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Kernel descriptors have been proven to outperform existing histogram based local descriptors as such descriptors are extracted from the match kernels which measure similarities between image patches using different pixel attributes (gradient, colour or LBP pattern). The extraction of kernel descriptors does not require coarse quantization of pixel attributes. Instead, each pixel equally participates...
Tamura features are based on human visual perception and have huge potential in image representation. Conventional Tamura features only work on homogeneous texture images and perform poor on generic images. Therefore, many researchers attempt to improve Tamura features and most of the improvements are based on histogram based representation. Kernel descriptors have been shown to outperform existing...
A novel local texture feature extraction algorithm is proposed based on histogram of oriented gradient domain texture tendency (HOGTT). Classical HOG descriptor proves to be sensitive to rotation transformation, though it is insensitive to illumination and scale changes. The intrinsic texture tendency of tyre tread image has obvious consistency and is robust to different types of images transformation...
Based on a large scale crime scene investigation (CSI) image database, an effective and efficient CSI image retrieval system has been proposed to empower the investigative work of the police force. The main contribution of this paper includes: (1) a DCT domain texture feature extraction algorithm is proposed for CSI images, which is shown to be simple and effective. (2) the use of GIST descriptor...
A compact patch antenna array with high isolation by using two decoupling structures including a row of fractal uniplanar compact electromagnetic band-gap (UC-EBG) structure and three cross slots is proposed. Simulated results show that significant improvement in interelement isolation of 16dB is obtained by placing the proposed two decoupling structures. The design is easy to be manufactured without...
Although the navigation safety has been greatly improved nowadays, automation of ship driving are not achieved completely as the automation of collision avoidance has not achieved perfectly. This paper mainly research on ship domain modeling and application for ship collision avoidance. The novel achievements are that it proposed a 3-d model of ship domain and improved the danger judgments of collision...
With the purpose of automatic detection of crowd patterns including abrupt and abnormal changes, a novel approach for extracting motion “textures” from dynamic Spatio-Temporal Volume (STV) blocks formulated by live video streams has been proposed. This paper starts from introducing the common approach for STV construction and corresponding Spatio-Temporal Texture (STT) extraction techniques. Next...
In order to achieve automatic prediction and warning of hazardous crowd behaviors, a Spatio-Temporal Volume (STV) analysis method is proposed in this research to detect crowd abnormality recorded in CCTV streams. The method starts from building STV models using video data. STV slices — called Spatio-Temporal Textures (STT) — can then be analyzed to detect crowded regions. After calculating the Gray...
With high expansibility of sensor electronic devices, wireless sensor networks have attracted more and more attention. The k nearest neighbors (k-NN) query has become a significant part of sensor networks due to its availability and convenience. However, it is an important but challenging problem to keep privacy and security while still maintaining low energy consumption. In this paper, we address...
Over-exposed region detection is commonly used for image editing and other applications such as over-exposure corrections. In broadcasting, over-exposed regions in image/video can be detected and corrected prior to sending them to consumers. However, the current detection of over-exposed regions is sometimes inaccurate. The detected over-exposed regions are susceptible to noise and scattered. In this...
This paper introduces a closed loop control WPT system with LCL-LC resonance structure. The characters and advantages of this structure is analyzed. In the unstable environment such as changing bar voltage and lateral displacement, this system ensures constant current output to battery load with an efficiency above 80%, which is verified through practical measurements in this paper.
Dynamic Wireless Power Transfer (WPT) technology, with broad prospects, provides a safe and convenient charging solution for electric vehicles and promotes the development of electric vehicle industry. In this paper, the WPT system is modeled by Generalized State Space Averaging (GSSA) method and the influence of system parameters on the dynamic characteristics of the system is analyzed. Based on...
Crime scene investigation (CSI) images are important clues for the police to solve cases. With the available of large scale CSI image database, effective and efficient CSI image retrieval becomes more and more important. The main contribution of this paper includes: (1) a DCT domain texture feature extraction algorithm is constructed for effective description of CSI images; (2) GIST descriptor is...
In this paper, we propose the first deep reinforce-ment learning framework to estimate the optimal Dynamic Treat-ment Regimes from observational medical data. This framework is more flexible and adaptive for high dimensional action and state spaces than existing reinforcement learning methods to model real life complexity in heterogeneous disease progression and treatment choices, with the goal to...
A low-RCS and high-gain broadband circularly polarized (CP) antenna with a low profile is presented. The CP antenna features a wide AR bandwidth (AR ≤ 3 dB) of 14.9% and an impedance bandwidth (S11 ≤ −10 dB) of 21%. Their overlapping band is the same as the AR bandwidth. The RCS of the proposed antenna is significantly reduced from 5GHz to 10GHz by using three kinds of artificial magnetic conductors...
When the satellite signal is blocked, the ground terminal cannot be accurately positioned because it cannot receive the satellite signal. In this case, it is necessary to study how to use other ways to achieve positioning and navigation. Inertial navigation inertial sensors to rely on sensing carrier acceleration and angular velocity, the position of the carrier can provide continuous in is not dependent...
In view of the characteristics of non-silicon flat micro parts in MEMS devices, such as small, light and thin, a vacuum adsorption microassembly system based on microvision was established. Through the research on the key assembly technologies of micro-gripper operation, moving control and micro vision positioning, a general scheme of automatic assembly for flat micro parts is put forward, which is...
Drought occurs frequently in the world and it has great influence on the crops. Satellite remote sensing has been widely used in drought monitoring because of its wide range, fast information and short cycle. Temperature vegetation dryness index based on NDVI-Ts space is widely used to assess drought conditions. In this study, LAI-Ts space, constructed from MODIS MOD15A2 and MOD11A2 products, was...
The blast furnace gas is an important secondary energy for the iron and steel production. Establishing an effective model to describe the state of BFG system is of great significant to maintain the system balance and stability. Considering the strong coupling characteristics of the blast furnace gas system and the high level noises in the industrial data, a simplex unscented Kalman filter-based Wang-Mendel...
This paper proposes a technique to improve the robustness of spread spectrum (SS) audio watermarking for acoustic propagation. The appropriate embedding areas should be selected to achieve good perceptibility and high robustness. In order to improve the redundancy and robustness, the cross spread spectrum (CSS) scheme based on highly correlated cross frames is proposed which could decrease the variance...
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