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I like matheamatica.


Jan
19
comment Efficient circular buffer?
@ Leonid Shifrin OK, thank you. I didn't see any tests with java libs calling from Mathematica. So, I can't say if it's slow or not...
Jan
19
comment Efficient circular buffer?
How about using linkedlist of java?
Jan
19
answered How do I export matrices into matlab format?
Jan
18
answered How to systematically classify Mathematica expressions?
Jan
4
awarded  Custodian
Jan
4
reviewed No Action Needed adding labels to points in ListPlot
Jan
4
reviewed No Action Needed Explain a Mathematica winning one-liner
Jan
3
revised Lorenz map for the Rössler system
formatting
Jan
3
suggested suggested edit on Lorenz map for the Rössler system
Dec
31
answered Mathematica Package for Bayesian Networks
Dec
31
comment Mathematica Package for Bayesian Networks
Isn't this duplicate of mathematica.stackexchange.com/questions/17138/…
Dec
31
accepted Image Processing: Finding Orientation and Position of Symmetry Axes
Dec
30
comment Image Processing: Finding Orientation and Position of Symmetry Axes
It can be done either center of gravity(mass) or by the profile of the image projection along the direction of the symmetry axis.
Dec
29
comment Image Processing: Finding Orientation and Position of Symmetry Axes
@Jens just corrected the link. Above is the over all process explained as in the paper.
Dec
29
comment Image Processing: Finding Orientation and Position of Symmetry Axes
The code above was just a small bit of the total process. 1. Perform a gradient operation on the image; 2. Obtain the gradient orientation histogram; 3. Search for the convolution peaks of the gradient orientation histogram by using the Fourier transform to obtain the orientations of symmetry axes; 4. Obtain sub-angular positional accuracy by fitting a parabola function, and finding the peak position analytically; 5. Perform symmetry check or evaluation about the obtained symmetry axes; 6. Obtain the position of this symmetry axis by using the center of mass of the object; and draw axes.
Dec
29
revised Image Processing: Finding Orientation and Position of Symmetry Axes
deleted 210 characters in body
Dec
29
comment Image Processing: Finding Orientation and Position of Symmetry Axes
In fact this question meant to be a toy example for image processing but turns out to be a drop in the ocean.
Dec
29
comment Image Processing: Finding Orientation and Position of Symmetry Axes
Great answer thank you for your efforts.
Dec
29
revised Image Processing: Finding Orientation and Position of Symmetry Axes
added 1476 characters in body
Dec
29
asked Image Processing: Finding Orientation and Position of Symmetry Axes