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A time difference of arrival (TDOA) accurate estimation algorithm in noise background was studied. Common TDOA estimation results are mostly integer times of sample interval, which will result in errors of measurement principle. In this paper, the time of arrival (TOA) estimation results based on Haar wavelet transform is taken as initial value firstly. Then, TDOA less than one sample interval is...
with the rapid development of remote sensing technology and application requirements, the volumes of remote sensing image data become more and more large, which brings management of massive image a big test. An improved construction method of remote sensing image pyramid based on wavelet multi-resolution analysis has been researched. Using the multi-resolution analysis and the theory of wavelet decomposition...
Palmprint recognition for identification provides a new scheme for information security. In order to begin with practice and reduce restrictions on the image acquisition, the paper presents independent component analysis full of the better performances to extract the features of the palmprint images on the basis of wavelet transform. It uses the simple nearest neighbor classifier to clarify. It studied...
In the information society, information security is particularly important. Palmprint recognition for identification provides a new scheme for information security. This paper presents a block statistic method for palmprint identification. Firstly, the method denoised region of interest (ROI) of the palmprint with the first-level wavelet decomposition. Then it blocked the low-frequency sub-image....
In the field of electrical power engineering, pattern recognition is commonly used for classification of defects caused of partial discharge (PD) in gas insulated substation (GIS) in order to assess the insulated system in time. As phase information can't be acquired effectively using real wavelet transform for extracting features because of only real coefficients being existed, in this paper, the...
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