Results 1 to 10 of about 2,511,720 (249)

Short-Time Fourier Transform with the Window Size Fixed in the Frequency Domain (STFT-FD): Implementation

open access: yesSoftwareX, 2018
The Short-Time Fourier Transform (STFT) is widely used to convert signals from the time domain into a time–frequency representation. This representation has well known limitations regarding time–frequency resolution.
Carlos Mateo, Juan Antonio Talavera
doaj   +3 more sources

A Novel No-Reference Quality Assessment Metric for Stereoscopic Images with Consideration of Comprehensive 3D Quality Information

open access: yesSensors, 2023
Recently, stereoscopic image quality assessment has attracted a lot attention. However, compared with 2D image quality assessment, it is much more difficult to assess the quality of stereoscopic images due to the lack of understanding of 3D visual ...
Liquan Shen   +4 more
doaj   +1 more source

Intelligent Healthcare System Using Patients Confidential Data Communication in Electrocardiogram Signals

open access: yesFrontiers in Aging Neuroscience, 2022
With the advent of the aging era, healthcare and elderly care have become the focus of medical care, especially the care of the elderly with dementia.
Ming Zhao   +7 more
doaj   +1 more source

Patient Confidential Data Hiding and Transmission System Using Amplitude Quantization in the Frequency Domain of ECG Signals

open access: yesSensors, 2023
The transform domain provides a useful tool in the field of confidential data hiding and protection. In order to protect and transmit patients’ information and competence, this study develops an amplitude quantization system in a transform domain by ...
Shuo-Tsung Chen   +6 more
doaj   +1 more source

Statistical Analysis of Local Gradient in Mel Transform Domain for Parkinson’s Dysphonia [PDF]

open access: yesJisuanji kexue yu tansuo, 2022
Dysphonia analysis of Parkinson’s disease is the basis of information analysis for early diagnosis of Parkinson’s disease based on speech.
ZHANG Tao, LIN Liqin, ZHANG Yajuan, NIU Xiaoxia
doaj   +1 more source

Overview of Image Denoising Methods

open access: yesJisuanji kexue yu tansuo, 2021
In real scenes, due to the imperfections of equipment and systems or the existence of low-light environments, the collected images are noisy. The images will also be affected by additional noise during the compression and transmission process, which will
LIU Liping, QIAO Lele, JIANG Liucheng
doaj   +1 more source

Multi-Focus Image Fusion: Algorithms, Evaluation, and a Library

open access: yesJournal of Imaging, 2020
Image fusion is a process that integrates similar types of images collected from heterogeneous sources into one image in which the information is more definite and certain.
Rabia Zafar   +2 more
doaj   +1 more source

Conditional Random Field-Guided Multi-Focus Image Fusion

open access: yesJournal of Imaging, 2022
Multi-Focus image fusion is of great importance in order to cope with the limited Depth-of-Field of optical lenses. Since input images contain noise, multi-focus image fusion methods that support denoising are important.
Odysseas Bouzos   +2 more
doaj   +1 more source

Transform domain CPtNLMS algorithms [PDF]

open access: yes2013 47th Annual Conference on Information Sciences and Systems (CISS), 2013
The concept of self-orthogonalizing adaptation is extended from the least mean square algorithm to the general case of complex proportionate type normalized least mean square algorithms. The derived algorithm requires knowledge of the input signal's covariance matrix.
Wagner, Kevin T., Doroslovacki, Milos I.
openaire   +2 more sources

Speech Encryption Based on Wavelet Transformation and Chaotic Map [PDF]

open access: yesEngineering and Technology Journal, 2016
In this paper a new algorithm is presented for speech encryption. It includes dividing the speech signal into overlapped blocks then shuffling those blocks in the time domain. A second permutation is done for the coefficients of the block which generated
Hala B.Abdul Wahab, Sundus I. Mahdi
doaj   +1 more source

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