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21 articles for “wavelet transform”
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Performance Comparison of Retinal Image Enhancement Techniques using Wavelet Transforms
Abstract: Retinal picture getting ready is indispensable in the medical field. Retinal overseeing and picture update are crucial here. At the first stage, Discrete Wavelet Transform (DWT) is used to enhance the image. Here, each sub band is processed differently to enhance the image. Since the issues in retinal image are dazzling and complicated to revive, we can execute the picture of solid retinal image for improvement estimation through a twofold …
Published in International Journal of Analog Integrated Circuits · Vol. 7, Issue 1, 2021 · pp. 1–7 Read article
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A Comprehensive Study of Fault Diagnostics of Roller Bearings Using Continuous Wavelet Transform
Abstract: One of the prominent causes of breakdown of rotating machinery, bearing failure, proves to be costly to the industry. Unexpected machine stoppage disrupts production schedule and maintenance strategies. Therefore, condition monitoring has become a very important research field in recent years. It can be used to avoid unexpected failures of critical systems. Bearing fault diagnostics using vibration signals has proven to be very effective. This paper deals with the fault …
Published in International Journal of Manufacturing and Materials Processing · Vol. 2, Issue 2, 2016 · pp. 36–55 Read article
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Analysing Seismo-electromagnetic Waves through Wavelet Transformation
Abstract: This research has presented a sophisticated methodology for studying lithosphere-ionosphere coupling phenomena, emphasising the identification of pre-seismic activity through seismo-electromagnetic signal processing. The application of an advanced electric field monitoring device, coupled with the precision of the Discrete Wavelet Transform (DWT), has allowed us to uncover nuanced patterns in the ULF range, specifically related to seismic events during the Kumamoto Earthquakes. The detailed statistical analysis further supports the significance of …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 9, Issue 2, 2023 · pp. 10–17 Read article
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Image Denoising Based on Wavelet Transform Using Weighted Highpass Filtering Coefficient and Various Filters
Abstract: Abstract— Image denoising (ID) is a material issue found in various image processing (IP) for preservation of image quality and information. There are numerous technique of denoising image. The most necessary property of ID model is that it should completely reduce noise as much as possible and edge preservation. Various algorithm has been developed in past but still it has scope for enhancement. This paper gives a insight view of …
Published in International Journal of Telecommunications & Emerging Technologies · Vol. 3, Issue 2, 2017 · pp. 1–7 Read article
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Text Data Hiding and Extraction of Image using Discrete Wavelet Transform
Abstract: Now a day with the wide use of multimedia is increasing to a large extent, the visual information that contains the high quality and low complexity digital images plays a very vital role in daily life applications such as satellite television, magnetic resonance imaging, computer tomography, geographical information systems and astronomy and many other areas. Main purpose of this paper is to investigate or develop new concepts to design digital …
Published in International Journal of Digital Communication and Analog Signals · Vol. 1, Issue 1, 2015 · pp. 16–22 Read article
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Hybrid Methodology for Compression of Remote Sensing Imagery Using Huffman and Run-length Coding
Abstract: The remote sensing imagery generated by the onboard sensors of various satellites are contained in several wavelength bands. These bands constitute high resolution that occupy a lot of storage space and memory. Moreover, the downlink transmission to the ground station for these images requires high bandwidth. Therefore, the high-resolution satellite imagery needs to be compressed so that more number of images can be transmitted without any significant loss of information …
Published in International Journal of Image Processing and Pattern Recognition · Vol. 10, Issue 1, 2024 · pp. 17–24 Read article
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ANN Based Power Quality Identification and Classification in Wind Solar Hybrid System
Abstract: With the development of new functionalities solar and wind energy based hybrid system are upcoming energy source with higher efficiency. Solar and wind energy being naturally available in abundance and non-polluting is one of the most promising sources. Due to the development of modern power electronics devices the power quality of wind solar hybrid system gets affected. Hence due to the increasing usage of sensitive electronic equipments in wind solar …
Published in International Journal of Electrical Power System and Technology · Vol. 3, Issue 2, 2017 · pp. 6–11 Read article
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Spectral Analysis of Heart Rate Variability Signals using Stockwell-Transform
Abstract: This paper introduces the use of Stockwell transform (ST) for spectral analysis of heart rate variability (HRV) signals in time-frequency domain. The ST is depicted numerically and compared with well-liked method of wavelet transform known as continuous Morlet wavelet transform (CMWT). The results of this study show that the normalized mean power and total normalized power in VLF (0.004–0.04 Hz), LF (0.04–0.15 Hz) and HF (0.15–0.4 Hz) were improved compared …
Published in International Journal of Digital Communication and Analog Signals · Vol. 1, Issue 2, 2015 · pp. 9–19 Read article
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A Comprehensive Review of AES-Integrated DWT Watermarking Techniques for Image and Video Authentication
Abstract: The exponential growth of digital media production, distribution, and online sharing has intensified the need for reliable mechanisms that ensure image and video authenticity. With the rise of advanced editing tools and deepfake technologies, safeguarding multimedia content from tampering, unauthorized replication, or malicious manipulation has become a critical research challenge. Traditional cryptographic solutions provide confidentiality but fail to maintain post-decryption integrity, whereas watermarking techniques ensure persistent ownership verification but often …
Published in International Journal of Embedded Systems and Emerging Technologies · Vol. 12, Issue 2, 2026 Read article
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Analysis and Implementation of Watermarking with Steganography Using DWT-LSB Technique
Abstract: ABSTRACT The use of images, text and video has become inevitable in today’s rapidly advancing and growing digital world. It has been greatly assisted by the contributions of information technology in bringing about state of the art high speed and secure transmission and reception systems. “Watermarking” is the process of hiding digital information in original data, to increases robustness and security using the different technique like Discrete Wavelet Transform (DWT). …
Published in International Journal of Telecommunications & Emerging Technologies · Vol. 5, Issue 1, 2019 · pp. 10–19 Read article
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Study and Analysis of Robust DCT-2L-DWT-SVD Domain Based Digital Image Watermarking Techniques with Different Attacks Using MATLAB
Abstract: The proposed paper presents a combined technique of Discrete Cosine Transform (DCT), 2level Discrete Wavelet Transform (2L-DWT) and Singular Value Decomposition (SVD) based Digital Image Watermarking (DIW) with dissimilar attacks. In the initial stage, split the original (cover) image into four sub-bands LL,LH,HL,HH which are named according to the filter (high-pass or low-pass), select LL sub-band which is split in to four sub-bands - LL-LL ,LL-LH ,LL-HL, LL-HH using DWT …
Published in International Journal of Image Processing and Pattern Recognition · Vol. 3, Issue 2, 2017 · pp. 10–19 Read article
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Rolling Element Bearing Diagnosis Using Machinery Fault Simulator
Abstract: The paper presents the diagnosis strategy for the rolling element bearing system used in machinery fault simulator (MFS). The concept is generic and it is applicable for most of the system involving bearing sub-system. The MFS details and its various maintenance strategies described. The monitoring of the rolling element bearing (REB), done with the accelerometer sensors. Acquisition of data from the sensor analog voltage to the CPU in digital format …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 2, Issue 1, 2016 · pp. 01–22 Read article
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Improved Approaches of Image Forgery Detection using SURF and 4-level DWT
Abstract: ABSTRACT Today, there are various types of image tampering techniques, and copy-move forgery is one of them in which a piece of the picture is copied and pasted on another part of a picture. The study reviewed the several methods proposed to achieve this goal. This method generally uses both the feature point-based and the block-based algorithm. We use DWT (discrete wavelet transforms) for the decomposition of an image into …
Published in International Journal of Image Processing and Pattern Recognition · Vol. 4, Issue 2, 2018 · pp. 1–8 Read article
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Identifying the Age Using Face Image Using DWT, LBP, SVM and k-NN
Abstract: ABSTRACTThe research related to identifying the age using face images has become progressively more important, due to the fact it has a multiplicity of potentially helpful applications. In this paper we survey the complete age synthesis or age estimation from face images techniques. Automatic facial age identifying is one of the main issues in pattern recognition which shows the age of human according to her/his facial expressions. Basically, age detection/estimation …
Published in International Journal of Image Processing and Pattern Recognition · Vol. 6, Issue 2, 2020 · pp. 26–37 Read article
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Detecting COVID_19 in X-ray images using artificial neural network
Abstract: In this paper, we propose a method for detecting COVID-19, which is most important for now days in lowering mortality rates. COVID-19 had a rapid impact on our daily lives, businesses, and global trade and transportation. Chest CT scans and CT x-rays reveal particular radiographic abnormalities in people with COVID-19 by means of faster and more efficient representation of the patient's lung that enables for the detection of viral phenomena. …
Published in International Journal of Broadband Cellular Communication · Vol. 8, Issue 1, 2022 · pp. 32–38 Read article
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Particle Swarm Optimization to enhance Low Resolution Images
Abstract: In digital image processing enhancement of low resolution images is always a priority field. Construction of high resolution image from low resolution images by using discrete wavelet transform (DWT) to decompose the input low resolution image into several sub band images. The resolution of surveillance video frames can be improved by interpolation between pixels to generate a moderate enhancement. A hybrid novel method is used to enhance low resolution images …
Published in International Journal of Digital Communication and Analog Signals · Vol. 2, Issue 2, 2016 · pp. 17–21 Read article
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Speech Hiding Techniques DWT and LSB Algorithm For Better Security
Abstract: Abstract— The proposed paper presents a comparison analysis between Discrete Wavelet Transform(DWT) and Least Significant Bit (LSB) algorithm such that which algorithm gives better security for host audio file.The LSB algorithm uses only small part(LSB) of complete image while in DWT algorithm we use 2 level DWT for audio and 1 level for audio.So the paper describes the comparison of these methods for speech hiding and extraction on the basis …
Published in International Journal of Telecommunications & Emerging Technologies · Vol. 3, Issue 2, 2017 · pp. 21–29 Read article
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Application of Hybrid Wavelet Packet-ANN in Drought Forecasting
Abstract: Drought is the most catastrophic natural disaster that has disastrous effect on human beings, environment and ecology. It is the most frequent of all the natural hazards. In this study, an attempt has been made to forecast the drought using Artificial Neural Network (ANN) for a lead time of 1-month and 6-month. Further, the pre-processing of data has been carried out using Wavelet Packet transform (WPT) and then the pre-processed …
Published in International Journal of Water Resources Engineering · Vol. 3, Issue 2, 2017 · pp. 70–80 Read article
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Wavelet Analysis for the Calculation of FFT Length Using Digital Signal Processing
Abstract: Introduction of the microprocessor in the late 1970's and early 1980's meant digital signal processing (DSP) techniques could be used in a much wider range of applications. DSP has been used to transform and manipulate analog and digital signals. This paper inculcates the parameters and calculation of fast fourier transform (FFT) length using Spectral and Wavelet Analysis by using Texas Instruments (TMS320C6713) DSP starter kit. DSP chip – a programmable …
Published in International Journal of Analog Integrated Circuits · Vol. 1, Issue 2, 2015 · pp. 1–9 Read article
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Classification of power quality disturbances using advanced deep learning algorithms for Accurate and efficient electrical signal analysis
Abstract: Power systems today have to deal with more and more power quality issues (PQDs) like voltage drops, rises, harmonics, and transients because more people are using renewable energy sources and electronic devices. These problems can hurt equipment, stop services, and lower the overall reliability of power. In real-time settings, traditional detection methods often don't work as quickly or accurately as they should. This paper looks at how deep learning models, …
Published in International Journal of Power Electronics Controllers and Converters · Vol. 12, Issue 2, 2026 Read article