Scale-invariant feature transform (or SIFT) is an algorithm in computer vision to detect and describe local features in images. The algorithm was published by David Lowe in 1999.
Applications include object recognition , robotic mapping and navigation, image stitching , 3D modeling , ge... Image ProcessingC++
dwt - digitized/discrete wavelet transform for image feature extraction. is a good feature extraction method for audio and 1 D signal too. uploader do not claim any copyright. download and use it on your own risk. digital wavelet transform or DWT is very similar to its countinuous counterpart namely... MatlabMatlab
the Project aim is to design DCT and IDCT in VHDL. DCT is used in image compression to compress the JPEG image. This file contains DCT and IDCT blocks and top module which integrates two blocks and testbench to test the two modules.... vhdlVHDL
Transofmation of map sheets. Data load from .txt, then transform map cornes by afine transformation, similarity transformation, polynomial transformation and 5-element afine transformation.... MatlabMatlab
A discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies. DCTs are important to numerous applications in science and engineering, from lossy compression of audio (e.g. MP3) and images (e.g. JPEG) (where sm... MatlabMatlab
This Matlab script/application performs a 2D Gabor Wavelet transform on an arbitrary image,
displays the resulting transform, and then performs the inverse transform
*slowly* and *sequentially* in animation, so that one can see how the original
image is synthesized back by summing many Gabor wave... MatlabMatlab
2 Dimensional generic Fourier transform
% [ima_out] = fft2(ima_in,direction)
% This function calculates the complex Fourier transform
% of the input image ima_in. If direction is set to 1, the direct fft
% is performed, otherwise, the inverse one performed.
% ima_in : input image. Can... MatlabMatlab
MATLAB implementation of nine-sevenths bi-orthogonal Wavelet transform, breaks up an image into the-MATLAB realize 9/7 biorthogonal Wavelet transform in the frequency domain, and the image is decomposed into the frequency domain. Aimed at strengthening the bi-orthogonal Wavelet denoising function... MatlabMatlab
% This script program is a subroutine to be called in the EP
% while count <= 100;
% The following program is used to generate 20 random numbers 1 at a time
% Every time a random number is g... MatlabMatlab
Fast Fourier transformation is a well-known common method of calculating various practical problems af different kinds.
Most commonly it uses calculation complexity reduction by systolic decomposition.
The applied sample shows how to design a 60 Hz filter to eliminate the respective freq... Algorithm fftDelphi
You are given an image and you are to do histogram equalization. For this you need transformation that takes input as given image and outputs equalized histogram and hence giving new image.... WindowsMatlab
The m-file frft.m computes the fast fractional Fourier transform following the algorithm of 
The m-file frft2.m computes the fast fractional Fourier transform following the algorithm of  (see also  for details)
The m-file frft22d.m computes a 2D transform
based on the 1D routin... MatlabMatlab
%FUNCTIONS FOR 2-D SEQUENCY(WALSH),DYADIC(PALEY) AND
%NATURAL(HADAMARD)ORDERED FAST WALSH-HADAMARD transform
function xx = fwht2d(xx)
% The function implement the 2D fast Walsh-Had... MatlabMatlab