Rank: 1036 based on 137 downloads (last 30 days) and 1 file submitted
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Artiom Kovnatsky

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USI Università della Svizzera italiana

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Professional Interests:
applied mathematics

 

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10 Jan 2014 Screenshot Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky harris, fps, fp, korners, feature points, image processing 137 7
  • 4.5
4.5 | 4 ratings
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30 May 2014 Surface Spherical Harmonic Functions Visualization Visualization of surface spherical harmonics on the sphere surface. Author: Dimitrios Piretzidis

10 Jan 2014 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky

Hi,
The problem with d2Fdxdy has been fixed, now d2Fdxdy = [ 1 0 -1; 0 0 0; -1 0 1 ]/4

Artiom

02 Dec 2010 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky

Hi,
yes, u right, need to be what u've written.
I'll change it.
Thank you.
:)

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01 Jul 2014 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky Joyce

Hi,
why HrLOrntPoints and HrLPoints have different rows? Should HrLOrntPoints has same number with HrLPoints only one column added?

10 Jan 2014 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky Kovnatsky, Artiom

Hi,
The problem with d2Fdxdy has been fixed, now d2Fdxdy = [ 1 0 -1; 0 0 0; -1 0 1 ]/4

Artiom

14 Oct 2013 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky Biswas, Indraneel

thank you for the great code.
however, there is a small bug in Findlclmxm.m
derivative mask d2Fdxdy = [ 1 0 -1; 0 0 0; -1 0 -1 ]/4 is not correct.

28 Feb 2013 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky Ferad

Very useful! There is some obsolete functions such as isrgb. A solution was to directly remove then an follow the code path for True.

07 Mar 2012 Feature points in image, Keypoint extraction Finds, matches, plots feature points in images. Author: Artiom Kovnatsky fastidious

hi!!!
I found your code very interesting, but it gave the following error...
??? Error using ==> minus
Matrix dimensions must agree.

Error in ==> Findlclmxm at 83
rowSPA = row - RowDeltaY( ind2 );

Error in ==> harrislpls at 80
[ row, clmn, rowSPA, clmnSPA, MxMtr ] = Findlclmxm(HrF, NBHOOD,
BorderDistance, ThreshType, HarrisThresh );

Error in ==> demoSIFT at 59
[ HrLPoints1 ] = harrislpls( img1gr, TypeOfNBHOOD, NBHOOD,
TypeOfCornerDetector, BorderDistance, ThreshType, HarrisThresh, k, Dilate,
radius, sigma_nmbr, dispPlaces, SwitchWaitbars );

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