Rank: 1 based on 5053 downloads (last 30 days) and 67 files submitted
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Dirk-Jan Kroon

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Focal Machine Vision en Optical Systems

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Files Posted by Dirk-Jan View all
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(last 30 days)
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06 Jun 2013 Screenshot Kinect Matlab Microsoft Kinect, OpenNI wrapper, Skeleton, Depth Author: Dirk-Jan Kroon 2d, kinect, wrapper, nite, image processing, photo 251 105
  • 4.69231
4.7 | 26 ratings
12 Jul 2012 Matrix Inverse using LU factorization Example code LU decomposition with partial pivoting, also forward substitution, and Matrix inverse. Author: Dirk-Jan Kroon inverse, matrix inverse, lu decomposition, lu factorization, pivoting, lu 24 0
26 Jun 2012 Screenshot Polygon2Voxel Convert a triangulated mesh into a voxel volume Author: Dirk-Jan Kroon mesh, voxel volume, polygons, triangles, triangulated, voxels 38 12
  • 5.0
5.0 | 6 ratings
13 Jun 2012 Tiff Tag Reader A one file implementation of Tag-reader for complex Tiff files. Author: Dirk-Jan Kroon tiff, tif, tag, header, image file directory, ifd 17 0
14 May 2012 Screenshot Corresponding Points through MDL Minimum Description Length optimization of PCA model for 2D/3D ASM model building Author: Dirk-Jan Kroon mdl, minimum description l..., pca, principal, component, analysis 31 1
  • 4.0
4.0 | 1 rating
Comments and Ratings by Dirk-Jan View all
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11 Oct 2012 Web Server HTTP Matlab Web Server, allows m-files to be executed in a browser Author: Dirk-Jan Kroon

*Filipe S.
A Matlab GUI/Figure is user-interface thus client-side, this is a webserver thus server-side.
The only way to do client-side things like showing a GUI, is manually coding the GUI in javascript, html and css

31 May 2012 Biggest Connected Component This program is an example for image processing in order to obtain the biggest connected component Author: Gholamreza (Shahab) Anbarjafari

Can be done in 3 lines, without for loops with bwlabel, hist (or accumarray) and max

24 Apr 2012 Shape Context Based Corresponding Point Models Shape Context based nonrigid registration of 2D/3D objects, to build Active Shape Models Author: Dirk-Jan Kroon

*Birgit
Knnsearch is part of the "Statistics Toolbox" of Matlab. Maybe you can find a similar but free implementation on the File Exchange

19 Dec 2011 Polygon2Voxel Convert a triangulated mesh into a voxel volume Author: Dirk-Jan Kroon

*leo,
Only integer volume sizes are supported

24 Oct 2011 Kinect Microsoft SDK Video, Audio, Depth Stream and Skeleton tracking Author: Dirk-Jan Kroon

*Tim

The x,y coordinates are aligned with the depth image, which is twice as small as the video-stream. Thus this code : x=(Pos(1:20,5)-0.5)*2; transfers the coordinates from depth to photo image.
But this is only true if the depth image and photo image are aligned, and I don't know if that is always true.

Comments and Ratings on Dirk-Jan's Files View all
Updated File Comment by Comments Rating
19 Jun 2013 Web Server HTTP Matlab Web Server, allows m-files to be executed in a browser Author: Dirk-Jan Kroon Deoda, Suresh

Great work, thanks a lot.

17 Jun 2013 Classic AdaBoost Classifier Weak threshold classifier boosted to strong Classifier with Adaboost Author: Dirk-Jan Kroon chen, bodhitree

Hi Dirk-Jan Kroon,

In file ADABOOST_tr.m, there is a line as follow:

% The weight of the turn-th weak classifier
adaboost_model.weights(turn) =
log10((1-error_rate)/error_rate);

The weight should be changed to

adaboost_model.weights(turn) =
log((1-error_rate)/error_rate);

i.e. not base 10 logarithm but natural logarithm.

17 Jun 2013 Finite Iterative Closest Point Iterative Closest Point using finite difference optimization to register 3D point clouds affine. Author: Dirk-Jan Kroon Helia

12 Jun 2013 Texture Patch Show a 3D triangulated mesh ( patch ) with a texture Author: Dirk-Jan Kroon Vinayak

Hi, I cannot understand the following:

1) What is the "TF" variable and how do I create it if I have vertices (VV), trinagles (FF) and texture coordinates (VT)?

2) In your "testdata", I see that the number of texture coordinates in VT are not saem is the number of vertices. However, should that not be the same or am I missing something here?

Your guidance is highly appreciated.

Best,
Vinayak

06 Jun 2013 Dicom Toolbox Search/Read/Write dicom folders and dicom volumes Author: Dirk-Jan Kroon Antonio

Thanks, the dicom_write_volume function came in handy.

Top Tags Applied by Dirk-Jan
3d, 2d, image, patch, vertices
Files Tagged by Dirk-Jan View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
06 Jun 2013 Screenshot Kinect Matlab Microsoft Kinect, OpenNI wrapper, Skeleton, Depth Author: Dirk-Jan Kroon 2d, kinect, wrapper, nite, image processing, photo 251 105
  • 4.69231
4.7 | 26 ratings
12 Jul 2012 Matrix Inverse using LU factorization Example code LU decomposition with partial pivoting, also forward substitution, and Matrix inverse. Author: Dirk-Jan Kroon inverse, matrix inverse, lu decomposition, lu factorization, pivoting, lu 24 0
26 Jun 2012 Screenshot Polygon2Voxel Convert a triangulated mesh into a voxel volume Author: Dirk-Jan Kroon mesh, voxel volume, polygons, triangles, triangulated, voxels 38 12
  • 5.0
5.0 | 6 ratings
13 Jun 2012 Tiff Tag Reader A one file implementation of Tag-reader for complex Tiff files. Author: Dirk-Jan Kroon tiff, tif, tag, header, image file directory, ifd 17 0
14 May 2012 Screenshot Corresponding Points through MDL Minimum Description Length optimization of PCA model for 2D/3D ASM model building Author: Dirk-Jan Kroon mdl, minimum description l..., pca, principal, component, analysis 31 1
  • 4.0
4.0 | 1 rating

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