Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 14 of 14 for “"Hadamard transform"”.
-
The use of Hadamard Transform as a data compression technique in the development of a 3-dimensional fluorescence spectral library for qualitative analysis
… compression techniques developed utilize the Hadamard Transform and the modified zero-crossing clipping algorithm. The spectral search technique utilizes the unique format of the compressed and clipped data to greatly accelerate spectrum identification. To demonstrate the feasibility of this …
-
Novel Fast Algorithms For Low Rank Matrix Approximation
… range of an input matrix. Dimension reduction transforms are obtained by means of multiplication of an input matrix by one or more matrices which can be orthogonal, random, and allowing fast multiplication by a vector. The Subsampled Randomized Hadamard Transform (SRHT) is the most popular …
-
Complexity adaptation in video encoders for power limited platforms
… VBS partitioning algorithm based on the Walsh Hadamard Transform (WHT) is presented. The key idea is to segment regions of an image as edges or flat regions based on the fact that prediction errors are mainly affected by edges. Secondly, a fast motion estimation algorithm called Fast Walsh …
-
A tomographic ocean sound speed profile from a long veritcal acoustic array
… cross-correlation algorithm based on the Hadamard transform is used. In addition, wide band Doppler correction and coherent averaging of repetitions of the signal are performed. The tomographic inversion is initialized from a range averaged climatological profile. Multipaths are identified …
-
Shape Up: Peak -Power Reduction via Constellation Shaping
… an O( N log2N) algorithm using a discrete Hadamard transform-based OFDM and introduce a method for incorporating arbitrary lattice codes inside the shaped boundary.
-
Signal Processing Techniques Applied to Biomedical Diagnostics
… amplifier (LIA) based on the Fast Walsh-Hadamard Transform (FWHT), and evaluate its ability to boost the signal-to-noise ratio of optical fluorescence signals. The LIA is designed to be resilient in challenging environments containing high/unpredictable ambient noise. We then develop two …
-
Hadamard transformcoding of television signals. A theoretical investigation of the adaptive coding of Hadamard transformed television signals. The use of computable objective measures for the assessment of local subpicture characteristics in selecting appropriate coders.
… characteristics of television subpictures in a Hadamard transform multicoder scheme is stated and discussed. Detailed investigations of transform domain coefficient statistical characteristics for different test images have been conducted. Both monochrome and colour signals were used, as well as …
-
Essays in Problems in Sequential Decisions and Large-Scale Randomized Algorithms
… \textit{Guluru}, based on subsampled randomized Hadamard transform, to solve a wide class of generalized linear models.
-
Digital image compression.
… structure in a transmission domain, using the Hadamard transform as a kernel. Good compression has been achieved from this scheme, particularly for images with low detail. The second scheme uses a learning automata to predict the probability distribution of the grey levels of an image related …
-
Generalized DFT: extensions in communications
Discrete Fourier Transform (DFT) is a restricted version of Generalized DFT (GDFT) which offers a very limited number of sets to be used in a multicarrier communication system. In contrast, as an extension on Discrete Fourier Transform (DFT) from the linear phase to non-linear phase, the proposed …
-
Improveing F-beta Score in Classifying Shark Data into Shark Behaviors
… the data, from which pre-processed Fast Fourier Transform (FFT), Walsh-Hadamard Transform (WHT), and Autocorrelation (AC) features are extracted then classified using Convolutional Neural Network (CNN) and K-Nearest Neighbors (K-NN). All the combinations of the two balancing techniques, the three …
-
Source modulated multiplexed hyperspectral imaging: Theory, hardware and application
… entries. The theory of multiplexing using the Hadamard matrices is developed. Results from prior art are incorporated into a singular notational system under which the different Hadamard matrices are compared with each other and with acquisition of data without multiplexing (pointwise …
-
Light as a universal tool : Microcapsule sizing by elastic light scattering and mineral investigation by in situ Raman spectroscopy
… (AOTF) and the other based on a dispersive hadamard transform spectrometer are compared to each other. The actual breadboard setup with the detailed description of the components follows in Section 7.3. Further de-velopment of a Raman spectrometer for planetary investigations is proposed in …