Gradient and curvature from the photometric-stereo method, including local confidence estimation

Gradient and Curvature from Photometric Stereo Including Local Confidence Estimation

Photometric stereo is one technique for 3D shape determination that has been implemented in a variety of experimental settings and that has produced consistently good results. The idea is to use intensity values recorded from multiple images obtained from the same viewpoint but under different conditions of illumination. The resulting radiometric constraint makes it possible to obtain local est...

Surface reflectance and normal estimation from photometric stereo

In this paper, we propose a new photometric stereo method for estimating diffuse reflection and surface normal from color images. Using dichromatic reflection model, we introduce surface chromaticity as a matching invariant for photometric stereo, which serves as the foundation of the theory of this paper. An extremely simple and robust reflection components separation method is proposed based ...

An Application of the Photometric Stereo Method

Local Motion Estimation from Stereo Image Sequences

This paper proposes a method for representing local temporal deformations of a 3D flexible surface in an orthogonal space from a sequence of stereo images. The approach uses a disparity space as the main space in order to represent all the 3D information. The local motions are estimated removing the rigid motions from the global motion in the disparity space. A robust algorithm based on the RAN...

Albedo Recovery Using a Photometric Stereo Method

This paper describes a method for the calculation of surface reflectance values via photometric stereo. Experimental results show that surfaces rendered with reflectance values calculated by the proposed method have more realistic appearances than those with constant albedo. 1 Center for Image Technology and Robotics Tamaki Campus, The University of Auckland, Auckland, New Zealand. 2 Agilent Te...