Rank: 933 based on 120 downloads (last 30 days) and 3 files submitted
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Abbas Cheddad

E-mail
Company/University
Karolinska Institute

Personal Profile:

www.abbascheddad.net

Professional Interests:
Image Processing, Computer Vision, Steganography, Pattern Recognition, Optical Projection Tomography, etc

 

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Files Posted by Abbas View all
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(last 30 days)
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26 Jul 2012 Screenshot A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad cell segmentation, clustering, delaunay triangulatio..., face detection, graph cut, histogram 40 10
  • 5.0
5.0 | 2 ratings
06 Aug 2011 Screenshot A Fast Image Segmentation using Delaunay Triangulation A fully automated process that does not require initial estimate of number of clusters. Author: Abbas Cheddad image segmentation, delaunay triangulatio..., graph cut, clustering, histogram, vertices 57 15
  • 4.75
4.8 | 4 ratings
02 Sep 2009 Screenshot Tamper-proof digital files An example of a self-embedding scenario Author: Abbas Cheddad information hiding, watermarking, selfembedding, tamperproof, image processing, forensics 23 3
  • 5.0
5.0 | 1 rating
Comments and Ratings by Abbas View all
Updated File Comments Rating
03 Apr 2014 A Fast Image Segmentation using Delaunay Triangulation A fully automated process that does not require initial estimate of number of clusters. Author: Abbas Cheddad

Hi Vandita,

Can you PM me your email address so that I could send you the .m files?

10 Feb 2014 A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad

Dear Amani, Will it be possible to share with me the image which has generate such an error, I don't seem to have such problem with the program I have.

11 Apr 2013 A Fast Image Segmentation using Delaunay Triangulation A fully automated process that does not require initial estimate of number of clusters. Author: Abbas Cheddad

A tuned version is available from:

http://www.mathworks.com/matlabcentral/fileexchange/37556-a-fast-image-segmentation-using-delaunay-triangulation-revisited

14 Nov 2012 A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad

...calculates vertices of the Voronoi diagram [Delaunay Triangulation]'s outer graph (formally known as the convex hull)

14 Nov 2012 A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad

Hi Nik,

First of all thank you for your sweet comment. I am also using R2012a version and have no problem with the script.

What the program does is it calculates vertices of the Voronoi diagram's outer graph (formally known as the convex hull) and that is applied on the image histogram. The vertices are calculated twice:
Once from the histogram giving the vector P
and another time from the invert of the histogram yielding vector P3.
Sometimes P3 cannot be achieved due to co-linearity, so the program works on P instead of P3.

As for your problem, since you said P does have a value then I don't understand why you obtained "Undefined function or variable "P"."??

It would be helpful to show me the image you have been working on so that I can see exactly where the problem is -if any-.

Have a nice day!

Comments and Ratings on Abbas' Files View all
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10 Apr 2014 A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad Shirin

Hi Abbas,

I am more comfortable to use simple code then GUI based.

Can you please send me that version instead of the GUI one.

Thanks in advance for your help
:)

I have already sent you an email
Regards

03 Apr 2014 A Fast Image Segmentation using Delaunay Triangulation A fully automated process that does not require initial estimate of number of clusters. Author: Abbas Cheddad Cheddad, Abbas

Hi Vandita,

Can you PM me your email address so that I could send you the .m files?

03 Apr 2014 A Fast Image Segmentation using Delaunay Triangulation A fully automated process that does not require initial estimate of number of clusters. Author: Abbas Cheddad Vandita

Hi Abbas,
I am more comfortable to use simple code then GUI based. Can you please send me that version instead of the GUI one.
Hope you will respond soon as you have done in past.
Thanks in advance for your help:)

10 Feb 2014 A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad Cheddad, Abbas

Dear Amani, Will it be possible to share with me the image which has generate such an error, I don't seem to have such problem with the program I have.

11 Dec 2013 A Fast Image Segmentation using Delaunay Triangulation (Revisited) This is a tuned version of the old post on Delaunay-based image segmentation. Author: Abbas Cheddad Amani

I changed this
[ind2 ~]=find(x==x(j));
to
[ind2 ind_out]=find(x==x(j));
but still having this error

Undefined function or variable "P".

Error in DSNew (line 174)
P3=P;
what should I do ?

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