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Littérature scientifique sur le sujet « Transformée de Walsh »

Auteur : Grafiati
Publié le 25 mai 2024
Mis à jour le 31 juillet 2025

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Articles de revues sur le sujet "Transformée de Walsh"

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Suha, Suliman Mardan, and Taha Hamood Mounir. "New fast Walsh–Hadamard–Hartley transform algorithm." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 2 (2023): 1533–40. https://doi.org/10.11591/ijece.v13i2.pp1533-1540.

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This paper presents an efficient fast Walsh–Hadamard–Hartley transform (FWHT) algorithm that incorporates the computation of the Walsh-Hadamard transform (WHT) with the discrete Hartley transform (DHT) into an orthogonal, unitary single fast transform possesses the block diagonal structure. The proposed algorithm is implemented in an integrated butterfly structure utilizing the sparse matrices factorization approach and the Kronecker (tensor) product technique, which proved a valuable and fast tool for developing and analyzing the proposed algorithm. The proposed approach was disti
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Hu Liang, 胡亮, 胡学娟 Hu Xuejuan, 黄圳鸿 Huang Zhenhong, 徐露 Xu Lu та 连丽津 Lian Lijin. "基于离散Walsh-Hadamard变换和引导滤波的多聚焦图像融合". Laser & Optoelectronics Progress 58, № 22 (2021): 2210003. http://dx.doi.org/10.3788/lop202158.2210003.

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Sasikala, D., and R. Neelaveni. "Correlation Coefficient Measure of Mono and Multimodal Brain Image Registration using Fast Walsh Hadamard Transform." International Journal of Engineering and Technology 3, no. 2 (2011): 154–60. http://dx.doi.org/10.7763/ijet.2011.v3.215.

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Birkeland, Peter. "Supermarkets Transformed: Understanding Organizational and Technological Innovations.John P. Walsh." American Journal of Sociology 100, no. 3 (1994): 845–46. http://dx.doi.org/10.1086/230598.

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Berti, E., F. Chiaraluce, N. E. Evans, and J. J. McKee. "Reduction of Walsh-transformed electrocardiograms by double logarithmic coding." IEEE Transactions on Biomedical Engineering 47, no. 11 (2000): 1543–47. http://dx.doi.org/10.1109/10.880108.

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Jeyasurya, B., and M. Rahman. "Application of Walsh Functions for Microprocessor-Based Transformer Protection." IEEE Transactions on Electromagnetic Compatibility EMC-27, no. 4 (1985): 221–25. http://dx.doi.org/10.1109/temc.1985.304293.

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Vaishali, Suryawanshi, and K. Sarode Tanuja. "Hadamard Walsh space based hybrid technique for image data augmentation." IAES International Journal of Artificial Intelligence (IJ-AI) 14, no. 1 (2025): 538–46. https://doi.org/10.11591/ijai.v14.i1.pp538-546.

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Image data augmentation (IDA) is common when deep learning is used for image classification to address the issue of overfitting. Overfitting occurs when the datasets are small and the deep learning models have a huge capacity. Overfitting models have low training errors but high validation errors and result in poor generalization. Several methods have been researched in this context, but frequency domain-based methods are less explored. In this research, we have explored the Hadamard and Walsh space and developed two hybrid technique for IDA. The proposed techniques use a combination of Hadama
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Magomed-Kasumov, Magomedrasul, та Salikh Magomedov. "Быстрое преобразование Фурье по системе функций, ортогональных по Соболеву и порожденных системой Уолша". Daghestan Electronic Mathematical Reports, № 15 (2021): 55–66. http://dx.doi.org/10.31029/demr.15.5.

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Mustafa, Ziyad Tariq, Alaa Al-Hammami, and Jasim Al-Samarai. "Evaluation of Wavelet Transform Audio Hiding." Iraqi Journal for Computers and Informatics 40, no. 1 (2002): 32–44. http://dx.doi.org/10.25195/ijci.v40i1.224.

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Audio hiding is method for embedding information into an audio signal. It seeks to do so in a robust Fashion, while not perceivably degrading the host signal (coves audio). Hiding data in audio signals presents & varicty of challenges: due in part to the wider dynamic and differential range of the Human Auditory System (HAS) as compared to other senses. Transform are usually used for robust audio hiding (audio watcrmarking). But, the audio hiding process is affected by the type of transform used. Therefore, this paper presents an evaluation of wavelet transform hiding in comprison with scl
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Gorgadze, S. F., Dao Vu Shi та A. V. Ermakova. "Synchronization of M-sequences based on fast Нadamard transform". Radiotehnika i èlektronika 69, № 2 (2024): 122–36. http://dx.doi.org/10.31857/s0033849424020031.

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Options have been developed for constructing circulant matrices of any M-sequence (MS) based on automorphic multiplicative groups of the extended Galois field, constructed using an irreducible primitive polynomial, on the basis of which the original MS is formed. The result of this approach is the identification of new methods for transforming MS circulant matrices to a matrix of Walsh functions, ordered by the powers of the antiderivative element of the field. It is shown for the first time that, depending on the initial conditions of the transformation, a set of any number of any cyclic shif
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Thèses sur le sujet "Transformée de Walsh"

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Flórez, Gutiérrez Antonio. "Improved Techniques in the Cryptanalysis of Symmetric Primitives." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS281.

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Dans cette thèse, on propose des améliorations qui peuvent être appliquées à plusieurs techniques de cryptanalyse de primitives symétriques. On dédie une attention spéciale à la cryptanalyse linéaire, pour laquelle une technique basée sur la transformée de Walsh rapide était déjà connue (Collard et al., ICISC 2007). On introduit une version généralisée de cette attaque, qui permet de l'appliquer pour la récupération de clé considerant plusieurs tours, ainsi que le réduction de la complexité du problème en utilisant par example des informations provénantes du key-schedule. On propose aussi une
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Lazaridis, George. "Image processing using the Walsh transform." Thesis, University of Surrey, 2004. http://epubs.surrey.ac.uk/843950/.

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This thesis presents a new algorithm which can be used to register images of the same or different modalities e.g images with multiple channels such as X-rays, temperature, or elevation or simply images of different spectral bands. In particular, a correlation-based scheme is used, but instead of grey values, it correlates numbers formulated by different combinations of the extracted local Walsh coefficients of the images. Each image patch is expanded in terms of Walsh basis functions. Each Walsh basis function can be thought of as measuring a different aspect of local structure, eg horizontal
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Furis, Mihai Alexandru Johnson Jeremy. "Cache miss analysis of Walsh-Hadamard Transform algorithms /." Philadelphia : Drexel University, 2003. http://dspace.library.drexel.edu/handle/1721.1/109.

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O'Dowd, Timothy R. "Discovery of bent functions using the Fast Walsh Transform." Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5080.

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Approved for public release; distribution is unlimited<br>Linear cryptanalysis attacks are a threat against cryptosystems. These attacks can be defended against by using combiner functions composed of highly nonlinear Boolean functions. Bent functions, which have the highest possible nonlinearity, are uncommon. As the number of variables in a Boolean function increases, bent functions become extremely rare. A method of computing the nonlinearity of Boolean functions using the Fast Walsh Transform (FWT) is presented. The SRC-6 reconfigurable computer allows testing of functions at a much fa
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Davis, Jeffrey H. "A study of potential uses for Walsh transformed images in target recognition." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA292722.

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Desmond, Allan Peter. "An analytical signal transform derived from the Walsh Transform for efficient detection of dual tone multiple frequency (DTMF) signals." Thesis, Bucks New University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401474.

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Sagdicoglu, Serhat. "Cryptological Viewpoint Of Boolean Functions." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1082403/index.pdf.

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Boolean functions are the main building blocks of most cipher systems. Various aspects of their cryptological characteristics are examined and investigated by many researchers from different fields. This thesis has no claim to obtain original results but consists in an attempt at giving a unified survey of the main results of the subject. In this thesis, the theory of boolean functions is presented in details, emphasizing some important cryptological properties such as balance, nonlinearity, strict avalanche criterion and propagation criterion. After presenting many results about these criteri
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RAJYALAKSHMI, P. S., and R. K. RAJANGAM. "DATA COMPRESSION SYSTEM FOR VIDEO IMAGES." International Foundation for Telemetering, 1986. http://hdl.handle.net/10150/615539.

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International Telemetering Conference Proceedings / October 13-16, 1986 / Riviera Hotel, Las Vegas, Nevada<br>In most transmission channels, bandwidth is at a premium and an important attribute of any good digital signalling scheme is to optimally utilise the bandwidth for transmitting the information. The Data Compression System in this way plays a significant role in the transmission of picture data from any Remote Sensing Satellite by exploiting the statistical properties of the imagery. The data rate required for transmission to ground can be reduced by using suitable compression technique
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Ahmed, Kamal Ali. "Digital watermarking of still images." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/digital-watermarking-of-still-images(0dc4b146-3d97-458f-9506-8c67bc3a155b).html.

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This thesis presents novel research work on copyright protection of grey scale and colour digital images. New blind frequency domain watermarking algorithms using one dimensional and two dimensional Walsh coding were developed. Handwritten signatures and mobile phone numbers were used in this project as watermarks. In this research eight algorithms were developed based on the DCT using 1D and 2D Walsh coding. These algorithms used the low frequency coefficients of the 8 × 8 DCT blocks for embedding. A shuffle process was used in the watermarking algorithms to increase the robustness against th
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El, Omer. "Avalanche Properties And Randomness Of The Twofish Cipher." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605571/index.pdf.

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In this thesis, one finalist cipher of the Advanced Encryption Standard (AES) block cipher contest, Twofish proposed by Schneier et al, is studied in order to observe the validity of the statement made by Arikan about the randomness of the cipher, which contradicts National Institute of Standards and Technology (NIST)&rsquo<br>s results. The strength of the cipher to cryptanalytic attacks is investigated by measuring its randomness according to the avalanche criterion. The avalanche criterion results are compared with those of the Statistical Test Suite of the NIST and discrepancies in the sec
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Livres sur le sujet "Transformée de Walsh"

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Golubov, B., A. Efimov, and V. Skvortsov. Walsh Series and Transforms. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3288-6.

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V, Efimov A., and Skvort͡s︡ov V. A, eds. Walsh series and transforms: Theory and applications. Kluwer Academic Publishers, 1991.

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Golubov, B. Walsh Series and Transforms: Theory and Applications. Springer Netherlands, 1991.

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Walsh Series and Transforms. Island Press, 1991.

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Golubov, B., V. Skvortsov, and A. Efimov. Walsh Series and Transforms: Theory and Applications. Springer Netherlands, 2012.

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Chapitres de livres sur le sujet "Transformée de Walsh"

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Klapper, Andrew, and Mark Goresky. "A With-Carry Walsh Transform." In Sequences and Their Applications – SETA 2010. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15874-2_18.

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Wu, Chuan-Kun, and Dengguo Feng. "Boolean Functions and Their Walsh Transforms." In Advances in Computer Science and Technology. Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-48865-2_1.

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Golubov, Boris I. "Dyadic Derivative and Walsh-Fourier Transform." In Dyadic Walsh Analysis from 1924 Onwards Walsh-Gibbs-Butzer Dyadic Differentiation in Science Volume 1 Foundations. Atlantis Press, 2015. http://dx.doi.org/10.2991/978-94-6239-160-4_11.

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Arndt, Jörg. "The Walsh transform and its relatives." In Matters Computational. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14764-7_23.

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Klapper, Andrew. "Arithmetic Walsh Transform of Quadratic Boolean Functions." In Lecture Notes in Computer Science. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-30615-0_6.

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Srivastva, Ranjeet, and Yogendra Narain Singh. "ECG Biometric Analysis Using Walsh–Hadamard Transform." In Advances in Data and Information Sciences. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8360-0_19.

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Jin, Wengang, Xiaoni Du, Jinxia Hu, and Yanzhong Sun. "Boolean Functions with a Few Walsh Transform Values." In Advances in Artificial Intelligence and Security. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78618-2_53.

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Lakshmanan, Chithra, Divya Shree Mylapur Parthasarathi, Harshini Veliappan, Harini Sasikumar, and Pirumala Parameshwari. "Discrete wavelet transform and Fast Walsh-Hadamard transform based digital image watermarking." In Hybrid and Advanced Technologies. CRC Press, 2025. https://doi.org/10.1201/9781003559139-55.

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Diana Andrushia, A., and R. Thangarjan. "Saliency-Based Image Compression Using Walsh–Hadamard Transform (WHT)." In Biologically Rationalized Computing Techniques For Image Processing Applications. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61316-1_2.

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Prabu, Ramachandran Thandaiah, Cinthuja Kaliyamoorthy, Ganesan Baby Saral, Monica Rajasekaran, and Benisha Maria Xavier. "Hybrid watermarking scheme: Walsh-Hadamard transform and SVD integration." In Hybrid and Advanced Technologies. CRC Press, 2025. https://doi.org/10.1201/9781003559139-56.

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Actes de conférences sur le sujet "Transformée de Walsh"

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Tian, Jing, Huai-Zhi Pei, Sheng-Guang Ren, et al. "High-speed Memristive Walsh-Hadamard Transform for Image Compression." In 2024 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA). IEEE, 2024. https://doi.org/10.1109/icta64028.2024.10860475.

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Tian, Jing, Huai-Zhi Pei, Jian-Cong Li, et al. "Scalable In-Memory Walsh-Hadamard Transform for Image Compression." In 2025 9th IEEE Electron Devices Technology & Manufacturing Conference (EDTM). IEEE, 2025. https://doi.org/10.1109/edtm61175.2025.11041493.

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Antonietti, Leonardo, Rodrigo Lopes, Morgana da Rosa, Eloisa Barros, Eduardo da Costa, and Rafael Soares. "Exploring Approximate Adders for Energy-Efficient Discrete Walsh-Hadamard Transform." In 2025 IEEE 16th Latin America Symposium on Circuits and Systems (LASCAS). IEEE, 2025. https://doi.org/10.1109/lascas64004.2025.10966350.

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Uri, Joseph B. "The Cormack - Walsh Transform." In 14th Congress of the International Commission for Optics, edited by Henri H. Arsenault. SPIE, 1987. http://dx.doi.org/10.1117/12.967374.

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Glasser, Adrian, and Howard C. Howland. "Artistic transformations in image processing." In OSA Annual Meeting. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/oam.1986.thn9.

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We have examined certain transformations, linear and nonlinear, which transform frame-grabbed black-and-white photographic images into artistic renditions of the original. Such transforms resemble sketches, sketch and wash renditions, or mosaics. Generally these transforms involve a large reduction in information of the original photographic image, and we have attempted to measure this reduction using coding algorithms. The reverse, increase in information when an artist creates a painting from a sketch, was also evaluated. Lastly, we also studied the importance of the information retained and
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Irion, Jeff, and Naoki Saito. "The generalized Haar-Walsh transform." In 2014 IEEE Statistical Signal Processing Workshop (SSP). IEEE, 2014. http://dx.doi.org/10.1109/ssp.2014.6884678.

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Ben Uri, Joseph. "Coded holography for Walsh transform and Haar transform." In Holographics International '92, edited by Yuri N. Denisyuk and Frank Wyrowski. SPIE, 1993. http://dx.doi.org/10.1117/12.140399.

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Lee, Man Hee, Muhammad Basit Shahab, Md Fazlul Kader, and Soo Young Shin. "Spatial multiplexing using walsh-hadamard transform." In 2016 International Conference on Smart Green Technology in Electrical and Information Systems (ICSGTEIS). IEEE, 2016. http://dx.doi.org/10.1109/icsgteis.2016.7885764.

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Falkowski, Bogdan J., and Shixing Yan. "Ternary Walsh spectral transform decision diagrams." In 2007 6th International Conference on Information, Communications & Signal Processing. IEEE, 2007. http://dx.doi.org/10.1109/icics.2007.4449769.

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Lu, Yi. "Practical tera-scale Walsh-Hadamard Transform." In 2016 Future Technologies Conference (FTC). IEEE, 2016. http://dx.doi.org/10.1109/ftc.2016.7821757.

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Rapports d'organisations sur le sujet "Transformée de Walsh"

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Liberty, Edo, Nir Ailon, and Amit Singer. Fast Random Projections Using Lean Walsh Transforms. Defense Technical Information Center, 2007. http://dx.doi.org/10.21236/ada489771.

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