Search Results for "discrete cosine transform"
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Showing 31 open source projects for "discrete cosine transform"
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NFFT
The official NFFT library repository
NFFT is a software library, written in C, for computing non-equispaced fast Fourier transforms and related variations. -
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sleef
Vectorized libm
SLEEF stands for SIMD Library for Evaluating Elementary Functions. SLEEF implements vectorized versions of all C99 math functions, that utilize SIMD instructions of modern processors to make computation more efficient. The library also includes vectorized DFT subroutines. -
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We provided a normal method to fit 2/3D open or closed curves. With fitting results, we can make morphometric analyses of some samples. If you have any questions, please contact Shengmin Zhou(email: 2495077522@qq.com or 220180304@seu.edu.cn). If you want to download this project and use it, please cite the paper: Zhou, S., Li, B. & Nie, H. Parametric fitting and morphometric analysis of 3D open curves based on discrete cosine transform. Zoomorphology (2021). https://doi.org/10.1007/s00435...
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libPGF
libPGF is an implementation of the Progressive Graphics File (PGF)
The Progressive Graphics File (PGF) is an efficient image file format, that is based on a fast, discrete wavelet transform with progressive coding features. PGF can be used for lossless and lossy compression. It's most suitable for natural images. PGF can be used as a very efficient and fast replacement of JPEG 2000. -
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vocoder chung is a small educational vocoder using discrete fourier transform FFT spectrum written in easy fast compiled freebasic . (24/12/2019) uses fast and accurate FFTdll.dll (28/03/2020) algorythmic voice cloning / change / morphing experiment added
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VStar
Multi-platform Variable Star Visualisation and Analysis
VStar is a multi-platform, easy-to-use variable star observation visualisation and analysis tool. Data can be read from a file or the AAVSO database, light curves and phase plots created, period analysis performed, and filters applied. Plugins can be developed, e.g. to make additional observation sources available. See also: 1. http://www.aavso.org/vstar-overview 2. http://www.aavso.org/forums/about-aavso/vstar 3. http://dbenn.wordpress.com/category/astronomy-science/vstar 4.... -
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High Accuracy Approx Adder for FPGAs
Approximate Adder for FPGA-based Image Processing Applications
Using Approximate Computing, we have designed an innovative approximate adder with real-world image processing applications. The uploaded project includes its Matlab and Verilog models for result reproduction. This is an ongoing study and we aim to formally publish it for better understanding of viewers. -
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Finite Transform Library
A Library is for Finite Transforms
The Library is for Finite Transforms such as the Number Theoretic Transform (NTT) and Finite Radon Transform (FRT). Current modules include NTTW for NTTs with high resolution (microsecond) timing, basic array and imaging. The transforms are optimised for performance. -
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MACE Algebraic Calculator
MACE is a Mathematical program for Algorithms, Calculations, Equations
... to insert functions intuitively. Moreover Mace has a comprehensive help menu to support the user. MACE has also its own skripting language for the advanced user. MACE can also calculate with complex numbers, integral residue classes and complex differentiable functions. In the latest release MACE has got: + Sequences as variable containers and discrete signals. + A Signal Processing section including the (fast) (inverse) Fourier transform, several filters and fir / iir Systems + bug fixes -
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karaoke chung is a mp3 player version of mp3tomid_chung , using the discrete fourier transform of mp3tomid_chung to add resynthesis special effects to the played mp3 sound (no it's not a karaoke) .It is written in easy fast freebasic ; Otherwise, can be used as an ordinary mp3 player with playlist , speed , repeat ,autovolcomp, equ effects.. .
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rePhase
A loudspeaker phase linearization, EQ and filtering tool
rePhase project has moved to https://rephase.org, please go there to download rephase and to get info, support and updates. rePhase is a FIR generation tool for building fully linear-phase active crossovers with arbitrary slopes. It also let you manually compensate for the phase shifts of your loudspeakers and existing crossovers, be it active or passive. Once generated, the FIR can be applied using any hardware (openDRC, miniSHARC, Najda, ...) or software (foobar, convolver, JRiver,... -
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MSU's Sparse Fourier Repository
The Home of DMSFT, AAFFT, GFFT, and MSFFT.
A collection of sparse Fourier transform codes developed by faculty at MSU. Currently codes for four different prototype sparse FFTs are here: 1.) DMSFT, implemented by Ruochuan Zhang. This is a fast, stable, noise robust, and *fully discrete* improvement on the ideas in GFFT below. It is THE BEST sparse FFT around!!! If you're looking for AAFFT, try this out first. 2.) AAFFT, implemented by Mark Iwen in 2008. This code is easy to use, and documented well, but not implemented very... -
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HPC Challenge
HPC Challenge is an HPC benchmark for memory access patterns
...) - exercises the communications where pairs of processors communicate with each other simultaneously - a useful test of the total communication capacity of the network. (5) RandomAccess - measures the rate of integer random updates of memory (GUPS). (6) FFT - measures the floating point rate of execution of double precision complex one-dimensional Discrete Fourier Transform (DFT). (7) Communication bandwidth and latency test for simultaneous communication patterns. http://icl.cs.utk.edu/hpcc -
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ICE (Interval Calculator for Engineer)
Interval Calculator for Engineer
ICE is a simple mathematical calculator with very useful shortcuts for Engineer: works natively with tolerance, can run Monte Carlo analysis, uses engineer notation, includes most of the day by day functions used by engineers. -
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Brainwave Analyzer
Discrete Fourier Transform of Brainwaves
The Brainwave Analyzer is NOT a finished program. So far it does do Discrete Fourier Transform of brainwaves (very slow), but does not yet do Fast Fourier Transform of brainwaves, nor does it yet calculate frequency. (Later more complete versions should be coming over the next few months.) Written in C# 2010 Access file and csv sample files included. Program assumes that access file is at: C:\Openvibe\OpenVibe.accdb The Brainwave Analyzer is a free open source program written... -
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wavelib
C Implementation of Wavelet Transform (DWT,SWT and MODWT)
Methods Implemented DWT/IDWT A decimated Discrete Wavelet Transform implementation using implicit signal extension and up/downsampling so it is a fast implementation. A FFT based implementation is optional but will not be usually needed. Both periodic and symmetric options are available. SWT/ISWT Stationary Wavelet Transform. It works only for signal lengths that are multiples of 2^J where J is the number of decomposition levels. For signals of other lengths see MODWT implementation... -
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wmtsa-python
Discrete wavelet methods for time series analysis using python
Several python libraries implement discrete wavelet transforms. However, none of them, or at least none that I know, is aimed at scientific use. This library aims at filling this gap, in particular considering discrete wavelet transform as described by Percival and Walden. This module started as translation of the wmtsa Matlab toolbox (http://www.atmos.washington.edu/~wmtsa/), so most naming conventions and most of the code structure follows their choices. The code uses a mix of python... -
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KL1p
A portable C++ library for Compressed Sensing
KL1p is a portable C++ framework for handling sparse recovery of inverse problems of underdetermined linear systems, like in compressed sensing technique. -
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libdwt
a cross-platform discrete wavelet transform library implemented in C
libdwt is a cross-platform discrete wavelet transform library implemented in C language. The library implements fast wavelet transform algorithm using lifting scheme. Cohen-Daubechies-Feauveau wavelets with 4 vanishing moments were used. -
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Fast Matrix for Java
General purpose matrix utilities for Java in Parallel Computing
Fast Matrix for Java (fm4j) is a general-purpose matrix utility library for computing with dense matrices. fm4j encapsulated different underlying implementations and select the optimal one in run-time depending on the size of the input matrix. Moreover, fm4j employs Java (Tm) Concurrency to take advantage of the computation power of multi-cor processors. -
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StFFT
FFT on Structured text
Fast fourier transform algorithm written on IEC-61131-3 Structured text programming language for programmable logic controllers. Algorithm is split-radix FFT. StFFT is iterative contrary to more common recursive approach. Iterative solution was chosen because PLCs don't have support for recursion. For compatibility with as many as possible PLC models, algorithm have dependency only on sine and cosine functions. Dual licenced under LGPL and Commercial licence. For commercial licencing... -
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This program is intended as an educational tool to explain the concept of Discrete Fourier Transform (DFT). It uses the Fast Fourier Transform to calculate the DFT of a given arbitrary time domain signal and plots it graphically.
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LauraDCT
parallel and non-parallel implementation in Java of the Discreet Cosin
A parallel and non-parallel implementation in Java of the Discrete Cosine Transform, which allows for "lossy" compression of image data. The purpose for uploading both implementations was to provide a comparison between the time required to process the blocks of pixels both parallel and and non-parallel model. -
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FFTW
Fast Fourier Transform Library (FFTW)
A C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data. -
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1D/2D Discrete Wavelet Transform fully programmed in Python+Numpy. Homepage : http://wavepy.sourceforge.net