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In this paper, we present a realtime natural interaction system by using Kinect sensor. It can stability and smoothly control hand like mouse by user's holding hands, and implement common mouse operations such as 'clicking', 'dragging' and 'dropping' so on. Our interaction system is made of several novel technique. It can identify the user's interaction with intent by detecting the engaged/disengaged...
We propose the use of a light-weight setup consisting of a collocated camera and light source – commonly found on mobile devices – to reconstruct surface normals and spatially-varying BRDFs of near-planar material samples. A collocated setup provides only a 1-D “univariate” sampling of a 3-D isotropic BRDF. We show that a univariate sampling is sufficient to estimate parameters of commonly used analytical...
The modern image search system requires semantic understanding of image, and a key yet under-addressed problem is to learn a good metric for measuring the similarity between images. While deep metric learning has yielded impressive performance gains by extracting high level abstractions from image data, a proper objective loss function becomes the central issue to boost the performance. In this paper,...
Multibaseline phase unwrapping (PU) is a critical processing procedure of multibaseline synthetic aperture radar interferometry (InSAR). The presence of phase noise makes Chinese remainder theorem (CRT) method not robust enough and inapplicable in practical cases. In this letter, a method based on a closed-form robust Chinese remainder theorem (CFRCRT) is presented to improve the noise robustness...
In this paper, we propose a new efficient solution for securely outsourcing linear regression to a public cloud with robust answer verification. Additionally, we show our construction can be utilized to efficiently and securely outsource other large-scale matrix operations, such as determinant computation.
The variable spring-loaded inverted pendulum (V-SLIP) model captures characteristic properties of the hip or COM motion in human locomotion. A control strategy consists of a leg stiffness controller and a foot placement controller is proposed for a biped walker. Some restrictions are considered in the control strategy, e.g. the friction and the ability of the actuator. A novel trajectory function...
For the stabilization of ship course with the actuator dynamics, this paper presents a nonlinear robust controller design method using the sum of squares (SOS) technique combined with the dual to Lyapunov's stability theorem. Uncertain parameters originate from varying load condition and ship speed in the ship course model. Dynamic feedback is involved in the presence of the actuator dynamics, and...
In interventional radiology, pre-operative three dimensional (3-D) images (e.g. CT and MRI) can be fused to the real-time 2-D fluoroscopic images, known as 2-D/3-D image fusion or overlay. 2-D/3-D registration is usually performed at the beginning to ensure an accurate overlay. However, the misalignment caused by patient motion has to be corrected during the procedure. In this paper, we propose an...
The key to image interpolation is recovering pristine edge and detailed information as much as possible. Robust soft-decision adaptive interpolation (RSAI) shows excellent interpolation performance by adding weighted least squares estimation to soft-decision adaptive interpolation (SAI).We put forward a novel interpolation strategy-double constraints to modify and improve RSAI. Every pixel is double...
Based on the principle of wavelet transform, the basic assumptions of wavelet denoising is analyzed. In this paper we propose a robust wavelet transform algorithm using a α - trimmed mean filter as a “agent” component based on Donoho's soft thresholding shrinkage method. And on this basis, a detailed analysis on the structure of two-dimensional wavelet transform is made; two-dimensional robust wavelet...
In this paper, a strategy to combine digital and physical simulation to simulate the transient behaviors of large scale power system, was proposed. Based on back-to-back four-quadrant voltage source converter, a digital equivalent power system was constructed. Simulation results by PSCAD/EMTDC and physical simulation showed that the established digital equivalent power system can be used for physical...
This paper presents a transparent and accurate semi-blind audio watermarking algorithm, based on the Reduced Singular Value Decomposition (RSVD). The proposed scheme manipulates coefficients of one of the resulting unitary matrices for embedding watermark bits. To preserve audio fidelity a threshold-based distortion control technique is given. Test results on real music signals show that this watermarking...
An observer-based dynamic surface controller (ODSC) for a class of nonlinear system is designed. Firstly, observer is designed with quasi-one-sided Lipschitz condition to reduce conservative, then, a DSC is designed based on the state estimation. The method can enable the independent design of the observer and DSC. The global robust stable is proved and the tracking errors are bounded. Finally, a...
In this paper, we propose a new voice activity detection (VAD) algorithm to improve the speech detection robustness in nonstationary noisy environments. At front-end, Wiener filtering speech enhancement is adopted to suppress noise from noisy speech. Then, at back-end, the voice activity detector based on mel filter-bank spectral entropy is presented to distinguish speech from noise. We have evaluated...
In this paper, we present an effective feature normalization algorithm to improve the robustness of automatic speech recognition systems. At front-end, minimum mean square error log-spectral amplitude estimation speech enhancement is adopted to suppress noise from noisy speech. Then, at back-end, the histogram equalization feature normalization is used to deal with the residual mismatch between enhanced...
This paper proposes a novel voice activity detection (VAD) algorithm to improve the speech detection robustness in noisy environments. In the proposed algorithm, two-stage mel-warped Wiener filter is introduced to improve the performance of voice activity detector based on spectral entropy. Then an improved decision rule based on spectral entropy was derived. We have evaluated system performance under...
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