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An isolated sign language recognition system is presented in this paper. A RGB-D sensor, Microsoft Kinect, is used for obtaining color stream and skeleton points from the depth stream. For a particular sign we extract a representative feature vector composed by hand trajectories and hand shapes. A sparse dictionary learning algorithm, Label Consistent K-SVD (LC-KSVD), is applied to obtain a discriminative...
This paper presents a design of simultaneous localization and mapping (SLAM) for an omni-directional mobile robot using an omni-directional camera. A method is proposed to realize visual SLAM of the omni-directional mobile robot based on extended Kalman filter (EKF). Taking advantage of the 360deg view of omni-directional images, visual reference scan approach is adopted in the SLAM design. Features...
This paper introduces the conception of efficient projection vector by transforming Foley-Sammon discriminant analysis into a bi-objective constrained optimization problem. The conditions for the efficient projection vector are obtained through the necessary conditions for multi-objective optimization. The efficient projection vector is prove to be the eigen-vector of eigen-equation corresponding...
Under strong noise environments, the speech detection often performs bad, in order to make some improvements the Hilbert-Huang transform is used in the algorithm. The speech signal is decomposed into finite intrinsic mode functions, and then, with the Hilbert transform, the energy-frequency-time distribution of the original signal can be obtained. The EMD is used as a filter to remove unwanted noise,...
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