    610
    A Survey of Information Visualization Books
    Rees, D. / Laramee, R. S. et al. | 2019
    647
    MyEvents: A Personal Visual Analytics Approach for Mining Key Events and Knowledge Discovery in Support of Personal Reminiscence
    Parvinzamir, F. / Zhao, Y. / Deng, Z. / Dong, F. et al. | 2019
    663
    Filtered Quadrics for High‐Speed Geometry Smoothing and Clustering
    Legrand, Hélène / Thiery, Jean‐Marc / Boubekeur, Tamy et al. | 2019
    678
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    Rodolà, E. / Lähner, Z. / Bronstein, A. M. / Bronstein, M. M. / Solomon, J. et al. | 2019
    691
    Ballet
    | 2019

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    Commercial Copyright fee: €14.50 Basic fee: €4.00 Total price: €18.50
    Academic Copyright fee: €4.50 Basic fee: €2.00 Total price: €6.50

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