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Image segmentation is a fundamental problem in image processing and computer vision. Its goal is to separate an image into a collection of distinct regions, after which other high-level tasks can be performed. Nomalized cut (Ncut) algorithm is the most popular one in image segmentation algorithms. However, the number of segmentation regions needs to be specified by users or experts before the Ncut...
In vehicle tests, wheel force transducers are installed on the wheel. So the force data gathered are mixed with noises in different frequency bands and it is difficult to filter the noises with traditional methods. This paper proposes a new wavelet method with nonlinear threshold control of the wavelet coefficients. The results of an experiment with this method show its correctness and efficiency...
The algorithm for image edge detection based on phase information is getting more and more application in image feature detection. After verifying the importance and stability of phase information in image processing, the importance of phase information and the application in feature detection are discussed, and then, phase congruency function is studied on. With analysing the relation between phase...
Wheel speed is a critical parameter in vehicle roadway test. However, because of the internal defects of the wheel speed sensor structure and some electromagnetic inference, this signal is inevitably influenced by kinds of awful noises during the measurement process. These wide band stochastic noises badly influence the analysis of vehicle performance. It is difficult to eliminate these noises with...
Summary form only given. Shift-variance and computational complexity are bottleneck of existing wavelet-based motion estimation (ME). Moreover, to the best of our knowledge, few works have been reported on wavelet-domain ME of video objects (VOs). In this paper, we present an efficient wavelet-domain approach to ME of arbitrarily shaped VOs.
Shape, as one of the intrinsic features of weapons and the other military equipments, becomes the most important key factor of object recognition upon the different techniques of image formation, and the researches on techniques of image retrieval using contour, the important shape feature, have been a focus of attention in the domain of image engineering. The paper proposes a hierarchical image retrieval...
The improvement of video coding is depended on how to reduce the use of motion compensation prediction residuals (MCPR), which is also called displaced frame difference. This paper has put forward a PSNR scalable image coding method based on bit-plane technique and lifting scheme wavelet. Combining the statistical property of MCPR and HVS property, the method constructs different bit-planes according...
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