Rank: 284 based on 229 downloads (last 30 days) and 6 files submitted
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Anton Semechko

E-mail
Company/University
University of Toronto
Lat/Long
43.6615, -79.395

Personal Profile:

PhD student

Professional Interests:
Signal/medical image processing, computational anatomy and biomechanics

 

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Files Posted by Anton View all
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30 May 2013 Screenshot Fast segmentation of N-dimensional grayscale images Partition N-D grayscale image into c classes using efficient C-means and fuzzy C-means clustering Author: Anton Semechko image segmentation, fuzzy cmeans, cmeans, kmeans, clustering 103 0
23 May 2013 Screenshot Uniform Sampling of a Sphere Create an approximately uniform triangular tessellation of a unit sphere Author: Anton Semechko thomson problem, particle system, uniform sampling of a..., subdivision, triangular quadrisect..., optimization 52 3
  • 5.0
5.0 | 1 rating
04 Oct 2012 Screenshot Belousov-Zhabotinsky reaction on 2-manifold Design a texture for a triangular surface mesh by simulating a Belousov-Zhabotinsky reaction Author: Anton Semechko reactiondiffusion, texture, belousovzhabotinsky r..., nonlinear system, emergent behaviour, simulation 5 0
29 Jan 2012 Screenshot Nonlinear Relaxation Labeling for Image Processing Improve spatial coherence of a 2D monochromatic/multispectral image using probabilistic relaxation Author: Anton Semechko nonlinear relaxation ..., relaxation labeling, relaxation labelling, probabilistic relaxat..., image segmentation, image regularization 25 3
  • 5.0
5.0 | 1 rating
23 Jan 2012 Screenshot Decimate Polygon Simplify a 2D closed, piecewise linear contour by specifying boundary offset tolerance. Author: Anton Semechko polygon simplificatio..., polygon decimation, image processing, simplify polygon 15 8
  • 5.0
5.0 | 2 ratings
Comments and Ratings by Anton View all
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14 Jun 2013 Marching Cubes Use vectorized marching cubes algorithm to compute triangulated mesh of an isosurface from 3D matrix Author: Peter Hammer

I think it may be helpful, for some people who are concerned about the efficiency of the code, if you added to your description the actual size of the CT dataset that was used to test the function. In other words, how big was the CT image of the bunny?

Also did you have a chance to benchmark this code against the built-in 'isosurface' function?
07 Jun 2013 hilbert3(n) function [x,y,z] = hilbert3(n) computes 3D coordinates of points in n-th order Hilbert curve. Author: Ivan Martynov

So simple yet so beautiful. Perfect of example of the power of recursion.

23 May 2013 Uniform Sampling of a Sphere Create an approximately uniform triangular tessellation of a unit sphere Author: Anton Semechko

@ Alec, thank you for pointing that out. I just resubmitted an updated version of RandSampleSphere function that does indeed produce stratified sampling of the unit sphere. It should appear shortly.
12 May 2013 2D/3D image segmentation toolbox 2D/3D image segmentation using level-set based active contour/surface with AOS scheme Author: Yan Zhang

Incredible work! Thank you very much for making this available!
25 Apr 2013 Short Time Fourier Transform Script for computing the short time Fourier transform of 1D signals. Author: Hafeez Dhalla

This is a pretty sloppy implementation of short-time FT. There are no default settings provided and the function throws an error if you specify a column vector instead of a row vector as a your input signal.
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06 Jun 2013 Nonlinear Relaxation Labeling for Image Processing Improve spatial coherence of a 2D monochromatic/multispectral image using probabilistic relaxation Author: Anton Semechko anwar

my matlab was version 2011. However, your code only got problem operator things like '.-' for subtract operator is wrong in matlab 2011, just delete '.' only, then it is good to go.

That's all, keep a good job!
23 May 2013 Uniform Sampling of a Sphere Create an approximately uniform triangular tessellation of a unit sphere Author: Anton Semechko Semechko, Anton

@ Alec, thank you for pointing that out. I just resubmitted an updated version of RandSampleSphere function that does indeed produce stratified sampling of the unit sphere. It should appear shortly.
20 May 2013 Uniform Sampling of a Sphere Create an approximately uniform triangular tessellation of a unit sphere Author: Anton Semechko Alec

Thanks for sharing your code.

One note. The "stratified" option in RandSampleSphere is not really stratified. In fact it is the same as the "uniform" option: a uniform sampling following "Spherical Sampling by Archimedes’ Theorem" [Shao & Badler 96]
28 Jan 2013 Decimate Polygon Simplify a 2D closed, piecewise linear contour by specifying boundary offset tolerance. Author: Anton Semechko Karlsson, Mattias

Great function. It's nice that it is self contained too.
29 Sep 2012 Nonlinear Relaxation Labeling for Image Processing Improve spatial coherence of a 2D monochromatic/multispectral image using probabilistic relaxation Author: Anton Semechko Semechko, Anton

A possible cause of your error is that you are using an older version Matlab, which does not recognize the meaning of the '~' placeholder.
Top Tags Applied by Anton
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image processing, image segmentation, uniform sampling of a sphere, belousovzhabotinsky reaction, clustering
Files Tagged by Anton View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
30 May 2013 Screenshot Fast segmentation of N-dimensional grayscale images Partition N-D grayscale image into c classes using efficient C-means and fuzzy C-means clustering Author: Anton Semechko image segmentation, fuzzy cmeans, cmeans, kmeans, clustering 103 0
23 May 2013 Screenshot Uniform Sampling of a Sphere Create an approximately uniform triangular tessellation of a unit sphere Author: Anton Semechko thomson problem, particle system, uniform sampling of a..., subdivision, triangular quadrisect..., optimization 52 3
  • 5.0
5.0 | 1 rating
04 Oct 2012 Screenshot Belousov-Zhabotinsky reaction on 2-manifold Design a texture for a triangular surface mesh by simulating a Belousov-Zhabotinsky reaction Author: Anton Semechko reactiondiffusion, texture, belousovzhabotinsky r..., nonlinear system, emergent behaviour, simulation 5 0
29 Jan 2012 Screenshot Nonlinear Relaxation Labeling for Image Processing Improve spatial coherence of a 2D monochromatic/multispectral image using probabilistic relaxation Author: Anton Semechko nonlinear relaxation ..., relaxation labeling, relaxation labelling, probabilistic relaxat..., image segmentation, image regularization 25 3
  • 5.0
5.0 | 1 rating
23 Jan 2012 Screenshot Decimate Polygon Simplify a 2D closed, piecewise linear contour by specifying boundary offset tolerance. Author: Anton Semechko polygon simplificatio..., polygon decimation, image processing, simplify polygon 15 8
  • 5.0
5.0 | 2 ratings

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