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Aiming at multirate multisensor tracking system, an interactive fusion algorithm named IFATF is proposed. Local sensors observe the moving target independently and take the filter estimation letting the nearer estimation of fusion center and the sensor itself as previous estimation. Fusion center firstly gets the states and covariance of local sensors at the fusion time by Kalman prediction, then...
This paper proposes a novel hybrid image denoising method based on wavelet transform and sparse and redundant representations model which is called signal-scale wavelet K-SVD algorithm (SWK-SVD). In wavelet domain, mutiscale features of images and sparse prior of wavelet coefficients are achieved in a natural way. This gives us the motivation to build sparse representations in wavelet domain. Using...
Traditional appearance-based head pose estimation methods use the holistic face appearance as the input and then employ subspace analysis methods to extract low-dimensional features for classification. However, the face appearance may be more related to the unique identity of an individual rather than head poses. In this paper, we presented a comparative study of two image representations which aim...
In this paper, authors propose a new learning based method for medical image retrieval which is based on fusing different features by linearly combining different similarities. Considering the abundant classes of medical images, this paper avoid to train a classifier for each class by using large amount training data. Instead, by using optimization method to combine different features' similarity,...
This paper presents a novel method for fast and quantified estimation of blocking artifacts for H.264 videos. Based on physiological characteristics of the human visual system (HVS), the proposed method takes into account the temporal blocky distortion between two successive frames and is well adapted to the videos in which the in-loop deblocking filter is applied. Furthermore, the proposed method...
Dynamic textures are temporally continuous and infinitely varying sequences of images with certain spatial and temporal properties and have many potential applications. Such applications usually require dynamic texture segmentation that is not an easy task especially when the background is cluttered and textured. In this paper, we analyze the spatio-temporal slices of dynamic texture using Fourier...
In this paper, we consider the problem of classifying a real world image to the corresponding object class based on its visual content via sparse representation, which is originally used as a powerful tool for acquiring, representing and compressing high-dimensional signals. Assuming the intuitive hypothesis that an image could be represented by a linear combination of the training images from the...
Aerodrome control simulation system is on the support of virtual reality environment with the sense of high reality and immersion to simulate the air traffic control in the aerodrome tower. Virtual reality technology, distributed real-time computing, ATC control and information processing technology are integrated in the system. Multi-channel display system is realized to simulate the 360 degree whole...
We propose a method for three-dimensional surface details mapping and rendering based on conventional relief texture mapping. The depth extrema of intersection points within a viewing cone are computed and stored in a minmax texture in the preprocessing time. This texture is then used to narrow down the search space of ray-height-field intersection during rendering. As experimental results show, our...
This paper presents a fully automated system for realtime 3D human visual hull reconstruction and skeleton voxels extraction. The main contributions include: (1) A novel network based system is presented, which uses AXIS network cameras as video capture device, and performs a parallel processing among data capture, 3D voxel reconstruction and display. (2) A new human visual hull reconstruction algorithm...
Motion Capture has been widely used in many fields such as animation and game production. This paper describes the scheme and implementation of a self-designed vision-based motion capture system. This system is set up based on a Client/Server network structure. The client software tracks every marker attached to the actor's body and sends the results to the server in real-time. The server software...
An example-based floral pattern generation approach is proposed in this paper to improve the aesthetic design ability of computer, which will enable user's simple draft to be converted to an aesthetic pattern with a few interactions. The proposed approach commences with introducing artists work into the system by example patterns they drew. User's draft is segmented into elements, shape features of...
Orthogonal experimental design, an effective method of multi-factors researches, is capable of reducing the times of experiments, determining the sequence of priority of influencing factors rapidly and figuring out the best parameters and confidence degree. The novel characteristic of this paper is to apply the orthogonal experimental design into the evaluation research of image processing algorithms...
We present a novel 3D ear reconstruction method based on epipolar geometry. First, we calibrate the camera system. Second, we apply Harris corner detector to extract feature points from the first image. For every feature point, we apply epipolar geometry constrain to draw epipolar line in the second image and search corresponding point on it. Both the feature point and points on the epipolar line...
Packaging appearance is extremely important in cigarette manufacturing. Typically, there are two types of cigarette packaging defects: (1) cigarette laying defects such as incorrect cigarette numbers and irregular layout; (2) tin paper handle defects such as folded paper handles. In this paper, an automated vision-based defect inspection system is designed for cigarettes packaged in tin containers...
Barcode extraction is an essential step in the 2D barcode reading architecture. This paper presents the development and evaluation of a new approach toward the design of 2D barcode extraction based on texture direction analysis. This new approach can be detailed as: i) threshold a gray-level image; ii) analyze the texture direction of a window which is selected within the barcode area in the image;...
As the biggest sediment-laden river in the world, the river regime variation of the Yellow River is complicated which results in the difficulty in flood control at the wandering lower reaches of the Yellow River. The problem of the river regime variation detection with multi-spectral remote sensing images is investigated in this paper. Firstly, the flow characteristic of the wandering lower reaches...
Transfer function plays an important role in volume rendering. Multi-dimension transfer function can achieve high rendering quality, but suffer from troublesome user specifications. In order to reduce the complexity of manipulations, a transfer function design method based on dimension reduction model is proposed in this paper. The idea of dimension reduction model is to integrate several data features...
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