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Kawasaki, Japan

Creusot C.,Toshiba Randnter | Courty N.,IRISA UBS
IEEE Computer Society Conference on Computer Vision and Pattern Recognition Workshops | Year: 2013

This paper investigates the use of synthetic 3D scenes to generate ground truth of pedestrian segmentation in 2D crowd video data. Manual segmentation of objects in videos is indeed one of the most time-consuming type of assisted labeling. A big gap in computer vision research can not be filled due to this lack of temporally dense and precise segmentation ground truth on large video samples. Such data is indeed essential to introduce machine learning techniques for automatic pedestrian segmentation, as well as many other applications involving occluded people. We present a new dataset of 1.8 million pedestrian silhouettes presenting human-to-human occlusion patterns likely to be seen in real crowd video data. To our knowledge, it is the first publicly available large dataset of pedestrian in crowd silhouettes. Solutions to generate and represent this data are detailed. We discuss ideas of how this ground truth can be used for a large number of computer vision applications and demonstrate it on a camera calibration toy problem. © 2013 IEEE.

Hatakoshi G.-I.,Toshiba Randnter | Nunoue S.,Toshiba Randnter
Japanese Journal of Applied Physics | Year: 2013

Auger recombination was analyzed for wurtzite InGaN, where a higher conduction band has a significant effect on the Auger recombination coefficient. It was shown that the carrier density and temperature dependences show anomalous characteristics near the 450-nm-wavelength region. © 2013 The Japan Society of Applied Physics.

Tanamoto T.,Toshiba Randnter | Sugiyama H.,Toshiba Randnter | Inokuchi T.,Toshiba Randnter | Ishikawa M.,Toshiba Randnter | Saito Y.,Toshiba Randnter
Japanese Journal of Applied Physics | Year: 2013

Spin injection and detection are very sensitive to the interface properties between ferromagnet and semiconductor. Because the interface properties such as a tunneling resistance and a polarization factor can be chosen independently between the injection and detection sides, the magnetic transport properties are considered to depend on the asymmetry of the two interfaces. We theoretically investigate the effect of the asymmetric interfaces of the injection side and the detection side on both the local and non-local magnetoresistance measurements. The results show the magnetoresistance ratio of local measurement structure has its maximum at the symmetric structure, and the effect of the asymmetry is very weak for the non-local measurement structure. © 2013 The Japan Society of Applied Physics.

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