People Semantic Description and Re-identification from Point Cloud Geometry

Castrillón-Santana, Modesto; Lorenzo-Navarro, Javier; Hernández-Sosa, Daniel

doi:10.1109/icpr.2014.804

Cited by 4 publications

(1 citation statement)

References 16 publications

(24 reference statements)

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“…So far, only a few depth-based re-identification methods based on depth image, point cloud and anthropometric measurement [1]- [4], [62]- [64] have been developed. To some extent, depth-based methods can solve the problems of changing clothes and extreme illumination.…”

Section: B Depth-based Person Re-identificationmentioning

confidence: 99%

Robust Depth-Based Person Re-Identification

Zheng

Lai

2017

IEEE Trans. on Image Process.

137

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Abstract-Person re-identification (re-id) aims to match people across non-overlapping camera views. So far the RGB-based appearance is widely used in most existing works. However, when people appeared in extreme illumination or changed clothes, the RGB appearance-based re-id methods tended to fail. To overcome this problem, we propose to exploit depth information to provide more invariant body shape and skeleton information regardless of illumination and color change. More specifically, we exploit depth voxel covariance descriptor and further propose a locally rotation invariant depth shape descriptor called Eigen-depth feature to describe pedestrian body shape. We prove that the distance between any two covariance matrices on the Riemannian manifold is equivalent to the Euclidean distance between the corresponding Eigen-depth features. Furthermore, we propose a kernelized implicit feature transfer scheme to estimate Eigendepth feature implicitly from RGB image when depth information is not available. We find that combining the estimated depth features with RGB-based appearance features can sometimes help to better reduce visual ambiguities of appearance features caused by illumination and similar clothes. The effectiveness of our models was validated on publicly available depth pedestrian datasets as compared to related methods for person re-identification.

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