Human Wearable Attribute Recognition Using Probability-Map-Based Decomposition of Thermal Infrared Images

Brahmastro KRESNARAMAN  Yasutomo KAWANISHI  Daisuke DEGUCHI  Tomokazu TAKAHASHI  Yoshito MEKADA  Ichiro IDE  Hiroshi MURASE  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A    No.3    pp.854-864
Publication Date: 2017/03/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E100.A.854
Type of Manuscript: PAPER
Category: Image
thermal infrared,  wearable attribute,  recognition,  decomposition,  probability map,  

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This paper addresses the attribute recognition problem, a field of research that is dominated by studies in the visible spectrum. Only a few works are available in the thermal spectrum, which is fundamentally different from the visible one. This research performs recognition specifically on wearable attributes, such as glasses and masks. Usually these attributes are relatively small in size when compared with the human body, on top of a large intra-class variation of the human body itself, therefore recognizing them is not an easy task. Our method utilizes a decomposition framework based on Robust Principal Component Analysis (RPCA) to extract the attribute information for recognition. However, because it is difficult to separate the body and the attributes without any prior knowledge, noise is also extracted along with attributes, hampering the recognition capability. We made use of prior knowledge; namely the location where the attribute is likely to be present. The knowledge is referred to as the Probability Map, incorporated as a weight in the decomposition by RPCA. Using the Probability Map, we achieve an attribute-wise decomposition. The results show a significant improvement with this approach compared to the baseline, and the proposed method achieved the highest performance in average with a 0.83 F-score.