Mailman 3 July 2010 - scikit-image

Fwd: OpenCV
by Stéfan van der Walt 15 Jul '10

15 Jul '10

Hi Michael I'm re-posting your question to the mailing list. Hopefully Chris or someone else familiar with the OpenCV functionality will be able to answer. Kind regards Stéfan ---------- Forwarded message ---------- Hi Stefan, I made it work eventually. But found a problem: cvSmooth does not work for BILATERAL filtering. If param3 and param4 are 0, just a black image is returned (even so param3 and 4 are not required for BILATERAL, and if they are set to values !=0, the source image is being returned. :( Does it work for you? On top of that I am not even able to submit a bug to OpenCV, because the ros account I had to create as mentioned here: https://code.ros.org/trac/opencv does not let me log into Trac, so I can't open a new bug. Weird... Best regards, Michael _____________________________ Universität Bern Physikalisches Institut Space and Planetary Sciences K.-Michael Aye, PhD BELA Assistant Project Manager

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Re: PyFITS plugin
by Stéfan van der Walt 03 Jul '10

03 Jul '10

Have a look at James's code here: http://github.com/jehturner/scikits.image/commit/28f5b9faf7d8840b0d120705ad… Cheers Stéfan On 3 July 2010 15:48, James Turner <jturner(a)gemini.edu> wrote: > After bothering Stefan and Chris a lot, I've added a plugin for FITS > files and some tests at the sprint, implementing imread() and > imread_collection(). > > Cheers, > > James. >

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PyFITS plugin
by James Turner 03 Jul '10

03 Jul '10

After bothering Stefan and Chris a lot, I've added a plugin for FITS files and some tests at the sprint, implementing imread() and imread_collection(). Cheers, James.

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Re: Color spaces
by Nicolas Pinto 03 Jul '10

03 Jul '10

Hey Chris, I wonder if you would be interested in seeing more color space > conversions being added to the colorconv.py module, or if you are > deliberately keeping it simple? For instance, I would like to add > conversions to and from CIE LAB, and to allow alternative white > points. > +1 on more color conversions! > I'm also interested in seeing conversions to and from human cone LMS > spaces available somewhere for SciPy users. I'm not sure whether or > not this kind of thing would be appropriate for scikits.image. > LMS is definitely interesting. We also have some code around to reproduce other human-like color spaces (e.g. opponent space from Itti & Walther, see Walther's PhD Thesis, Appendix A.2 http://bit.ly/deN6iU), as well as all the color spaces used in Geusebroek & van de Sande (as in http://bit.ly/bKg9nBor http://bit.ly/bYLF21). Would you be interested in these? I'll be happy to add them too. Please feel free to contribute any color space you'd like, possibly using Cython if you need speed. Thanks. Cheers, N > I thought I should first post a short message about this before > starting anything. I'm aware that the SciPy image sandbox used to > contain more conversions, probably in a slightly confusing way > (e.g.http://projects.scipy.org/scipy/browser/trunk/Lib/sandbox/image/ > color.py?rev=1698<http://projects.scipy.org/scipy/browser/trunk/Lib/sandbox/image/color.py?re…>). > Anyway, please let me know what you think. > > Thanks, > Chris -- Nicolas Pinto Ph.D. Candidate, Brain & Computer Sciences Massachusetts Institute of Technology, USA http://web.mit.edu/pinto

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Branch for review
by Stéfan van der Walt 02 Jul '10

02 Jul '10

Refactoring of ImageCollection to allow more generalised loading (this is needed for a FITS plugin that is being written by James Turner). http://github.com/stefanv/scikits.image/tree/imagecollection

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Re: Color spaces
by S. Chris Colbert 01 Jul '10

01 Jul '10

Yeah there are definately issues when using pure numpy for color conversions. The most salient is the inability to use a LUT to speed up the computation. This of course is trivial to do in cython and the chief reason why the fancy imshow widget is so fast when manipulating the color space. The downside is handling all the different numpy datatypes. Stefan and i are talking about the best way to do some templating with cython to avlleviate some of this. ----- Original message ----- > Hi Chris > > Sorry for the delayed response; your message was stuck in Google > Groups moderation. > > On Jun 30, 7:00 am, Chris Ball <ceb...(a)gmail.com> wrote: > > Some time ago, there was a thread about what color spaces to include > > in > > scikits.image:http://groups.google.com/group/scikits-image/browse_thread/th…... > > > > I wonder if you would be interested in seeing more color space > > conversions being added to the colorconv.py module, or if you are > > deliberately keeping it simple? For instance, I would like to add > > conversions to and from CIE LAB, and to allow alternative white > > points. > > We are definitely interested in building out the colour space > manipulation. Chris (Colbert) and I have been discussing the best way > to improve the speed of these conversions, and it may be that we'll > simply rewrite them in Cython. > > Regards > Stéfan

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Re: Color spaces
by Stefan van der Walt 01 Jul '10

01 Jul '10

Hi Chris Sorry for the delayed response; your message was stuck in Google Groups moderation. On Jun 30, 7:00 am, Chris Ball <ceb...(a)gmail.com> wrote: > Some time ago, there was a thread about what color spaces to include > in scikits.image:http://groups.google.com/group/scikits-image/browse_thread/th…... > > I wonder if you would be interested in seeing more color space > conversions being added to the colorconv.py module, or if you are > deliberately keeping it simple? For instance, I would like to add > conversions to and from CIE LAB, and to allow alternative white > points. We are definitely interested in building out the colour space manipulation. Chris (Colbert) and I have been discussing the best way to improve the speed of these conversions, and it may be that we'll simply rewrite them in Cython. Regards Stéfan

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