Results 261 to 270 of about 2,157,914 (307)
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Analysis of images by Hadamard optical transform
Applied Optics, 1975The problems of developing an optical system to perform image Hadamard transforms are discussed. The method involves parallel-successive calculations of the elements of the matrix of spectral components resulting from the decomposition of an initial image into Walsh functions.
B E, Krivenkov +2 more
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China Communications, 2018
Non-orthogonal multiple access (NOMA) is a new access method to achieve high performance gains in terms of capacity and throughput, so it is currently under consideration as one of the candidates for fifth generation (5G) technologies.
M. Usman +3 more
semanticscholar +1 more source
Non-orthogonal multiple access (NOMA) is a new access method to achieve high performance gains in terms of capacity and throughput, so it is currently under consideration as one of the candidates for fifth generation (5G) technologies.
M. Usman +3 more
semanticscholar +1 more source
Hadamard-Transform Exhaust-Analysis Spectrometer
Applied Optics, 1971We propose a novel instrument for automobile exhaust analysis based on a Hadamard-transform spectrometer, which would be able to make accurate measurements of the concentration of several pollutants simultaneously, would be operated by unskilled personnel, and would complete a measurement scan in less than 1 sec.
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A blind color image watermarking algorithm based on Hadamard transform and TLBO algorithm
Optik (Stuttgart), 2023Yuedong Xia +4 more
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Real-Time Walsh-Hadamard Transformation
IEEE Transactions on Computers, 1972A technique for obtaining the digital Walsh-Hadamard transform of two-dimensional discrete pictures in real time is presented. A considerable reduction in total time for the transformation of a picture results since the process of scanning and digitizing one picture line overlaps with computations on the previous line. This is accomplished by operating
Alexandridis, Nikitas A., Klinger, Allen
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Quaternion Hadamard Transform and QR Decomposition Based Robust Color Image Watermarking
2019 3rd International Conference on Trends in Electronics and Informatics (ICOEI), 2019A robust watermarking method depending on Quaternion Hadamard Transform (QHT) and QR decomposition is proposed. The QHT can preserve the relationship among the rgb component and color information.
K. Prabha, M J Vaishnavi, I. S. Sam
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Hadamard transform spectrometry
Chemometrics and Intelligent Laboratory Systems, 1991Abstract Dyer, S.A., 1991. Hadamard transform spectrometry. Chemometrics and Intelligent Laboratory Systems, 12: 101–115. Hadamard transform spectrometry (HTS) provides a means of obtaining a multiplex advantage with a dispersive spectrometric technique.
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High Resolution Hadamard Transform Spectrometer
Applied Optics, 1972The ir spectrometer described employs alkaline halide lenses, an echelle grating, and a cryogenically cooled doped germanium bolometer as a detector. It is provided for two possible modes of operation: one is a single slit or conventional scan, the other is a multiplex or Hadamard scan.
Hansen, Peter, Strong, John
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Secure medical image encryption with Walsh–Hadamard transform and lightweight cryptography algorithm
Medical and Biological Engineering and Computing, 2022Ömer Kasım
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Two Asymmetric Hadamard Transform Spectrometers
Applied Optics, 1974We develop the theory of operation for dispersive spectrometers that modulate radiation at both the entrance and exit apertures by means of Hadamard codes. Specifically, we examine the operation of instruments illuminated by a beam of radiation known to be homogeneous.
M, Harwit +3 more
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