Photometric invariant stereo matching method

Illumination Invariant Face Recognition Using Photometric Stereo

In this paper, we propose an elegant approach for illumination invariant face recognition based on the photometric stereo technique. The basic idea is to reconstruct the surface normal and the albedo of a face using photometric stereo images, and then use them as the illumination independent model of the face. And, we have investigated the optimal light source directions for accurate surface sh...

Wavelet-constrained stereo matching under photometric variations

We propose a new method to address the problem of stereo matching under varying illumination conditions. First, a spatially varying multiplicative model is developed to account for photometric changes induced between both images in the stereo pair. The stereo matching problem based on this model is then formulated as a constrained optimization problem in which an appropriate convex objective fu...

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...

An Application of the Photometric Stereo Method

Combination method: Photometric stereo with Shadows

This paper presents an algorithm allowing to perform photometric stereo with high accuracy results in the presence of shadows. First, we choose a combination of three images suited to reveal the presence of shadow and use it to calculate the normal vector on each pixel. This normal vector is then used to recalculate the intensity in order to evaluate the distance with the real intensities and d...