Rank: 248 based on 241 downloads (last 30 days) and 8 files submitted
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Tolga Birdal

E-mail
Company/University
Gravi Information Technologies and Consultancy Ltd

Personal Profile:

Check out my company Gravi: www.gravi.com.tr/en

Check out my personal website: www.tbirdal.me

Professional Interests:
2D/3D Computer Vision, Machine Vision, Image Processing, Pattern Recognition

 

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Files Posted by Tolga View all
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(last 30 days) 		Comments Rating
15 Aug 2011 Screenshot Maximum Inscribed Circle using Voronoi Diagram A fast, subpixel accurate largest inner circle detection using Voronoi Diagrams Author: Tolga Birdal largest inner circle, maximum empty circle, maximum inscribed cir..., binary image processi..., voronoi diagram, inpolygon 16 0
31 Jul 2011 Screenshot Sharpness Estimation From Image Gradients The simplest form of estimating the sharpness feature from a grayscale image Author: Tolga Birdal sharpen, sharpness, unsharp, sharpness estimation, mean filtering, image processing 21 0
28 Jul 2011 Screenshot Quick Structured Mesh Generator Fast generation of structured meshes given the vertices (MEX!). Interpolation/resizing of the mesh. Author: Tolga Birdal structured mesh, depth map, point cloud, kinect, tof, refine 35 0
  • 5.0
5.0 | 1 rating
20 Jul 2011 Screenshot Smoothing 2D Contours Using Local Regression Lines This submission contains both the implementation and the test function for 2D contour smoothing. Author: Tolga Birdal smoothing, contour processing, chain codes, boundary, fitting, regression 34 0
  • 5.0
5.0 | 3 ratings
22 Mar 2011 Screenshot Fast Inpolygon in MEX Fast inpolygon function implemented in MEX. So far one of the fastest. Author: Tolga Birdal inpolygon, inpoly, points in polygon, fastest inpolygon, mex, image processing 6 3
  • 4.0
4.0 | 1 rating
Comments and Ratings by Tolga View all
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18 Jan 2012 Object Matching An object matching method based on Lowe, D.G. Object recognition from local scale-invariant features Author: Li yang Ku

Good work. Could you share the matching algorithm you used in this example? Is it published?

Thanks,
27 Oct 2011 Fast edges of a color image (actual color, not converting to grayscale) Edges of a color image by the max gradient method. Author: Joao Henriques

Hey Joao ,

Well, you are right at some point but in Sobel-like edges you are considering only 3x3 neighborhoods, while more advanced derivatives such as Simoncelli or 5 point stencil use a larger neighborhood and they are proved to be more robust against noise.

Actually my questions was whether you evaluated any other derivatives or not. Thanks for the response. I would appreciate if you could try others and give a feedback. I happened to realize that the algorithm only works with Sobel-like derivatives.

/tolga
07 Oct 2011 Introduction à Matlab (deuxième édition) tous les m-fichiers relatifs à la deuxième édition de l'Introduction à Matlab Author: Jean-Thierry
07 Oct 2011 Convolución Vectorial - Vectorial Convolution Calculation of the convolution between a pair of vectors. Author: Fernando Velez Varela

How nationalist are you? : )
08 Aug 2011 Maximum Inscribed Circle using Distance Transform Approximately computes the largest inner circle of a contour/region using distance transform Author: Tolga Birdal

If your circle points are correct, finding the polygon seems ok. Then you can do sth like

ind= sub2ind(size(I) , Y(Cin), X(Cin));
Mask=zeros(size(I));
Mask(ind)=1;

I have no idea about the createMask function.
Comments and Ratings on Tolga's Files View all
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28 Nov 2011 Maximum Inscribed Circle using Distance Transform Approximately computes the largest inner circle of a contour/region using distance transform Author: Tolga Birdal W, Sebastian
10 Oct 2011 Fast Inpolygon in MEX Fast inpolygon function implemented in MEX. So far one of the fastest. Author: Tolga Birdal Kamer, Yaver

So now that you know that this code is not the fastest would you kindly consider editing your bold claims just for the sake of not being misleading?
09 Oct 2011 Quick Structured Mesh Generator Fast generation of structured meshes given the vertices (MEX!). Interpolation/resizing of the mesh. Author: Tolga Birdal Yunfei, Li
11 Sep 2011 Simple Face Detection Implementation of A SIMPLE AND ACCURATE COLOR FACE DETECTION ALGORITHM IN COMPLEX BACKGROUND Author: Tolga Birdal Nguyen Quang, Huy

Thanks for sharing.
09 Aug 2011 Maximum Inscribed Circle using Distance Transform Approximately computes the largest inner circle of a contour/region using distance transform Author: Tolga Birdal unduo, osunmbs

ok, tnks,i'll try dis out
Top Tags Applied by Tolga
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image processing, computer vision, inpolygon, binary image processing, largest inner circle
Files Tagged by Tolga View all
  • 1 - 5 of
  • 8
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
15 Aug 2011 Screenshot Maximum Inscribed Circle using Voronoi Diagram A fast, subpixel accurate largest inner circle detection using Voronoi Diagrams Author: Tolga Birdal largest inner circle, maximum empty circle, maximum inscribed cir..., binary image processi..., voronoi diagram, inpolygon 16 0
31 Jul 2011 Screenshot Sharpness Estimation From Image Gradients The simplest form of estimating the sharpness feature from a grayscale image Author: Tolga Birdal sharpen, sharpness, unsharp, sharpness estimation, mean filtering, image processing 21 0
28 Jul 2011 Screenshot Quick Structured Mesh Generator Fast generation of structured meshes given the vertices (MEX!). Interpolation/resizing of the mesh. Author: Tolga Birdal structured mesh, depth map, point cloud, kinect, tof, refine 35 0
  • 5.0
5.0 | 1 rating
20 Jul 2011 Screenshot Smoothing 2D Contours Using Local Regression Lines This submission contains both the implementation and the test function for 2D contour smoothing. Author: Tolga Birdal smoothing, contour processing, chain codes, boundary, fitting, regression 34 0
  • 5.0
5.0 | 3 ratings
22 Mar 2011 Screenshot Fast Inpolygon in MEX Fast inpolygon function implemented in MEX. So far one of the fastest. Author: Tolga Birdal inpolygon, inpoly, points in polygon, fastest inpolygon, mex, image processing 6 3
  • 4.0
4.0 | 1 rating

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