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
Can specify the generator matrix size, claiming wanted Haar transform matrix, size is the number of rows and number of columns, the matrix just tells the program how large you want to, you can directly generate the Haar transform matrix and wants according to the transformation matrix of the wavelet... MatlabMatlab
Ever taken a digital photograph and then found out you had missed the fine details that made the scene so impressive visually? Applying a Photoshop sharpen filter may make the photo appear sharper, but such filters are lossy – they actually reduce the amount of fine detail in t... MatlabMatlab
transformation from stationary reference frame to the rotating reference frame using matalb Simulink
The Park's transformation is a three-phase to two-phase transformation for synchronous machine analysis. It is used to transform the stator variables of a synchronou... MatlabMatlab
This matlab code detects lines in a binary image using common computer vision operation known as the Hough transform. This is just a standard implementaion of Hough transform for lines in order to show how this method works.
Function uses Standar... 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
File features: calculate the polluted sine signal using Wavelet transform , one of the continuous Wavelet transform, scale larger, equivalent to the Fourier transform of the w value is smaller. Used with mean 0and variance 1 sequences of Gaussian random white noise sequences... AudioMatlab
The program to mesh the transformer high quality mesh, and transformer by finite element method to calculate the potentials. FREEFEM++ is used, so that we can all understand not only the power of freefem++ functions, but also to understand the finite element calculation of transformer with a specifi... AlgorithmC++