Results 41 to 50 of about 20,539 (211)
Comparison of Image Compressions: Analog Transformations
Proceedings, 2020 A comparison between the four most used transforms, the discrete Fourier transform (DFT), discrete cosine transform (DCT), the Walsh–Hadamard transform (WHT) and the Haar-wavelet transform (DWT), for the transmission of analog images, varying their ...
Jose Balsa
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Discrete-time scale-shift approach for wavelet construction and analysis
Results in Applied Mathematics, 2023 We provide a sufficient condition to construct a wavelet family from a purely discrete-time signal. The construction is based on an exact mathematical definition of the scale-shift operator in discrete-time and strongly motivated by a strict equivalence ...
Mor Ngom
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Techniques for Accelerometer Reading Processing on Railway Transport Using Wavelet Transform
Известия высших учебных заведений России: РадиоэлектроникаIntroduction. Safety issues of railway transport are inevitably connected with the condition of railway tracks and railway wheels. Various defects, such as irregularities of the railway track, may lead to emergencies and incidents.
A. M. Boronakhin +4 more
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Nihon Kikai Gakkai ronbunshu, 2015 In this study, in order to verify the effectiveness of the variable-band-filters discrete wavelet transform (VBF-DWT) and construction method of the variable band filter (VBF), a fetal ECG extraction has been carried out and the main results obtained are
Zhong ZHANG +4 more
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Reducing Image Size and Noise Removal in Fast Object Detection using Wavelet Transform Neural Network [PDF]
International Journal of Advanced Design and Manufacturing Technology, 2020 A robot detects its surroundings through camera information and its response requires a high-speed image process. Due to the increasing application of vision systems, various algorithms have been developed to increase speed of image processing.
mahmoud jeddi +2 more
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A Weak SNR Signal Extraction Method for Near-Bit Attitude Parameters Based on DWT
Actuators, 2022 In practice, the near-bit signals are usually accompanied by noises generated by drilling tool vibration and high-speed rotary. This study introduces discrete wavelet transform to a well drilling area and presents a new weal signal extraction algorithm ...
Yanhui Mao +3 more
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Blind digital speech watermarking based on Eigen-value quantization in DWT
Journal of King Saud University: Computer and Information Sciences, 2015 This paper presents a new blind digital speech watermarking technique based on Eigen-value quantization in Discrete Wavelet Transform. Initially, each frame of the digital speech was transformed into the wavelet domain by applying Discrete Wavelet ...
Mohammad Ali Nematollahi +2 more
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Multi - Wavelet Domain Reconstruction of Lost Blocks in Wireless Image Transmission [PDF]
Engineering and Technology Journal, 2005 bstract A fast scheme for multi - wavelet domain interpolation of lost image blocks in wireless image transmission is proposed in this paper . Instead of using common retransmission query protocols , the lost block is reconstructed in the multi - wavelet
Waleed Mahmoud +2 more
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Evaluating The Performance of DWT-DCT Feature Extraction in Guitar Chord Recognition
International Journal of Applied Sciences and Smart TechnologiesThis study presents advancements in audio signal processing techniques, specifically in enhancing the efficiency of guitar chord recognition. It is a continuation of the previous studies, which also aim at minimizing the feature extraction length with ...
Linggo Sumarno
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Research of OFDM communication algorithm of low-voltage power line in coal mine
Gong-kuang zidonghua, 2014 In view of problem that traditional OFDM algorithm based on discrete Fourier transform used in underground low-voltage power lines is prone to produce larger ISI and ICI to influence normal receiving of signal, an OFDM communication algorithm based on ...
WEI Shaoliang +4 more
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