Rank: 133 based on 441 downloads (last 30 days) and 10 files submitted
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Jan Motl

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Files Posted by Jan View all
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14 Apr 2013 Screenshot Straighten image The function finds the document orientation. Author: Jan Motl image, horizon, tilted, automatic rotation, automatic alignment, level 50 0
01 Apr 2013 Screenshot Bradley local image thresholding A fast an well performing local image thresholding method. Author: Jan Motl binarization, local thresholding, image processing 59 0
01 Apr 2013 Screenshot Magic kernel resizing The “magic kernel” is a method of resampling images that gives clear results free of artifacts. Author: Jan Motl image processing, shrinking, enlarging, resizing, image, resampling 56 5
18 Mar 2013 Screenshot Bernsen local image thresholding Implementation of Bernsen's thresholding method. Author: Jan Motl image processing, local thresholding, binarization 39 0
18 Mar 2013 Screenshot Niblack local thresholding A traditional local image thresholding. Author: Jan Motl binarization, local thresholding, niblack, image, image processing 41 0
Comments and Ratings by Jan View all
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25 Apr 2013 Continuous Dynamic Time Warping A version of the DTW algorithm. The CDTW calculates the similarity between 2 vectors Author: Pau Micó

19 Apr 2013 Gray image thresholding using the Triangle Method Computes a threshold the Triangle method. Author: Bernard Panneton

It's giving different threshold than triangle method in ImageJ applied to the same image.
14 Apr 2013 Gray image thresholding using the Triangle Method Computes a threshold the Triangle method. Author: Bernard Panneton

30 Mar 2013 arrow.m Draw a line with an arrowhead. Author: Erik Johnson

11 Mar 2013 TIMEIT Benchmarking Function TIMEIT.M measures the time required to call a user-specified function Author: Steve Eddins

It would be great if the function returned also confidence interval.
Comments and Ratings on Jan's Files View all
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02 Apr 2013 Magic kernel resizing The “magic kernel” is a method of resampling images that gives clear results free of artifacts. Author: Jan Motl bmv

I mean : B=magickernel(magickernel(A),'DOWN');

02 Apr 2013 Magic kernel resizing The “magic kernel” is a method of resampling images that gives clear results free of artifacts. Author: Jan Motl bmv

After these transformations:
A;
B=magickernel(magickernel(A),'DAWN');
Should A and B be the same? (A=B ?)
28 Feb 2013 Average Filter Average filter performs image smoothing with integral image method. Author: Jan Motl Motl, Jan

Hi Jan,
thank you for your feedback. The biggest gain from the vectorised version is in calculation of the integral image - cumsum accelerated the whole function by 5%. And that is good.
28 Feb 2013 Nadaraya-Watson smoothing A non-parametrical regression (smoothing) tool using Gaussian kernel. Author: Jan Motl Motl, Jan

Hi Mo,
I just uploaded a partially vectorised version, which should be a bit faster. Now the smoothing takes around 10 seconds to process 2500 samples on my computer. Let me know if you need it to be even faster.

25 Feb 2013 Magic kernel resizing The “magic kernel” is a method of resampling images that gives clear results free of artifacts. Author: Jan Motl Semechko, Anton

The cambridgeincolour link is pretty awesome. Thanks!
Top Tags Applied by Jan
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image processing, image, binarization, local thresholding, smoothing
Files Tagged by Jan View all
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Updated   File Tags Downloads
(last 30 days) 		Comments Rating
14 Apr 2013 Screenshot Straighten image The function finds the document orientation. Author: Jan Motl image, horizon, tilted, automatic rotation, automatic alignment, level 50 0
01 Apr 2013 Screenshot Bradley local image thresholding A fast an well performing local image thresholding method. Author: Jan Motl binarization, local thresholding, image processing 59 0
01 Apr 2013 Screenshot Magic kernel resizing The “magic kernel” is a method of resampling images that gives clear results free of artifacts. Author: Jan Motl image processing, shrinking, enlarging, resizing, image, resampling 56 5
18 Mar 2013 Screenshot Bernsen local image thresholding Implementation of Bernsen's thresholding method. Author: Jan Motl image processing, local thresholding, binarization 39 0
18 Mar 2013 Screenshot Niblack local thresholding A traditional local image thresholding. Author: Jan Motl binarization, local thresholding, niblack, image, image processing 41 0

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