Shape Estimation of Transparent Objects by Using Inverse Polarization Ray Tracing
IEEE Transactions on Pattern Analysis and Machine Intelligence
Two-dimensional BRDF estimation from polarisation
Computer Vision and Image Understanding
Robust Estimation of Reflectance Functions from Polarization
IbPRIA '07 Proceedings of the 3rd Iberian conference on Pattern Recognition and Image Analysis, Part II
Object separation by polarimetric and spectral imagery fusion
Computer Vision and Image Understanding
Efficient surface reconstruction from noisy data using regularized membrane potentials
IEEE Transactions on Image Processing
Surface reconstruction using polarization and photometric stereo
CAIP'07 Proceedings of the 12th international conference on Computer analysis of images and patterns
Surface material segmentation using polarisation
MCPR'10 Proceedings of the 2nd Mexican conference on Pattern recognition: Advances in pattern recognition
Natural material segmentation and classification using polarisation
IbPRIA'11 Proceedings of the 5th Iberian conference on Pattern recognition and image analysis
Robust shape and polarisation estimation using blind source separation
CAIP'11 Proceedings of the 14th international conference on Computer analysis of images and patterns - Volume Part I
Refractive index estimation of naturally occurring surfaces using photometric stereo
ICIAP'11 Proceedings of the 16th international conference on Image analysis and processing: Part I
Analysis of directional reflectance and surface orientation using fresnel theory
CIARP'05 Proceedings of the 10th Iberoamerican Congress conference on Progress in Pattern Recognition, Image Analysis and Applications
Estimating surface characteristics and extracting features from polarisation
SSPR'12/SPR'12 Proceedings of the 2012 Joint IAPR international conference on Structural, Syntactic, and Statistical Pattern Recognition
Shape and Refractive Index from Single-View Spectro-Polarimetric Images
International Journal of Computer Vision
Robust estimation of shape and polarisation using blind source separation
Pattern Recognition Letters
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When unpolarized light is reflected from a smooth dielectric surface, it becomes partially polarized. This is due to the orientation of dipoles induced in the reflecting medium and applies to both specular and diffuse reflection. This paper is concerned with exploiting polarization by surface reflection, using images of smooth dielectric objects, to recover surface normals and, hence, height. This paper presents the underlying physics of polarization by reflection, starting with the Fresnel equations. These equations are used to interpret images taken with a linear polarizer and digital camera, revealing the shape of the objects. Experimental results are presented that illustrate that the technique is accurate near object limbs, as the theory predicts, with less precise, but still useful, results elsewhere. A detailed analysis of the accuracy of the technique for a variety of materials is presented. A method for estimating refractive indices using a laser and linear polarizer is also given.