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 Hough Transform Algorithm 

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This Hough transform is highly optimized. It uses the midpoint circle algorithm to draw the circles in voting space quickly and without gaps. It also includes an option for searching only part of the image to increase speed if a rough estimate of the circle locations is known.



Circular Hough transform based on the gradient field of an image.
1. Operates on grayscale images, NOT B/W bitmaps.
2. NO loops in the implementation of Circular Hough transform, which means faster operation but at the same time larger...



Hough transform for circles in any size.
returns a list of all circles found
(position and radius) in an RGB image.

includes function for:
drawing a circle on an image.
finding the maximum points in a 1d signal.



HOUGHCIRCLES detects multiple disks (coins) in an image using Hough Transform. The image contains separating, touching, or overlapping disks whose centers may be in or out of the image.

Syntax
houghcircles(im, minR, maxR);
...



Using Hough Transform to detect circles in a binary image



Computes by using the FFT (fast Fourier transform) algorithm the covolution of two discrete sequences.



EDFT (Extended Discrete Fourier Transform) algorithm produces N-point DFT of sequence X where N is greater than the length of input data. Unlike the Fast Fourier Transform (FFT), where unknown readings outside of X are zero-padded, the EDFT...



Noisy environments make difficult the pattern recognition tasks. In this sense, and due to the artifacts that are present in the acquisition process, the most of the biomedical images (i.e. coming from magnetic resonance tests) become noisy and it...



This Face Recognition System uses Kekre Transform for Face recognition depicted through a GUI.This GUI depicts the face recognition system developed through feature extraction by Kekre Transform Algorithm. There are several functions that are...



Generation of signal with extra parameters

Detection using;
Fast Fourier Transform Algorithm
Goertzel Algorithm
Digital Filtering (FIR Filter bank)



I wrote this method to be, first and foremost, flexible. This method implements what is referred to as a Schwartzian transform algorithm. This method does provide a mechanism to ensure stability in the sort. This version does a sort in place.



Computes the autocovariance of two columns vectors consistently with the var and cov functions.
autocov computes the autocovariance between two column vectors X and Y with same length N using the Fast Fourier Transform algorithm from 0 to...



This program is open source code of fast Fourier transform in matlab.
Where y is the input argument and p is the normalized size of the input. Let
y = [1 2 3 4 ];
x= length(y);
m= log2(x);
p= ceil(m);
To call the...



computes the naturally-ordered discrete Hadamard transform



To get the best performance, you may have to adjust the parameters in the algorithm.



Delphi/C++ Builder VCL and FireMonkey (FMX) components library for advanced computer vision.
The components allow rapid development of fully featured advanced computer vision applications with zero lines of program code.

Also...



VisionLab is a set of .NET 2.0-4.5 components for advanced computer vision.
The components allow rapid development of fully featured advanced computer vision applications with zero lines of program code.

Also includes a Visual...



A function to automate bacterial colony counting in images of plated agar in a Petri dish.
Provides colony_count.m to automate counting of bacterial colonies.

The approach is as follows:

1. Use Hough transform to locate...



The function implement the 2D dyadic(Paley) ordered fast in-place Walsh-Hadamard transform, which can be used in signal processing, pattern recognition and Genetic alogorithms. This algorithm uses a Cooley-Tukey type signal flow graph and is...