Mailman 3 July 2012 - scikit-image

Euroscipy 2012: early bird registration ending soon
by Emmanuelle Gouillart 10 Jul '12

10 Jul '12

Hello, early bird registration for Euroscipy 2012 is soon coming to an end, with the deadline on July 22nd. Don't forget to register soon! Reduced fees are available for academics, students and speakers. Registration takes place online on http://www.euroscipy.org/conference/euroscipy2012. Euroscipy 2012 is the annual European conference for scientists using the Python language. It will be held August 23-27 2012 in Brussels, Belgium. Our program has been online for a few weeks now: we're very excited to have a great selection of tutorials, as well as talks and poster presentations. During the two days of tutorials (August 23 and 24), it will possible to attend either the introduction track, or the advanced track, or to combine both tracks (see http://www.euroscipy.org/track/6538?tab=tracktalkslist and http://www.euroscipy.org/track/6539?tab=tracktalkslist). As for the highlights of the two days of conference (August 25 and 26), we are very happy to have David Beazley (http://www.dabeaz.com) and Eric Jones (http://www.enthought.com/company/support-team.php) as our keynote speakers. The list of talks is available on http://www.euroscipy.org/track/6540?tab=tracktalkslist, with subjects ranging from extension programming to machine learning, or cellular biology. We're looking forward to exciting discussions during the talk sessions or around the posters, as happened during the previous editions of Euroscipy! Sprints may be organized at the conference venue during the days following the conference, from Monday 27th on. Since there is a limited number of rooms booked for the sprints, please contact the organizers by July 22 if you intend to organize one. Two sprints are already planned by the scikit-learn and the scikits-image teams. The EuroSciPy 2012 conference will feature a best talk, a best poster and a jury award. All conference participants will be given the opportunity to cast a vote for the best talk and best poster awards while the jury award is selected by the members of the program committee. Each prize consists of a Commercial Use license for Wing IDE Professional, an integrated development environment designed specifically for Python programmers. The licenses are generously donated by Wingware. Financial support may be granted by Numfocus to a small number of eligible students. See http://www.euroscipy.org/card/euroscipy2012_support_numfocus for more details on how to apply. For information that cannot be found on the conference website, please contact the organizing team at org-team(a)lists.euroscipy.org Cheers, Emmanuelle, for the organizing team

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Challenge: chessboard corners
by Stéfan van der Walt 10 Jul '12

10 Jul '12

Our implementation of Canny edge detection and the Hough Transform should help to beat the following challenge: http://stackoverflow.com/questions/10196198/how-to-remove-convexity-defects…

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Re: bug in radon transform?
by casper 09 Jul '12

09 Jul '12

Thanks, Stefan. I changed the code to work with the same angle set - work fine. Thanks a lot. Casper On Monday, July 9, 2012 11:31:01 AM UTC-7, Stefan van der Walt wrote: > > Hi Casper > > There is a bug in the modified version of the example. You compute > "projections" twice, but the second time without specifying the > angles. I.e., by default the 180 directions are used. You then try > to reconstruct from that, but specifying the incorrect angles. > > Here's a pull request to raise a better message when this happens: > > https://github.com/scikits-image/scikits-image/pull/211 > > Stéfan > > On Mon, Jul 9, 2012 at 9:55 AM, casper <dima.osin(a)gmail.com> wrote: > > Here is the code, that I took from the skimage gallery: >

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Re: bug in radon transform?
by Stéfan van der Walt 09 Jul '12

09 Jul '12

Hi Casper There is a bug in the modified version of the example. You compute "projections" twice, but the second time without specifying the angles. I.e., by default the 180 directions are used. You then try to reconstruct from that, but specifying the incorrect angles. Here's a pull request to raise a better message when this happens: https://github.com/scikits-image/scikits-image/pull/211 Stéfan On Mon, Jul 9, 2012 at 9:55 AM, casper <dima.osin(a)gmail.com> wrote: > Here is the code, that I took from the skimage gallery:

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Re: Stereograms
by Stéfan van der Walt 09 Jul '12

09 Jul '12

On Mon, Jul 9, 2012 at 4:26 AM, Jaidev Deshpande <deshpande.jaidev(a)gmail.com> wrote: > This is seriously cool... > > Just to make sure - is it a stereogram of the skimage logo? That's it! I think the distance calculation can still be improved; I don't yet get 100% smooth surfaces. Sometimes, conflicting stereo pixel assignments arise, and I'm not sure how to best choose between them. Either way, lots of fun :) Stéfan

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Re: Stereograms
by Jaidev Deshpande 09 Jul '12

09 Jul '12

On Mon, Jul 9, 2012 at 2:17 PM, Stéfan van der Walt <stefan(a)sun.ac.za> wrote: > Know how to view stereograms? Then you'd enjoy this! > > http://mentat.za.net/refer/stereogram_skimage.png > > Generated with the work-in-progress stereogram branch (test script attached): > > https://github.com/stefanv/scikits-image/tree/stereogram > > Stéfan Hi, This is seriously cool... Just to make sure - is it a stereogram of the skimage logo?

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Re: Stereograms
by Andreas Mueller 09 Jul '12

09 Jul '12

On 07/09/2012 09:47 AM, StÃ¯Â¿Â½fan van der Walt wrote: > Know how to view stereograms? Then you'd enjoy this! > > http://mentat.za.net/refer/stereogram_skimage.png > > Generated with the work-in-progress stereogram branch (test script attached): > > https://github.com/stefanv/scikits-image/tree/stereogram > > StÃ¯Â¿Â½fan Sweet! Pretty cool :)

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Stereograms
by Stéfan van der Walt 09 Jul '12

09 Jul '12

Know how to view stereograms? Then you'd enjoy this! http://mentat.za.net/refer/stereogram_skimage.png Generated with the work-in-progress stereogram branch (test script attached): https://github.com/stefanv/scikits-image/tree/stereogram Stéfan

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Re: JPEG artifacts detection
by Stéfan van der Walt 08 Jul '12

08 Jul '12

On Tue, Jul 3, 2012 at 5:56 PM, klo uo <klonuo(a)gmail.com> wrote: > I was wondering if it's possible by using scikits-image to detect if > arbitrary image suffers from compression artifacts. The easiest may be to load the image, then save it again as JPG. If the image size remains the same, you probably had a JPG to start with. Stéfan

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Re: JPEG artifacts detection
by klo uo 07 Jul '12

07 Jul '12

For reference: http://stackoverflow.com/questions/11332590/jpeg-artifacts-detection

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