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#5237 implements a Gabor filter for image processing. From the comments and through my own use, the implementation seems to have limited freedom, and also the variances are defined in the original x,y instead of the rotated x', y' directions.

The code is a modified version based on following the conventions and parameters used in...

[G GWINLEN] = genGaborKernelF( MU,NU,sigma,scaleXY,imgSz )
Extract the texture feature using Gabor filter/wavelet. You should first generate cell array G, which is a set of kernels in freq domain, then...

It solves the detection of the vessel. Once you click the mouse on the image of the vessel, the corresponding gabor filter will be shown and the direction of this gabor filter is the direction of the vessel in this point. You can also change the...

Recent studies on Mathematical modeling of visual cortical cells [Kulikowski/Marcelja/Bishop:1982] suggest a tuned band pass filter bank structure. These filters are found to have Gaussian transfer functions in the frequency domain. Thus, taking...

I've made this GUI for a couple of my students, which were learning the Gabor Filtering, and had hard a time to understand the subject. This helped them to get some intuition about what Gabor Filtering is, what are its benefits and what are its...

Useful functions for face recognition research.
The PhD (Pretty Helpful Development functions for) face recognition toolbox is a collection of Matlab functions and scripts intended to help researchers working in the field of face recognition....

A recursive implementation of the Gaussian filter. This implementation yields an infinite impulse response filter that has 6 MADDs per dimension independent of the value of sigma in the Gaussian kernel.

Recursive Gabor filtering for 1D...

Query and filter builder.
The component allows end-users to define queries and filters for single datasets and groups of datasets linked as master-detail or differently. It automatically substitutes the dataset for the generated query and...

Easy Filter Applet is a generic filter that allows people like students, scientists, engineers, ... in "image processing" to show their work in a web interface. It's not a static GUI !! -

Users can interact with filter's...

This script adds to any html table a "filter by column" feature that enables users to filter and limit the data displayed within a long table. It even works on tables with uneven rows.

The script automatically adds a filter...

This script removes the dollar sign ($) and commas (,) from a a text box. It is useful if you require input of only numbers. You may also modify the script to filter out whatever characters you want.

This javascript is a Word Filter. When the user submits some text, the validator will check the text for words that you specify to be filtered. The words that have to be filtered must be added to the array swear_words_arr.

When the user...

This function returns coefficients of Gaussian lowpass filter.
Advantages of Gaussian filter: no ringing or overshoot in time domain.
Diasadvantage: slow rolloff in frequency domain.
Pass SR=sampling rate, fco=cutoff freq, both in...

Savitzky-Golay Smoothing and Differentiation Filter
The Savitzky-Golay smoothing/differentiation filter (i.e., the polynomial smoothing/differentiation filter,
or the least-squares smoothing/differentiation filters)...

Recently needed to see the effects of a CIC decimating filter but realized that with my new license of Matlab, I did not have access to the Filter Design Toolbox. This is a quick attempt at a simulation to re-create the effects of CIC-decimation...

This is a simple demo of a Kalman filter for a sinus wave, it is very commented and is a good approach to start when learning the capabilities of it.


For more information, visit:

Computes the H-infinity optimal causal filter (indirect B-spline filter) for the cubic spline.

d: delay

psi: the optimal filter psi(z) in a TF object
gopt: optimal value

This file is...

Derives the transfer function for digital implementation of a first order RC low pass filter and plots the step and frequency response.
For details, refer to the post: