نتایج جستجو برای: dwt

تعداد نتایج: 3445  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی و مهندسی 1389

در این پایان نامه عملکرد ber سیستم ofdm و سیستم ofdm مبتنی بر ویولت گسسته ((dwt-ofdm در حالت خطی و در حضور تقویت کننده‏های غیرخطی قدرت ، با هم مقایسه می‏شود. مهم‏ترین اِشکال سیستم‏های چند کاریری حساسیت بالای آنها نسبت به موارد غیر خطی و آفست فرکانس است. در این رساله همچنین ber سیستم ofdm و dwt-ofdm در حضور آفست فرکانس بررسی می‏گردد

2013
K. P. Shashikala K. B. Raja Dayananda Sagar

Palmprint is a physiological biometric trait and is efficient in identifying a person. In this paper we propose Palmprint Identification based on fusion of KWT and DWT at matching Score level (PIFKDM). The palmprint image is preprocessed to generate histogram equalized ROI. The KWT and DWT are applied on preprocessed image. The KWT coefficients and LL band of DWT are considered as features. The...

2016
Roman Starosolski

In order to improve bitrates of lossless JPEG 2000, we propose to modify the discrete wavelet transform (DWT) by skipping selected steps of its computation. We employ a heuristic to construct the skipped steps DWT (SS-DWT) in an image-adaptive way and define fixed SS-DWT variants. For a large and diverse set of images, we find that SS-DWT significantly improves bitrates of non-photographic imag...

2013
V. Revathi Krishna

The digital data can be transformed using Discrete Wavelet Transform (DWT). The images need to be transformed without loosing of information. The Discrete Wavelet Transform (DWT) was based on time-scale representation, which provides efficient multi-resolution. The lifting based DWT are lower computational complexity and reduced memory requirements. The discrete wavelet transform (DWT) is being...

Journal: :Applied Computer Science 2023

Parkinson's disease is a recognizable clinical syndrome with variety of causes and presentations; it represents rapidly growing neurodegenerative disorder. Since about 90 percent sufferers have some form early speech impairment, recent studies on tele diagnosis focused the recognition voice impairments from vowel phonations or subjects' discourse. In this paper, we present new approach for dete...

Journal: :IEEE Transactions on Neural Systems and Rehabilitation Engineering 2021

Objective: Recent advances in development of low-cost single-channel electroencephalography (EEG) headbands have opened new possibilities for applications health monitoring and brain-computer interface (BCI) systems. These recorded EEG signals, however, are often contaminated by eye blink artifacts that can yield the fallacious interpretation brain activity. This paper proposes an efficient alg...

Introduction: Brain visual evoked potential (VEP) signals are commonly known to be accompanied by high levels of background noise typically from the spontaneous background brain activity of electroencephalography (EEG) signals. Material and Methods: A model based on dyadic filter bank, discrete wavelet transform (DWT), and singular value decomposition (SVD) was developed to analyze the raw data...

Journal: :مهندسی برق و الکترونیک ایران 0
h. yaghobi h. rajabi mashhadi k. ansari

this paper presents the application of radial basis neural networks to the development of a novel method for the condition monitoring and fault diagnosis of synchronous generators. in the proposed scheme, flux linkage analysis is used to reach a decision. probabilistic neural network (pnn) and discrete wavelet transform (dwt) are used in design of fault diagnosis system. pnn as main part of thi...

Journal: :Computer Vision and Image Understanding 2008
Turgay Çelik Hüseyin Özkaramanli Hasan Demirel

In this paper, we propose a novel method for facial feature extraction using the directional multiresolution decomposition offered by the complex wavelet transform. The dual-tree implementation of complex wavelet transform offered by Selesnick is used (DT-DWT(S)) [I.W., Selesnick, R.G. Baraniuk, N.C. Kingsbury, The dual-tree complex wavelet transform, IEEE Signal Processing Magazine, 6, s.l., I...

2015
D. AMBIKA

The main goal of this paper is to embed a watermark in the speech signal, using the three techniques such as Discrete Cosine Transform (DCT) along with Singular Value Decomposition (SVD) and Discrete Wavelet Transform (DWT).In this paper, various combinations were tried for embedding the watermark image into the audio signal such as DWT and SVD, DCT with SVD and DCT, DWT with SVD. Their perform...

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