Rank: 96 based on 434 downloads (last 30 days) and 2 files submitted
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Tao Peng

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University of Maryland

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17 Nov 2010 Screenshot Detect circles with various radii in grayscale image via Hough Transform Detect circular shapes in a grayscale image. Resolve their center positions and radii. Author: Tao Peng circle detection, circular hough transf..., image analysis, radius, gradient, potw 313 43
  • 4.75758
4.8 | 33 ratings
06 Dec 2005 Screenshot Detect lines in grayscale image using Hough Transform Detection of lines (line segments) in a grayscale image using gradient-based Hough Transform. Author: Tao Peng image analysis, line detection hough ... 121 11
  • 3.90909
3.9 | 11 ratings
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17 Dec 2011 Detect lines in grayscale image using Hough Transform Detection of lines (line segments) in a grayscale image using gradient-based Hough Transform. Author: Tao Peng majid

this m code works so well.
but is there any paper ,journal or web page that describe this algorithm?
thanks

14 Dec 2011 Detect circles with various radii in grayscale image via Hough Transform Detect circular shapes in a grayscale image. Resolve their center positions and radii. Author: Tao Peng patil, ketan

I didn't understand following part in code
.
rr_4linaccum = double( prm_r_range ); %prm_r_range contain all the sort values of radius in ascending order
linaccum_dr = [ (-rr_4linaccum(2) + 0.5) : -rr_4linaccum(1) , ...
    (rr_4linaccum(1) + 0.5) : rr_4linaccum(2) ];

lin2accum_aJ = floor( ...
double(grdx(grdmasklin)./grdmag(grdmasklin)) * linaccum_dr + ...
repmat( double(grdmask_IdxJ)+0.5 , [1,length(linaccum_dr)] ) ...
);
lin2accum_aI = floor( ...
double(grdy(grdmasklin)./grdmag(grdmasklin)) * linaccum_dr + ...
repmat( double(grdmask_IdxI)+0.5 , [1,length(linaccum_dr)] ) ...
);
plese tell me
12 Dec 2011 Detect lines in grayscale image using Hough Transform Detection of lines (line segments) in a grayscale image using gradient-based Hough Transform. Author: Tao Peng andersen, ole

:)
19 Nov 2011 Detect circles with various radii in grayscale image via Hough Transform Detect circular shapes in a grayscale image. Resolve their center positions and radii. Author: Tao Peng Rechtacek, Vilém

Hello,

function CircularHough_Grd works very well for images, but I need to process video stream (for example from web camera). I want to detect eyes in video stream. I want to use CircularHough Tansform for detection of iris, becouse iris have circular shape. I assume, that the face fills the entire scanned image space, so I do not need to detect face.

Can anyone help me? When you send me the complete code, it would be best for me.

Thank you.
Vilem Rechtacek
17 Nov 2011 Detect circles with various radii in grayscale image via Hough Transform Detect circular shapes in a grayscale image. Resolve their center positions and radii. Author: Tao Peng Vince

I'm fairly new to image processing, but I can follow your code halfway decent.

However, I am capturing an image from a webcam, and cant seem to get the function to work. What format should the image be in? I've tried to save it as several formats, but either get a lime green image as the result, or an error saying the image must be 2-dimensional. Any suggestions?

Top Tags Applied by Tao
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image analysis, circular hough transform, gradient, line detection hough transform segment gradient grayscale, radius
Files Tagged by Tao View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
17 Nov 2010 Screenshot Detect circles with various radii in grayscale image via Hough Transform Detect circular shapes in a grayscale image. Resolve their center positions and radii. Author: Tao Peng circle detection, circular hough transf..., image analysis, radius, gradient, potw 313 43
  • 4.75758
4.8 | 33 ratings
06 Dec 2005 Screenshot Detect lines in grayscale image using Hough Transform Detection of lines (line segments) in a grayscale image using gradient-based Hough Transform. Author: Tao Peng image analysis, line detection hough ... 121 11
  • 3.90909
3.9 | 11 ratings

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