Rank: 785 based on 116 downloads (last 30 days) and 10 files submitted
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Gabriele Lombardi

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Università degli Studi di Milano

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Files Posted by Gabriele View all
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31 Jan 2013 Intrinsic dimensionality estimation techniques Implementation of some state-of-art intrinsic dimensionality estimators. Author: Gabriele Lombardi statistics, intrinsic dimensional..., estimation 12 0
28 Aug 2008 Published MATLAB Files GeoML A general morphable template tool for image segmentation. Author: Gabriele Lombardi morphable templates, active templates, geometric model, geometry, image analysis 7 2
01 Apr 2007 Published MATLAB Files FHook A took to simply use hooking techniques and AOP. Author: Gabriele Lombardi development environme..., callback, hooking, hook technique, utilities, development 0 0
20 Sep 2006 Published MATLAB Files MiLi Interpreter of a variation of the LISP language Author: Gabriele Lombardi lisp schema interpret... 0 0
13 Sep 2006 Published MATLAB Files Moving Least Squares Tools that implements the Moving Least Squares algorithm to deform points and images Author: Gabriele Lombardi deformation, image deformation, transforms, thinplate, realtime image deform... 29 5
  • 3.66667
3.7 | 3 ratings
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30 Apr 2012 Moving Least Squares Tools that implements the Moving Least Squares algorithm to deform points and images Author: Gabriele Lombardi Xiao, Joe

I am having trouble with the above mentioned problem. Can some one please provide some help on how to solve it? Especially the problem with inverting the computed forward lookup-coordinates?

Thanks!
10 Jan 2012 Parzen PNN A Parzen Probabilistic Neural Network classifier Author: Gabriele Lombardi Prasad, Krishna

Nice, good classifier!!!
16 Jun 2011 Moving Least Squares Tools that implements the Moving Least Squares algorithm to deform points and images Author: Gabriele Lombardi Przem

This implementation is wrong. The inverse-mapping computed in the function MLSD2DWarp is the wrong solution to the problem of backward image interpolation.

The paper of [Schaefer etal. 2006] provides the math for the forward-mapping and it cannot be inverted trivially. One possible solution is to swap the point-sets (p and q) and lose the benefits of the pre-computations, but one can use the fast backward-image-warping for interpolation.

One other solution is to compute the fast forward-mapping as in [Schaefer etal. 2006] and use the slow function "griddata" (or the slightly faster "TriScatteredInterp") instead of "interp2" in order to interpolate the image. In any case, it is not that fast...

Inverting the computed forward lookup-coordinates as done in this code is in any case wrong. You can observe this, if you pull on the handles: one cannot reconstruct the results of the papers. The handles one pulls are not followed by the interpolated image...
10 Mar 2011 Moving Least Squares Tools that implements the Moving Least Squares algorithm to deform points and images Author: Gabriele Lombardi Alec

This appears to be broken in version 2010b. MLSDeform crashes when you try to drag the points...

Okay, now I have fixed the dragging bug, but the deformations look totally wrong. The deformed image does not interpolate the control points. Is it possible that version changes in Matlab have botched this script?
10 Mar 2011 Moving Least Squares Tools that implements the Moving Least Squares algorithm to deform points and images Author: Gabriele Lombardi Alec

This appears to be broken in version 2010b. MLSDeform crashes when you try to drag the points...
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development environment, statistics, utilities, active templates, art
Files Tagged by Gabriele View all
  • 1 - 5 of
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
31 Jan 2013 Intrinsic dimensionality estimation techniques Implementation of some state-of-art intrinsic dimensionality estimators. Author: Gabriele Lombardi statistics, intrinsic dimensional..., estimation 12 0
28 Aug 2008 Published MATLAB Files GeoML A general morphable template tool for image segmentation. Author: Gabriele Lombardi morphable templates, active templates, geometric model, geometry, image analysis 7 2
01 Apr 2007 Published MATLAB Files FHook A took to simply use hooking techniques and AOP. Author: Gabriele Lombardi development environme..., callback, hooking, hook technique, utilities, development 0 0
20 Sep 2006 Published MATLAB Files MiLi Interpreter of a variation of the LISP language Author: Gabriele Lombardi lisp schema interpret... 0 0
13 Sep 2006 Published MATLAB Files Moving Least Squares Tools that implements the Moving Least Squares algorithm to deform points and images Author: Gabriele Lombardi deformation, image deformation, transforms, thinplate, realtime image deform... 29 5
  • 3.66667
3.7 | 3 ratings

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