JPEG-based computing by Boris

This is a function to test a JPEG-based encoding/decoding algorithm (demo, image processing, compression)

entropy_cod( input_matrix, n)

get_quantization( q )

huffman_cod( input_matrix)

Compression (shannon fano) by John Diaz

Compression (shannon fano) gui (communications, demo, gui)

codificacion(varargin)

Byte encoding utilities by Kota Yamaguchi

Matlab utilities to encode/decode Base64 string and GZIP bytes. (data import, encode, base64)

base64decode(input)

base64encode(input)

gzipdecode(input)

Read and write miniSEED file by François Beauducel

Imports and exports data files in seismological format "mini-SEED" (data import, miniseed, geophysics)

mkmseed.m

rdmseed.m

Speech Processing Toolbox by Ankitkumar Chheda

Speech Processing Operation like FADE-IN, FADE-OUT, COMPRESSION AND AMPLIFICATION (fade in, fade out, amplification)

GUI_exp4_new(varargin)

MATLAB Implementation of Harmonic ANalysis of Time Series (HANTS) by Mohammad Abouali

Harmonic ANalysis of Time Series (HANTS) (harmonic analysis, c, compression)

[Data]=ReconstructImage(amp,phi,nb)

[amp,phi,yr]=HANTS(ni,nb,nf,y,ts,HiLo,low,high,fet,dod,delt...

[yOut, amp, phi]=ApplyHants(y,nb,nf,fet,dod,HiLo,low,high,d...

Wavelet Decomposition For Images by Michael Chan

The demo decouples the wavelet operations from the plotting. (denoising, transform, compression)

PSNR(A,B)

displayResultantWaveletImages(A, H, V, D, levelOfDecomposit...

observeWaveletDecompositionBenchmark_N_levels.m

Levenstein Coding by Marcos Bolanos

This code implements the Levenstein universal coding method. (information theory, channel coding, levenstein)

Levenstein.m

SPIHT by Kanchi

SPIHT matlab code (without Arithmatic coding stage) (spiht wavelet image c..., compression, ccsds)

func_DWT(I, level, Lo_D, Hi_D);

func_InvDWT(I_W, S, Lo_R, Hi_R, level);

func_MyDescendant(i, j, type, m)

colormap_adjust by W. Owen Brimijoin

This function adjusts the contrast of the selected colormap using a hyperbolic sine transformation. (colormap, printing, compression)

colormap_adjust(scale,varargin)

aztec algorithim by abhijith bailur

compression of ecg using aztec (compression, aztec, ecg)

abhiaztec.m

FAN ALGORITHIM by abhijith bailur

commpression of ECG using FAn algorithim (ecg, compression, fan algorithim)

abhi_Fan_Algorithm.m

Example of Lempel Ziv coding by Andrea Cirillo

It's a Matlab function to codify a string of chars with Lempel-Ziv compression algorithm. (communications, signal processing, compression)

lempel_ziv(alfabeto, stringa)

Wavelets and fractals: where the 2 techniques meet by Alexey Borovoy

In this submission a unique position of Haar wavelet in image processing is revealed. (haar, wavelet, fractal)

compare(N)

hwdt(x)

Arithmetic code to encode a string of char. by Andrea Cirillo

Arithmetic code to encode a string of char. (signal processing, coding, compression)

res=arithmetic_code(alphabet, distr_pr, string)

JPEG compression by Anna DB

A program in order to see how the JPEG method works. (compression, image processing, cosine transform)

compressione.m

compressione_help(varargin)

Image processing laboratory by Francesco Pizzo

An application with an intuitive GUI that you can use for some image processing exercises. (gui, jpeg transform, color balancing filte...)

compression(varargin)

compression_type.m

equalizza.m

Quadtree decomposition (Encoding) and Decoding of RGB Image by Dr. Murtaza Khan

Quadtree decomposition (Encoding) and Decoding of RGB Image of size M-by-N-by-3. (compression, rgb, image)

A =padtomakepowof2(A,varargin)

I=qtreedecode(S,values)

I=qtreergbdecode(S,valRGB)

Compression Routines by Jesse Hopkins

Compress Matlab variables in the workspace. (supports cells, structs, matrices, strings, objects) (compression java, compression)

CompressLib

packableObject

jpeg encoder by karan anand

yup this creates a jpeg file (encode, jpeg, codec)

colorspace(Conversion,varargin)

jpegfulto.m

jpegfulto_old.m

Zig-Zag scan by Damilola Ogunbiyi

Zig-zag and inverse zig-zag scan as used in Image Processing's JPEG compression. (compression, matlab, jpeg)

out=invzigzag(in,num_rows,num_cols)

out=zigzag(in)

NIST (ANSI/NIST-ITL 1-2000) library (for Windows) by Cognaxon Software

Read and writes files in ANSI/NIST-ITL 1-2000 format. (ansinistitl 12000, ansinistitl 12007, wsq)

nist_demo_Create_and_Insert.m

nist_demo_Delete_Single_Field.m

nist_demo_Read_Single_Field.m

SparsePack by Sebastiaan

Packs a sparse matrix into a single uint8 array, reducing memory usage. (sparse, compression)

testSparsePack(NumTests, MemLim, Fake32)

SparsePack.m

SparseUnPack.m

A Numerical Tour of Signal Processing by Gabriel Peyre

A set of Matlab experiments that illustrates advanced computational signal and image processing. (approximation, wavelets, denoising)

[p,ellipse]=phantom(varargin)

b=dct(a,n)

b=dct2(arg1,mrows,ncols)

Fast function to save a matrix by Arvid Bottiger

write_matrix_bin(f,m) is a fats way to save a matrix of arbitrary size and dimension. (optimization, data, export)

read_matrix_bin( filename, varargin )

write_matrix_bin( filename, matrix, varargin )

Fast Import of Compressed Binary .RAW Files Created with LTspice Circuit Simulator by Paul Wagner

Loads .raw simulation files created with LTspice (a free circuit simulation tool). (circuit simulation, binary, ltspice)

LTspice2Matlab( filename, varargin )

Samplify Sampled Data Compression by Al Wegener

Samplify compresses samples used by A/D and D/A converters (dsp, compression, compress)

desamplify(x, opt)

desamplifyFile(infile, outfile)

rateDist(x, opt, dB)

Scalable MPEG compression based on DCT coefficients by Zahid Ali

This application makes 2 layers base Layer and enhancement layer from quantized coefficients (layers, image processin, dct)

BmotionEstARPS(imgP, imgI, mbSize, p)

BmotionEstARPS(imgP, imgI, mbSize, p)

BmotionEstARPS(imgP, imgI, mbSize, p)

Rudimental compression algorithms for 2D matlab plots by Francesco Pozzi

Rudimental compression algorithms for 2D matlab plots (make eps images small for your LaTeX docs!) (compression, resolution, plot)

compress2D(x, y, width, height, alpha)

compress2Dh(x, y, width, height, alpha)

Image Compression using Wavelet by Jebakumari Beulah

This code compress the image using wavelets. Both gray scale and RGB images can be applied and some (code, compress, compression)

wavecompression.m

WAVELET BASED IMAGE COMPRESSION AND SUB-BAND CODING by Krishna Mohan chowdary Adusumilli

Wavelets are used both in compression and coding (compression, image compression, subband coding)

CODE.m

Adaptive Huffman Coding by Matt Clarkson

Adaptive Huffman Encoding/Decoding for 1D arrays of 8 or 16bit unsigned integers (adaptive huffman codi..., compression)

adaptivehuffman(stream,type)

Visualization of Huffman Encoding Trees by Jason Agron

Simple program that builds and visualizes a huffman encoding tree for a user-defined string (visualize, encoding, huffman)

Huffman Encoding Example

image compression using run length ecoding by Shoeb Temrikar

rle application to image compression (rle, binray, image compression)

rlemain.m

EZW (Embedded Zerotree Wavelet) by Kanchi

Matlab implementation of EZW (Embedded Zerotree Wavelet) (compression, ezw, embedded zerotree)

func_DWT(I, level, Lo_D, Hi_D);

func_InvDWT(I_W, S, Lo_R, Hi_R, level);

func_Myappcoef2(c,s,varargin)

mpeg compression by Zahid Ali

Mpeg compression (compression, image processing, mpeg compression)

BmotionEstARPS(imgP, imgI, mbSize, p)

BmotionEstARPS(imgP, imgI, mbSize, p)

BmotionEstDS(imgP, imgI, mbSize, p)

Prediction with Partial Match (PPM) by Min Kyeong Lee

The context-based compression (compression, ppm, prediction with parti...)

ppm.m

LZW encoder/decoder by Claudiu Giurumescu

Implements a TIF compatible LZW encoding/decoding algorithm (lzw, encoder, compression)

Example.m

WSQ image library (for fingerprints) v.2.8 by Cognaxon Software

Reads and converts WSQ (FBI's Wavelet Scalar Quantization) and 31 other formats. (compression, wsq, wavelet scalar quanti...)

wsq_demo.m

Wavelet based image compression using segmentation by THAYAMMAL SUBBURAJ

The optimal wavelet function in wavelet based image compression system was examined using different (compression, image compression, wavelet)

Bior11.m

Bior11.m

Bior11.m

2-D DCT/IDCT for JPEG Compression by Ahmed Samieh

Fast Implementation of 8X8 DCT/IDCT for JPEG Compression (2d dct, jpeg, dct2)

DCT_8X8(I)

IDCT_8X8(I)

JPEG Encoder Decoder by Muhammad Anwarul Azim

image encode/decode using DCT, quantization, zigzag reordering & run-level coding of JPEG standard (compression, jpeg encode decode, thank)

jpeg

Another LZW compression algorithm by Haiyong Xu

Simple LZW algorithm implementation. (image processing, implementation, algorithm)

norm2lzw(vector)

Wavelet Fractal compression by Muhammad Reza nasiri avanaki

it is proposed an efficient approach for compression microarray images. It is utilized a hybrid wave (compression, wavelet fractal compr..., buried fractal compre...)

wavelet_fractal_compressor.m

Speech compression using Linear Predictive Coding by Hamza Kadir

A lossy speech compression algorithm. (audio processing, compression, linear predictive cod...)

f_DECODER (aCoeff, pitch_plot, voiced, gain);

f_ENCODER(x, fs, M);

f_GAIN (e, voiced_b, pitch_plot_b); %gain of 1 (current) fr...

Compression Ratio by Madhu S. Nair

Get the compression ratio (image compression rat..., compression, image)

assign1.m

IMAGE COMPRESSION & RECONSTRUCTION OF IMAGES by BABY VIJILIN

PROGRAM DECOMPOSE IMAGE,COMPRESS IT, RECONSTRUCTION IS PERFORMED. (compression, reconstruction, quality)

PQS=pqs(A,B,blok)

vi2.m

3D-SPIHT by DIONYSIOS ATHANASOPOULOS

The 3D Set Partitioning In Hierarchical Trees Matlab Code (ima, hierarchy, 3dspiht)

SPIHT_main(nFrame,filename)

func_DWT(I, level, type);

func_Descendant(i, j, k, type, M)

JPEG Compression by Farhat Masood

This program clears the jpeg compression (coding theory, information theory, jpeg)

jpeg

Run Length Encoding of SPIHT by Ravi Lakkundi

SPIHT Run length encoded (compression, spiht, wavelet image compres...)