Rank: 422 based on 220 downloads (last 30 days) and 1 file submitted
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Yan Zhang

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Company/University
University of Central Lancashire

Personal Profile:

Awarded PhD degree in 2006 in the areas of computer vision and pattern recognition at the University of Central Lancashire. Since then, working as a postdoc at the same institute focusing on multi-dimensional and multi-modality medical data processing dedicated to image guided radiotherapy.

Professional Interests:
medical image processing, computer vision, variational/PDE models for data processing, pattern recognition and machine learning

 

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28 Jan 2013 Screenshot 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang 2d3d image segmentati..., levelset, aos, active contoursurface, snake, pde 220 59
  • 4.6087
4.6 | 23 ratings
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28 Apr 2010 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang

To Aureline,

Please type 'computer' in matlab and let me know what the result is. The precompiled version only works for 32bit windows system, yours may be 64bit.

23 Apr 2010 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang

Hi, Stefan

Thanks a lot for sharing your invaluable experience! I guess this might be the reason why the toolbox fails to work on 64-bit operating system as reported before. I promise to correct this bug once I have access on 64-bit machine.

30 Jan 2010 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang

To Yusuke,

The toolbox contains a AOS solver for the PDE in the form of u_t = div( g |\nabla u| ). This is a challenging problem because using explicit finite difference method (FDM) can cause unstability if the time step is too large.

For the PDE you mentioned, simple explicit FDM such as
u_(k+1) = u_k + delta_t * div(V)
should be working no matter how large delta_t is (of course the accuracy will be affected). The above scheme can be easily implemented in Matlab.

Hope this can help.

30 Jan 2010 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang

To Jenny,

The figure you mentioned was produced by a visualization software called Amira. As far as I know, the current matlab graphic toolbox doesn't support volume rendering.

22 Nov 2009 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang

Hi Alex,

The problem has been fully discussed before, please see the previous comments for the details. In brief, go to the source file ac_distance_transform_3d.cpp, and get rid of the string in std::exception.

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19 Jul 2014 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang Mr.Tee

i am using active contour without edge to detect built-up areas in satellite images.
how to measure its accuracy?

12 Jun 2014 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang Lopez, Luis

30 May 2014 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang Amat, Fernando

I am using R2012b with Windows 7 64-bit and MS Visual Studio 2010 and it works out of the box (both compiling the mex files and running the test code). Great job and extremely useful, especially since it also works for 3D data.

10 Apr 2014 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang Shirin

Hi Yan
Thanks very much for sharing.

I want to compile the code on Windows. However, it seems like the link given in "readme.txt"
"http://ecson.org/resources/active_contour_segmentation.html"
doesn't work any more.

Could you tell me how to access the version for WINDOWS?

Thanks in advance

01 Apr 2014 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang Darya

Hi Yan
Thanks a lot for sharing this useful toolbox. I am trying to use chan_vase_model for my MRI data which are 3D but since contour showing is possible only for 2D case. I was wondering how can I set the parameters and be sure that the correct area has been selected ? i.e is there anyway to see how the code is actually working in 3D case?

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