Consistent matching based on boosted salience channels for group re-identification

Associating groups of people across non-overlapping camera views is an important but unsolved problem. Compared with the similar person re-identification task, group re-identification introduces some new challenges, such as significant deformation in uncontrolled directions, great intra-group occlusions and so on. In this paper, we propose a novel patch matching based framework for group re-identification. Discriminative salience channels are learned to filter out highly unreliable and non-informative patch matches between two group images, while retain true matches undergoing appearance variations. The resulting candidate correspondences are further explored by the proposed consistent matching process, which prefers coherent matches in true group image pairs. The effectiveness of our approach is validated on two group re-identification datasets: ZeCSS and i-LIDS MCTS. It outperforms state-of-the-art methods on both datasets.