PERALTA ET AL.: ADAPTIVE HIERARCHICAL CONTEXTS FOR OBJECT RECOGNITION 1 Adaptive hierarchical contexts for object recognition with conditional mixture of trees

Robust category-level object recognition is currently a major goal for the computer vision community. Intra-class and pose variations, as well as, background clutter and partial occlusions are some of the main difficulties to achieve this goal. Contextual in-formation, in the form of object co-occurrences and spatial constraints, has been suc-cessfully applied to improve object recognition performance, however, previous work considers only fixed contextual relations that do not depend of the type of scene under inspection. In this work, we present a method that learns adaptive conditional relation-ships that depend on the type of scene being analyzed. In particular, we propose a model based on a conditional mixture of trees that is able to capture contextual relationships among objects using global information about a scene. Our experiments show that the adaptive specialization of contextual relationships improves object recognition accuracy outperforming previous state-of-the-art approaches.