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function [y0detect,x0detect,Accumulator] = houghcircle(Imbinary,r,thresh)
%HOUGHCIRCLE - detects circles with specific radius in a binary image.
%
%Comments:
% Function uses Standard Hough Transform to detect circles in a binary image.
% According to the Hough Transform for circles, each pixel in image space
% corresponds to a circle in Hough space and vise versa.
% upper left corner of image is the origin of coordinate system.
%
%Usage: [y0detect,x0detect,Accumulator] = houghcircle(Imbinary,r,thresh)
%
%Arguments:
% Imbinary - a binary image. image pixels that have value equal to 1 are
% interested pixels for HOUGHLINE function.
% r - radius of circles.
% thresh - a threshold value that determines the minimum number of
% pixels that belong to a circle in image space. threshold must be
% bigger than or equal to 4(default).
%
%Returns:
% y0detect - row coordinates of detected circles.
% x0detect - column coordinates of detected circles.
% Accumulator - the accumulator array in Hough space.
%
%Written by :
% Amin Sarafraz
% Photogrammetry & Computer Vision Devision
% Geomatics Department,Faculty of Engineering
% University of Tehran,Iran
% sarafraz@geomatics.ut.ac.ir
%HOUGHCIRCLE - detects circles with specific radius in a binary image.
%
%Comments:
% Function uses Standard Hough Transform to detect circles in a binary image.
% According to the Hough Transform for circles, each pixel in image space
% corresponds to a circle in Hough space and vise versa.
% upper left corner of image is the origin of coordinate system.
%
%Usage: [y0detect,x0detect,Accumulator] = houghcircle(Imbinary,r,thresh)
%
%Arguments:
% Imbinary - a binary image. image pixels that have value equal to 1 are
% interested pixels for HOUGHLINE function.
% r - radius of circles.
% thresh - a threshold value that determines the minimum number of
% pixels that belong to a circle in image space. threshold must be
% bigger than or equal to 4(default).
%
%Returns:
% y0detect - row coordinates of detected circles.
% x0detect - column coordinates of detected circles.
% Accumulator - the accumulator array in Hough space.
%
%Written by :
% Amin Sarafraz
% Photogrammetry & Computer Vision Devision
% Geomatics Department,Faculty of Engineering
% University of Tehran,Iran
% sarafraz@geomatics.ut.ac.ir
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