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Abstract: This paper presents a new method for the simultaneous estimation of lighting direction and shape from shading. The method estimates the shape and the lighting direction using a two step iterative process. We assume an initial (possibly incorrect) estimate of the lighting position. A stiff deformable model is then fitted to the image, assuming this lighting position. Next, a least-squares estimate of the lighting position is derived from the model using the Levenberg-Marquart method. The two... (Update)
Context of citations to this paper: More
...not be known. If the lightsource direction is unknown, both lightsource and object shape is recovered, in a coupled iterative process [5]. For each improved estimate of the shape we can derive an improved estimate of the lightsource and then in turn improve our estimate of...
.... deformable models we present segmentation as well as shape estimation and tracking methods based on the integration of visual cues [16, 17, 2, 5]. Depending on the application our methods use single or multi view image sequences as input. The accurate 3D tracking of the...
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4: Variable Albedo Surface Reconstruction from Stereo and Shape from Shading - Samaras, Metaxas et al. - 2000
3: Physics-Based Deformable Models - Applications to Computer Vision (context) - Metaxas - 1996
2: Cambridge University Press (context) - Flannery, Press et al. - 1992
BibTeX entry: (Update)
D. Samaras, D. Metaxas. Coupled Lighting Direction and Shape Estimation from Single Images. In ICCV 1999. http://citeseer.ist.psu.edu/samaras99coupled.html More
@inproceedings{ samaras99coupled,
author = "Dimitrios Samaras and Dimitris N. Metaxas",
title = "Coupled Lighting Direction and Shape Estimation from Single Images",
booktitle = "{ICCV} (2)",
pages = "868-874",
year = "1999",
url = "citeseer.ist.psu.edu/samaras99coupled.html" }
Citations (may not include all citations):1535 Cambridge University Press (context) - Press, Teukolsky et al. - 1992
139 Shape from Shading (context) - Horn, Brooks - 1989
113 Shape and Nonrigid Motion Estimation Through Physics-based S.. (context) - Metaxas, Terzopoulos - 1993
81 Numerical Shape from shading and occluding boundaries (context) - Ikeuchi, Horn - 1981
63 Stabilization of constraints and integrals of motion in dyna.. (context) - Baumgarte - 1972
62 Object-Centered Surface Reconstruction: Combining Multi-Imag.. - Fua, Leclerc - 1995
36 Physics-Based Deformable Models: Applications to Computer Vi.. (context) - Metaxas - 1996
32 Shape and source from shading (context) - Brooks, Horn - 1985
30 Improved methods of estimating shape from shading using the .. (context) - Lee, Rosenfeld - 1985
25 Shape from Shading: A Method for Obtaining the Shape of a Sm.. (context) - Horn - 1970
24 The Bas-Relief Ambiguity - Belhumeur, Kriegman et al. - 1997
24 The Direct Computation of Height from Shading - Leclerc, Bobick - 1991
24 From Regular Images to Animated Heads: A Least Squares Appro.. - Fua, Miccio - 1998
21 Analysis of shape from shading techniques - Zhang, Tsai et al. - 1994
8 A global algorithm for shape from shading (context) - Oliensis, Dupois - 1993
7 Diffuse reflectance from rough surfaces (context) - Oren, Nayar - 1993
6 Shape from Shading with a Linear Triangular Element Surface .. (context) - Lee, Kuo - 1993
3 A simple shape from shading algorithm (context) - Tsai, Shah - 1992
2 Physically-Based Adaptive Preconditioning for Early Vision - Lai, Vemuri - 1997
Documents on the same site (http://www.cis.upenn.edu/~samaras/): More
Incorporating Illumination Constraints in Deformable Models - Samaras, Metaxas (1998) (Correct)
Variable Albedo Surface Reconstruction from Stereo.. - Samaras, Metaxas.. (2000) (Correct)
Research Statement - Samaras (Correct)
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