Rank: 2880 based on 36 downloads (last 30 days) and 2 files submitted
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Robert Jacobsen

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28 Apr 2014 Gaussian-log-Gaussian modelling of wavelets Code related to paper on wavelet modelling. Author: Robert Jacobsen wavelets, em algorithm 15 0
06 Mar 2012 Hidden Markov modelling of contourlet transforms for art authentication Fits hidden Markov models to contourlet transform and use these for classification of images Author: Robert Jacobsen hmt, em algorithm, classification, lasso 21 2
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14 Oct 2013 Hidden Markov modelling of contourlet transforms for art authentication Fits hidden Markov models to contourlet transform and use these for classification of images Author: Robert Jacobsen

Hi Kadi

I'm sorry about your long standing question! (I almost never check this page.)

If it's still of interest tp, bp, lp and rp are short for top/bottom/left/right percentage. They are used to specify the control points in the keystone transform as specified in e.g. "Computer Graphics Using OpenGL" by Francis Hill.

I don't understand what you mean by shifting the image in each direction...

Let me know if you are still interested and I'll try to make an example.

19 Nov 2012 barrel and pincushion lens distortion correction I = LENSDISTORT(I, k)corrects for radially symmetric distortions Author: Jaap de Vries

Very nice code!

It appears that your border correction is intended for the default ftype only.

Regarding Eyal's comment, I think he means that this way of manipulating images is usually thought of as simulating distortion, not removing it.

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14 Oct 2013 Hidden Markov modelling of contourlet transforms for art authentication Fits hidden Markov models to contourlet transform and use these for classification of images Author: Robert Jacobsen Jacobsen, Robert

Hi Kadi

I'm sorry about your long standing question! (I almost never check this page.)

If it's still of interest tp, bp, lp and rp are short for top/bottom/left/right percentage. They are used to specify the control points in the keystone transform as specified in e.g. "Computer Graphics Using OpenGL" by Francis Hill.

I don't understand what you mean by shifting the image in each direction...

Let me know if you are still interested and I'll try to make an example.

04 Feb 2013 Hidden Markov modelling of contourlet transforms for art authentication Fits hidden Markov models to contourlet transform and use these for classification of images Author: Robert Jacobsen Kadi

I have an image taken with a camera that was mounted at an angle hence produced a keystone effect on the image. I am trying to transform the image so that the keystone effect is removed. I downloaded your code and was playing around with it. I am having trouble understanding the significance of the variables tp,bp,lp and rp. You mentioned that they represent blank spaces along the top, bottom, left and right sides respectively. Do they represent the number of pixels by which I want image to be shifted in each direction? Could you please explain a little more in detail. An example might help. Thanks

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