Sylvain Marchand
ABSTRACT
We propose a model to represent quasi-flat objects, such as ancient coins. These objects are flat surfaces, meaning their length and their width largely exceed their height, and feature a distinctive relief. This relief characterizes the object and its perception is directly influenced by the position of the object, the light direction and the viewer’s direction. Our model is a single (non classic) image representation containing the underlying structural variations of the object. This model, that we call “Multi-Light Energy Map”, is constructed out of several classic images taken with several illumination directions without computing the object’s surface normals. Together with this information about the magnitude of the object variations, it is possible to compute the information about the angular part, that we call “Multi-Light Orientation Map”. Using these two maps, it is possible to render an image of the object at any light azimuth, enabling the user to move the light sources during the visualization of the object. Moreover, these maps can be useful for the retrieval of ancient coins, either by robust image registration, or by object recognition using either contours or textures.
- John Canny. 1986. A Computational Approach to Edge Detection. IEEE Transactions on Pattern Analysis and Machine Intelligence PAMI-8 (1986), 679–698.Google Scholar
Digital Library
- Navneet Dalal and Bill Triggs. 2005. Histograms of oriented gradients for human detection. In 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR’05), Vol. 1. 886–893 vol. 1.Google ScholarDigital Library
- Sylvain Marchand et al.2009. IBISA: Image-Based Identification / Search for Archaeology. In Proceedings of the 10th International Symposium on Virtual Reality, Archaeology and Cultural Heritage (VAST’09). St. Julians, Malta, 57–60. VAST-STAR, Short and Project Proceedings.Google Scholar
- Robert T. Frankot and Rama Chellappa. 1988. A Method for Enforcing Integrability in Shape From Shading Algorithms. IEEE Transactions on Pattern Analysis and Machine Intelligence 10, 4 (July 1988), 439–451.Google ScholarDigital Library
- Chris G. Harris and Mike Stephens. 1988. A Combined Corner and Edge Detector. In Alvey Vision Conference.Google Scholar
- Berthold K. P. Horn. 1989. Shape from Shading. MIT Press, Cambridge, MA, USA, Chapter Obtaining Shape from Shading Information, 123–171.Google ScholarDigital Library
- Florian Lardeux. 2022. Robust Modelling and Efficient Recognition of Quasi-Flat Objects – Application to Ancient Coins. Ph. D. Dissertation. University of La Rochelle, France.Google Scholar
- Florian Lardeux, Sylvain Marchand, and Petra Gomez-Krämer. 2018. Multi-Light Energy Map. In EUROGRAPHICS Workshop on Graphics and Cultural Heritage (GCH). Vienna, Austria, 199–02.Google Scholar
- Florian Lardeux, Sylvain Marchand, and Petra Gomez-Krämer. 2021. Low-Complexity Arrays of Contour Signatures for Exact Shape Retrieval. Pattern Recognition 118 (2021), 108000.Google ScholarCross Ref
- David Lowe. 2004. Distinctive Image Features from Scale-Invariant Keypoints. International Journal of Computer Vision 60 (11 2004), 91–.Google ScholarDigital Library
- Tom Malzbender, Dan Gelb, and Hans Wolters. 2001. Polynomial Texture Maps. In Proceedings of the 28th Annual Conference on Computer Graphics and Interactive Techniques(SIGGRAPH ’01). ACM, New York, NY, USA, 519–528.Google ScholarDigital Library
- Sylvain Marchand. 2014. IBISA: Making Image-Based Identification of Ancient Coins Robust to Lighting Conditions. In EUROGRAPHICS Workshop on Graphics and Cultural Heritage (GCH). Darmstadt, Germany, 13–16.Google Scholar
- Mark Mudge, Jean-Pierre Voutaz, Carla Schroer, and Marlin Lum. 2005. Reflection Transformation Imaging and Virtual Representations of Coins from the Hospice of the Grand St. Bernard. In Proceedings of the International Symposium on Virtual Reality, Archaeology and Cultural Heritage (VAST). The Eurographics Association, Pisa, Italy, 29–29.Google Scholar
- Ramesh Raskar, Kar-Han Tan, Rogerio Feris, Jingyi Yu, and Matthew Turk. 2004. Non-photorealistic Camera: Depth Edge Detection and Stylized Rendering Using Multi-flash Imaging. In ACM SIGGRAPH 2004 Papers (Los Angeles, California) (SIGGRAPH ’04). ACM, New York, NY, USA, 679–688.Google Scholar
- Robert J. Woodham. 1980. Photometric Method For Determining Surface Orientation From Multiple Images. Optical Engineering 19, 1 (February 1980).Google ScholarCross Ref
- Chengzhuan Yang, Hui Wei, and Qian Yu. 2018. A Novel Method for 2D Nonrigid Partial Shape Matching. Neurocomputing 275 (January 2018), 1160–1176.Google Scholar
- Sebastian Zambanini and Martin Kampel. 2013. A Local Image Descriptor Robust to Illumination Changes. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 7944 LNCS, November 2015 (2013).Google Scholar
Index Terms
- Energy and Orientation Maps for Interactive Visualization and Retrieval of Ancient Coins
Recommendations
A hardware-assisted hybrid rendering technique for interactive volume visualization
VVS '02: Proceedings of the 2002 IEEE symposium on Volume visualization and graphicsThe scientific simulation and three-dimensional imaging systems in use today are producing large quantities of data that range from gigabytes to petabytes in size. Direct volume rendering, using hardware-based three-dimensional textures, is a common ...
Interactive global illumination based on coherent surface shadow maps
GI '08: Proceedings of Graphics Interface 2008Interactive rendering of global illumination effects is a challenging problem. While precomputed radiance transfer (PRT) is able to render such effects in real time the geometry is generally assumed static. This work proposes to replace the precomputed ...
Interactive illumination with coherent shadow maps
EGSR'07: Proceedings of the 18th Eurographics conference on Rendering TechniquesWe present a new method for interactive illumination computations based on precomputed visibility using coherent shadow maps (CSMs). It is well-known that visibility queries dominate the cost of physically based rendering. Precomputing all visibility ...
Comments