3D generic object categorization, localization and pose estimation. We propose a novel model to represent and learn generic 3D object categories. Our approach is to link together diagnostic parts of the objects from different viewing point. The resulting model is a compact summarization of both appearance and 3D shape of the object class. Click here for the ICCV 07 paper

NEW! Our dataset of 3D object categories is now available for download.

Capturing spatial-temporal relationships for object and action categorization. In this work we present a novel framework for learning the typical spatial-temporal relationship between object parts. These relationships are incorporated in a flexible model for object and action categorization. Click here for the original CVPR 06 paper or here for the latest work on action categorization.
Detecting specular surfaces on natural images. Recognizing and localizing specular (or mirror-like) surfaces from a single image is a great challenge to computer vision. We present a novel algorithm for identifying shiny materials based on low level image processing. Click here for the CVPR 07 paper
Perception of Reflective materials. How well can the human visual system see the shape of a reflective object? How does the brain identify a specular reflection as such and not as a piece of texture attached to the surface? Psychophysics analysis sheds light to these intriguing questions. Click here for details
Shadow Carving. Recovering the shape of objects by using self-shadows is the main goal of this project. Theoretical proof of correctness and experimental results with real object are presented. Click here for details.
3D Recovery of Specular Surfaces. We address the challenging problem of recovering the shape of a shiny surface when the only available information is the reflection of the surrounding world. We propose a geometrical and algebraic characterization of how a patch of the scene is mapped into an image by a mirror surface of given shape. Click here for details.
Analysis of paintings in Renaissance art. We study geometrical properties of the mirror in the Hans Memling’s 1487 diptych Virgin and Child and Maarten van Nieuwenhove. We aim at discovering if the mirror was not part of the painting’s initial design, but instead added later by the artist. Click here for details.