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Anton Semechko


University of Toronto

58 total contributions since 2010

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

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Compute exact rigid-body parameters of objects represented by triangular surface meshes
Compute exact rigid body parameters of closed triangular surface meshes using divergence theorem

1 year ago | 1 downloads |

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Submitted


Suite of functions to perform uniform sampling of a sphere
Set of functions to perform approximately uniform sampling/decomposition of the spherical domain

1 year ago | 36 downloads |

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Submitted


Exact minimum bounding spheres/circles
Compute exact or approximate minimum bounding spheres/circles

2 years ago | 24 downloads |

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Question


Setting 'FaceAlpha'<1 for a patch object causes x- and y- axes of the plot to dissapear. Why and how can this be corrected?
Hello everyone, have any of you ever plotted a 2D patch object and noticed that upon altering its 'FaceAlpha' value below 1, ...

2 years ago | 1 Answers | 0

1

answer

Submitted


Fast segmentation of N-dimensional grayscale images
Partition N-D grayscale image into c classes using efficient C-means and fuzzy C-means clustering

3 years ago | 50 downloads |

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Responded


Re: No help from "beep off"
In case you are running MatLab on Vista, this is how you can disable the annoying beep coming from the system speakers: http:/...

4 years ago | 33166 views

Answered
Dividing a triangle into equal parts
Suppose you have a triangle defined by the vertices A, B and C. To subdivide this triangle into n triangles of equal area you ca...

4 years ago | 0

Answered
Point inside triangle(s)?
Hi Sven, I have encountered this problem many times in the past. I am aware of at least two approaches to solve it. The first...

4 years ago | 1

Solved


Is my wife right?
Regardless of input, output the string 'yes'.

4 years ago

Solved


Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...

4 years ago

Solved


Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

4 years ago

Solved


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

4 years ago

Solved


Eliminate unnecessary polygon vertices
Suppose you have an n-point polygon represented as an n-by-2 matrix of polygon vertices, P. Assume that the polygon is closed; t...

4 years ago

Answered
Problem trying to access labeled portion of images (updated 7/5)
The error occurs for m=559. If you look at the object: figure, imshow(K==559) set(gca,'xlim',[481 580],'ylim',[500 6...

4 years ago | 0

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Answered
fminbnd fails to converge with exitflag=1
because TolX is a measure of change in x between two successive iterations and not an indication of how close it is to a true mi...

4 years ago | 0

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Answered
Skull striping without affecting tumor region
The simplest way to segment the tumor in the sample image would be to use region growing algorithm. There are a few implementati...

4 years ago | 0

Answered
Solving an implicit function, fsolve vs. fzero
You can try the following approach: abc=rand(3,1); % A, B, C parameters q=8; % order of the polynomial ...

4 years ago | 1

Answered
does anybody have a matlab code for revised simplex method with box vriables like -2<=x<=10....etc
yep, there is a submission of this sort on FEX: http://www.mathworks.com/matlabcentral/fileexchange/8277-fminsearchbnd-fminse...

4 years ago | 0

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Answered
weird results with relational operation ==
The expression xchk == X3 is indeed false, however , if you check the value of abs(xchk-X3) you will find it to be le...

4 years ago | 1

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Answered
The "imregconfig" and " imregister" functions . help
You will not find these functions with your version of MATLAB because they were made available quite recently with the R2012a ve...

4 years ago | 0

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Answered
triangles generated by isosurface
Hi Sayed, unfortunately there are no built-in Matlab functions that would allow you to regularize your mesh. There is, however,...

4 years ago | 0

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Answered
Get line properties from it's handle
try this: x=get(lineHandle,'XData'); y=get(lineHandle,'YData'); x and y variables respectively should be the x and y ...

4 years ago | 1

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Answered
Identify decaying or growing sinusoidal graph
find the peaks, order them according to time and compare their magnitudes. see: http://www.mathworks.com/matlabcentral/fileex...

4 years ago | 0

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Answered
why fmincon optimizer does not optimize my last variable ?
it seems that your cost function is independent of that last variable

4 years ago | 0

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Answered
How to smooth an edge. I need you help very urgent
If you have IPT see the documentation for 'bwmorph' function. Amongst other things it allows you to remove spurious details of t...

4 years ago | 0

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Answered
Radon Transform
see page 12 of this document: http://eecourses.technion.ac.il/049029/presentations/RadonTransform%20-%20slides.pdf

4 years ago | 1

Answered
Minimizing mean square error for a body tracking problem
No pen and paper necessary. Here is code for the function that I already have: function [R,t,s]=SymTformParams(Xref,Xsrc) ...

4 years ago | 0

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Answered
Minimizing mean square error for a body tracking problem
If point correspondences are known, do the following: 1) solve for translation, by comparing the centroids of the landmark se...

4 years ago | 0

Answered
Clean-up isosurface output
http://www.mathworks.com/matlabcentral/fileexchange/27667-splitfv-split-a-mesh

5 years ago | 0

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Answered
Shape analysis to distinguish different objects?
see this paper: Mingqiang et al. (2008) "A Survey of Shape Feature Extraction Techniques"

5 years ago | 0

| accepted

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