A Pose-Invariant Descriptor for Human Detection and Segmentation

We present a learning-based, sliding window-style approach for the problem of detecting humans in still images. Instead of traditional concatenation-style image location-based feature encoding, a global descriptor more invariant to pose variation is introduced. Specifically, we propose a principled approach to learning and classifying human/non-human image patterns by simultaneously segmenting human shapes and poses, and extracting articulation-insensitive features. The shapes and poses are segmented by an efficient, probabilistic hierarchical part-template matching algorithm, and the features are collected in the context of poses by tracing around the estimated shape boundaries. Histograms of oriented gradients are used as a source of low-level features from which our pose-invariant descriptors are computed, and kernel SVMs are adopted as the test classifiers. We evaluate our detection and segmentation approach on two public pedestrian datasets.

• Type: Conference
• Year: 2008
• Where: ECCV
• Authors: Zhe Lin, Larry S. Davis
• Keywords: Computer Vision, ECCV 2008, Hierarchical Part-template Matching, Image Location-based Feature, Principled Approach, Public Pedestrian Datasets, Segmentation Approach