A Method for Enforcing Integrability in Shape from Shading Algorithms
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shape from shading
Height and gradient from shading
International Journal of Computer Vision
Integrability disambiguates surface recovery in two-image photometric stereo
International Journal of Computer Vision
Uniqueness in shape from shading
International Journal of Computer Vision
Surface Reflection: Physical and Geometrical Perspectives
IEEE Transactions on Pattern Analysis and Machine Intelligence
Estimation of Illuminant Direction, Albedo, and Shape from Shading
IEEE Transactions on Pattern Analysis and Machine Intelligence
Parametric Shape-from-Shading by Radial Basis Functions
IEEE Transactions on Pattern Analysis and Machine Intelligence
IEEE Transactions on Pattern Analysis and Machine Intelligence
Shape Reconstruction of 3D Bilaterally Symmetric Surfaces
International Journal of Computer Vision - Special issue on computer vision research at the Technion
3-D Stereo Using Photometric Ratios
ECCV '94 Proceedings of the Third European Conference-Volume II on Computer Vision - Volume II
Improving Browsing Performance: A study of four input devices for scrolling and pointing tasks
INTERACT '97 Proceedings of the IFIP TC13 Interantional Conference on Human-Computer Interaction
Comparing Images under Variable Illumination
CVPR '98 Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
Ill-Posed Problems in Early Vision
Ill-Posed Problems in Early Vision
A Modern Differential Geometric Approach to Shape from Shading
A Modern Differential Geometric Approach to Shape from Shading
Robust image based 3d face recognition
Robust image based 3d face recognition
A Quantified Study of Facial Asymmetry in 3D Faces
AMFG '03 Proceedings of the IEEE International Workshop on Analysis and Modeling of Faces and Gestures
Rank Constrained Recognition under Unknown Illuminations
AMFG '03 Proceedings of the IEEE International Workshop on Analysis and Modeling of Faces and Gestures
Facial asymmetry quantification for expression invariant human identification
Computer Vision and Image Understanding - Special issue on Face recognition
Acquiring Linear Subspaces for Face Recognition under Variable Lighting
IEEE Transactions on Pattern Analysis and Machine Intelligence
Visual tracking and recognition using probabilistic appearance manifolds
Computer Vision and Image Understanding
Acquiring height data from a single image of a face using local shape indicators
Computer Vision and Image Understanding
Recovering Facial Shape Using a Statistical Model of Surface Normal Direction
IEEE Transactions on Pattern Analysis and Machine Intelligence
IEEE Transactions on Pattern Analysis and Machine Intelligence
Facial Shape-from-shading and Recognition Using Principal Geodesic Analysis and Robust Statistics
International Journal of Computer Vision
Pose-encoded spherical harmonics for face recognition and synthesis using a single image
EURASIP Journal on Advances in Signal Processing
Facial Geometry Estimation Using Photometric Stereo and Profile Views
ICB '09 Proceedings of the Third International Conference on Advances in Biometrics
Visual tracking and recognition using probabilistic appearance manifolds
Computer Vision and Image Understanding
Estimating Facial Reflectance Properties Using Shape-from-Shading
International Journal of Computer Vision
A new statistical model combining shape and spherical harmonics illumination for face reconstruction
ISVC'07 Proceedings of the 3rd international conference on Advances in visual computing - Volume Part I
Model-based shape recovery from single images of general and unknown lighting
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Local facial asymmetry for expression classification
CVPR'04 Proceedings of the 2004 IEEE computer society conference on Computer vision and pattern recognition
Video-based face recognition using probabilistic appearance manifolds
CVPR'03 Proceedings of the 2003 IEEE computer society conference on Computer vision and pattern recognition
Combining probabilistic shape-from-shading and statistical facial shape models
ICIAP'11 Proceedings of the 16th international conference on Image analysis and processing: Part I
Asymmetric facial shape based on symmetry assumption
CCBR'11 Proceedings of the 6th Chinese conference on Biometric recognition
Molding face shapes by example
ECCV'06 Proceedings of the 9th European conference on Computer Vision - Volume Part I
A practical face relighting method for directional lighting normalization
AMFG'05 Proceedings of the Second international conference on Analysis and Modelling of Faces and Gestures
Pose-encoded spherical harmonics for robust face recognition using a single image
AMFG'05 Proceedings of the Second international conference on Analysis and Modelling of Faces and Gestures
Driving 3D morphable models using shading cues
Pattern Recognition
Comparative assessment of content-based face image retrieval in different color spaces
AVBPA'05 Proceedings of the 5th international conference on Audio- and Video-Based Biometric Person Authentication
Model-Based human teeth shape recovery from a single optical image with unknown illumination
MCV'12 Proceedings of the Second international conference on Medical Computer Vision: recognition techniques and applications in medical imaging
3D face sparse reconstruction based on local linear fitting
The Visual Computer: International Journal of Computer Graphics
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In this paper, we present a symmetric shape-from-shading (SFS) approach to recover both shape and albedo for symmetric objects. Lambertian surfaces with unknown varying albedo and orthographic projections are assumed. In our formulation of symmetric SFS, we have two image irradiance equations. One is the standard equation used in SFS, and the other is a self-ratio image irradiance equation. This new image irradiance equation relates the self-ratio image which is defined as the ratio of two-halves of the input image to light source and surface shape. The introduction of the self-ratio image facilitates the direct use of symmetry cue. Based on the self-ratio image, a new model-based symmetric source-from-shading algorithm is also presented. We then propose symmetric SFS algorithms to recover both shape and albedo from a single image and present experimental results.The new symmetric SFS scheme has one important property: the existence of a unique (global) solution which consists of unique (local) solutions at each point simultaneously obtained using the intensity information at that point and the surrounding local region and the assumption of a \cal {C}^2 surface. Proofs for the existence of a unique solution in the cases of unknown constant and non-constant albedos are provided.