Skip navigation.

UCSD Computer Vision

Ravi Ramamoorthi, Faculty

More info at: http://cseweb.ucsd.edu/~ravir
email: ravir@cs.ucsd.edu




Projects


City Forensics

A modern city is a massive and ceaseless information producer, constantly generating thousands of disparate pieces of localized information (e.g. housing prices, restaurant health inspection scores, crime statistics, precipitation levels, building code violations, water usage, etc.). We seek to us...

Light Fields for Computer Vision

The recent advent of commercial light field cameras, as well as depth cameras, opens up new opportunities for computer vision, with richer sensors. We are interested in the full stack of problems, from theoretical analysis of light field camera resolution, to shape recovery from multiple light fiel...

Complex Illumination, Materials and Shadows in Computer Vision

Natural illumination, realistic specular reflections, and complex cast shadows are key features in determining the appearance of objects. However, they have largely been ignored in computer vision algorithms. Our goal is to derive the theoretical foundations and mathematical equations and computatio...

Photometric Stereo

Photometric Stereo is a common method to acquire the shape of objects. We seek to extend the technique to non-Lambertian Reflectance, use differential methods to develop a new framework, and unify photometric stereo with shape from shading and structure from motion within the differential framework...




Publications


2015
Liang C., Ramamoorthi R., "A Light Transport Framework for Lenslet Light Field Cameras", ACM Transactions on Graphics (TOG), 2015. [BibTex][pdf]
Murez Z., Treibitz T., Ramamoorthi R., Kriegman D., "Photometric Stereo in a Scattering Medium", International Conference on Computer Vision (ICCV), 2015. [www] [BibTex]
2014
Tao M., Wang T., Malik J., Ramamoorthi R., "Depth Estimation for Glossy Surfaces with Light-Field Cameras", ECCV Workshop on Light Fields for Computer Vision (L4CV), 2014. [BibTex][pdf]
Arietta S.M., Efros A.A., Ramamoorthi R., Agrawala M., "City Forensics: Using Visual Elements to Predict Non-Visual City Attributes", IEEE Scientific Visualization (SciVis), 2014. [BibTex][pdf]
2013
Tao M., Malik J., Ramamoorthi R., "Sharpening Out of Focus Images using High-Frequency Transfer", Computer Graphics Forum, vol. 32, no. 2, pp. 489-498, May, 2013. [www] [BibTex][pdf]
Gu J., Nayar S., Grinspun E., Belhumeur P., Ramamoorthi R., "Compressive Structured Light for Recovering Inhomogeneous Participating Media", IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), vol. 35, no. 3, Mar, 2013. [www] [BibTex][pdf]
Chandraker M., Reddy D., Wang Y., Ramamoorthi R., "What Object Motion Reveals About Shape with Unknown BRDF and Lighting", Computer Vision and Pattern Recognition (CVPR), pp. 2523-2530, Jun, 2013. [BibTex][pdf]
Chandraker M., Bai J., Ramamoorthi R., "On Differential Photometric Reconstruction for Unknown, Isotropic BRDFs", IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), vol. 35, no. 12, pp. 2941-2955, Dec, 2013. [www] [BibTex][pdf]
Tao M., Hadap S., Malik J., Ramamoorthi R., "Depth from Combining Defocus and Correspondence Using Light Field Cameras", International Conference on Computer Vision (ICCV), pp. 673-680, 2013. [BibTex][pdf]
Reddy D., Bai J., Ramamoorthi R., "External Mask-Based Depth and Light Field Camera", ICCV Workshop on Consumer Depth Cameras for Computer Vision, 2013. [BibTex][pdf]
2012
Reddy D., Ramamoorthi R., Curless B., "Frequency-Space Decomposition and Acquisition of Light Transport under Spatially Varying Illumination", European Conference on Computer Vision (ECCV), pp. 6-596--6-610, Oct, 2012. [www] [BibTex][pdf]
Ng T., Pahwa R., Bai J., Tan K., Ramamoorthi R., "From the Rendering Equation to Stratified Light Transport Inversion", International Journal of Computer Vision (IJCV), vol. 96, no. 2, pp. 235-251, Feb, 2012. [www] [BibTex][pdf]
2011
Ramamoorthi R., "Sparse Reconstruction of Visual Appearance for Computer Graphics and Vision", SPIE Wavelets and Sparsity, Sep, 2011. [BibTex][pdf]
Chandraker M., Ramamoorthi R., "What an Image Reveals About Material Reflectance", International Conference on Computer Vision (ICCV), pp. 1076-1083, Oct, 2011. [www] [BibTex][pdf]
Chandraker M., Bai J., Ng T., Ramamoorthi R., "On the Duality of Forward and Inverse Light Transport", IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), vol. 33, no. 10, pp. 2122-2128, Oct, 2011. [www] [BibTex][pdf]
Chandraker M., Bai J., Ramamoorthi R., "A Theory of Differential Photometric Stereo for Unknown Isotropic BRDFs", International Conference on Computer Vision (ICCV), pp. 1076-1083, Oct, 2011. [www] [BibTex][pdf]
Carroll R., Ramamoorthi R., Agrawala M., "Illumination Decomposition for Material Recoloring with Consistent Interreflections", ACM Transactions on Graphics (SIGGRAPH 2011), vol. 30, no. 4, pp. 43, Jul, 2011. [www] [BibTex][pdf]
2010
Bai J., Chandraker M., Ng T., Ramamoorthi R., "A Dual Theory of Inverse and Forward Light Transport", European Conference on Computer Vision (ECCV), pp. 2-294--2-307, Sep, 2010. [www] [BibTex][pdf]
2009
Peers P., Mahajan D., Lamond B., Ghosh A., Matusik W., Ramamoorthi R., Debevec P., "Compressive Light Transport Sensing", ACM Transactions on Graphics, vol. 28, no. 1, Jan, 2009. [BibTex][pdf]
Gu J., Ramamoorthi R., Belhumeur P., Nayar S., "Removing Image Artifacts Due to Dirty Camera Lenses and Thin Occluders", ACM Transactions on Graphics (SIGGRAPH Asia 2009), vol. 28, no. 5, Dec, 2009. [www] [BibTex][pdf]
Mahajan D., Huang F., Matusik W., Ramamoorthi R., Belhumeur P., "Moving Gradients: A Path-Based Method for Plausible Image Interpolation", ACM Transactions on Graphics (SIGGRAPH 09), vol. 28, no. 3, Aug, 2009. [BibTex][pdf]
2008
Gu J., Nayar S., Grinspun E., Belhumeur P., Ramamoorthi R., "Compressive Structured Light for Recovering Inhomogeneous Participating Media", European Conference on Computer Vision (ECCV), pp. 4-845-4-858, Oct, 2008. [BibTex][pdf]
Belhumeur P., Chen D., Feiner S., Jacobs D.W., Kress J.W., Ling H., Lopez I.C., Ramamoorthi R., Sheorey S., White S., Zhang L., "Searching the World's Herbaria: Visual Identification of Plant Species", European Conference on Computer Vision (ECCV), pp. 4-116-4-129, Oct, 2008. [BibTex][pdf]
Osadchy M., Jacobs D.W., Ramamoorthi R., Tucker D., "Using Specularities in Comparing 3D Models and 2D Images", Computer Vision and Image Understanding, vol. 111, no. 3, pp. 275-294, Mar, 2008. [BibTex]
Mahajan D., Ramamoorthi R., Curless B., "A Theory of Frequency Domain Invariants: Spherical Harmonic Identities for BRDF/Lighting Transfer and Image Consistency", IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), vol. 30, no. 2, pp. 197-213, Feb, 2008. [www] [BibTex][pdf]
2007
Young M., Beeson E., Davis J., Rusinkiewicz S., Ramamoorthi R., "Viewpoint-Coded Structured Light", Computer Vision and Pattern Recognition (CVPR), Jun, 2007. [BibTex][pdf]
2006
Mahajan D., Ramamoorthi R., Curless B., "A Theory of Frequency Domain Invariants: Spherical Harmonic Identities of BRDF/Lighting Transfer and Image Consistency", European Conference on Computer Vision (ECCV), pp. 4-41--4-55, Oct, 2006. [www] [BibTex][pdf]
Zickler T., Ramamoorthi R., Enrique S., Belhumeur P., "Reflectance-Sharing: Image-Based Rendering from a Sparse Set of Images", IEEE Transactions on Pattern Analysis and Machine Intelligence (PAMI), vol. 28, no. 8, pp. 1287-1302, Aug, 2006. [BibTex][pdf]
Ramamoorthi R., "Modeling Illumination Variation with Spherical Harmonics", Face Processing: Advanced Modeling and Methods, 2006. [BibTex][pdf]
2005
Nehab D., Rusinkiewicz S., Davis J., Ramamoorthi R., "Efficiently Combining Positions and Normals for Precise 3D Geometry", ACM Transactions on Graphics , vol. 24, no. 3, pp. 536-543, Jun, 2005. [www] [BibTex][pdf]
Ramamoorthi R., Koudelka M., Belhumeur P., "A Fourier Theory of Cast Shadows", A Fourier Theory for Cast Shadows, vol. 27, no. 2, pp. 288-295, Feb, 2005. [BibTex][pdf]
Davis J., Nehab D., Ramamoorthi R., Rusinkiewicz S., "Spacetime Stereo: A Unifying Framework for Depth from Triangulation", IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 27, no. 2, pp. 296-302, Feb, 2005. [www] [BibTex][pdf]
2004
Ramamoorthi R., Koudelka M., Belhumeur P., "A Fourier Theory for Cast Shadows", European Conference on Computer Vision (ECCV), pp. 146-162, Sep, 2004. [BibTex][pdf]
2003
Davis J., Ramamoorthi R., Rusinkiewicz S., "Spacetime Stereo: A Unifying Framework for Depth from Triangulation", Computer Vision and Pattern Recognition (CVPR), pp. 359-366, Jun, 2003. [www] [BibTex][pdf]
Agarwal S., Ramamoorthi R., Belongie S., Jensen H., "Structured Importance Sampling of Environment Maps", SIGGRAPH, San Diego, CA, 2003. [BibTex][pdf]
Osadchy M., Jacobs D.W., Ramamoorthi R., "Using Specularities for Recognition", International Conference on Computer Vision (ICCV), pp. 1512-1519, 2003. [BibTex][pdf]
2002
Ramamoorthi R., "Analytic PCA Construction for Theoretical Analysis of Lighting Variability in Images of a Lambertian Object", IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 24, no. 10, pp. 1322-1333, Oct, 2002. [BibTex][pdf]
2001
Ramamoorthi R., Hanrahan P., "A Signal-Processing Framework for Inverse Rendering", SIGGRAPH, pp. 117-128, Jul, 2001. [www] [BibTex][pdf]
1999
Ramamoorthi R., Arvo J., "Creating Generative Models from Range Images", SIGGRAPH, pp. 195-204, 1999. [www] [BibTex][pdf]