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In this paper, the information acquisition problem of columnar moving obstacles is investigated for a quadrotor equipped with a stereo vision system flying in an indoor GPS-denied environment. A acquisition algorithm based on stereo vision is proposed to obtain the position and velocity direction. The spatial position relation between the quadrotor and the object detected is used to remove the interferences...
Sea-sky line extraction under complex sea-sky background plays a very important role in image processing for the detection and tracking of targets. In this paper, different from traditional methods, we proposed a novel sea-sky line extraction approach with straight line fitting based on line segment detection. Firstly, a fast and robust line segment detection method was used to locate the sea-sky...
In order to find an effective way to predict running of mechanical equipment, a new prediction method of mechanical fault based on principal component analysis (PCA) is proposed in this study. The disadvantages of traditional prediction methods and the presence and development in mechanical fault of PCA-based predication method were briefly introduced. Theoretical basis, analysis processes and parameters...
A method on circular pattern measurement in wafer fault pattern retrieval system is developed. It can help engineers to query circular wafer fault pattern to historical or other patterns for manufacturing fault detection and tracking. An enclosing polygon based on the vertices of boundary edges is constructed to describe the border of circular pattern. Experimental results show that the proposed approach...
In this paper, a kind of object representation model global structure constraint is presented, in which objects are described as constellations of points satisfied with their intrinsic specific global structure constraints. The spatial relations among all the patches of small color variations are extracted as shape model and the representative color information of patches are encoded and clustered...
The imaging laser radar was an ideal imaging sensor to get the high precision 3D terrain for terrain aided navigation (TAN). For the application, decreasing the mismatching rate was very important. In this paper, the measurement model of imaging laser radar was introduced and a novel 3D terrain matching algorithm with low mismatching rate was presented. According to the theory of function orthogonal...
The automatic recognition of human face presents a significant challenge to the pattern recognition research community recently. As a traditional method for face recognition, principal component analysis (PCA) may neglect differentia. Since kernel partial least squares (KPLS) creates orthogonal score vectors by using the existing correlations and keeps most of the variance between different classes,...
We propose a multiscale feature extraction method of finger-vein patterns based on wavelet and local interconnection structure neural networks. The finger-vein image is performed the multiscale self-adaptive enhancement transform. A neural network with local interconnection structure is designed to extract the features of the finger-vein pattern. This method has three features: Firstly, by applying...
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