Mailman 3 September 2017 - scikit-image

HOGDescriptor
by Peter Balazovic Sept. 9, 2017

Sept. 9, 2017

Hello. I see there is HOG descriptor implemented within scikit image, I wonder how can I reused or compare exmples given http://scikit-image.org/docs/dev/auto_examples/features_detection/plot_hog.… with OpenCV where I can find http://docs.opencv.org/3.1.0/d5/d33/structcv_1_1HOGDescriptor.html. I want to intialize and compute HoG descriptor with both same parametrs. How and which the hog paramerts from scikit relates to OpenCV one? Anyone can help? Thank you very much.

1 0

some question about h_minma (need a paremeter, and can run faster)
by imagepy＠sina.com Sept. 8, 2017

Sept. 8, 2017

Hi every one: As I mentioned befor, In the official example, use watershed to segment two circle, In this example, use pick_local_max to find the seed. But When I try on other binary images, there always are two local_max nearby, then the segment be too trivial. And I use the h_maxma and h_minma, I have some trouble: 1. when a region has more than one min value(same but not nearby), the result will mark them all. (I want to use them as seed to watershed, So I need any one, else the region will be broken, can we add a parameter to control?)2. h_minma run too slowly, (what more, the watershed run more slowly... so my program crashed! I had heard Juan will improve it in the next version) So I wrote h_minma/maxma and watershed myself (as a sub package of my project imagepy). My watershed now only support 2D, But the h_minma now is OK, works on nd. I had test one image: scikit-image's h_minma runs in 15s, and mine runs in 0.3s, 45times. I will attach my code and test image. If any one can have a look, and improve the h_minma function? I will write a issue on github soon. YXDragon

1 0

GLCM for non-rectangular image
by NASAHARA Kenlo Sept. 7, 2017

Sept. 7, 2017

Dear scikit-image community: I am trying GLCM functions in scikit-image. http://scikit-image.org/docs/dev/auto_examples/features_detection/plot_glcm… I wonder whether they can treat images with irregular shapes, such as a circle, an oval, or some more complex forms (not only rectagle). In the "greycomatrix", function: def greycomatrix(image, distances, angles, levels=None, symmetric=False, normed=False): image : array_like Integer typed input image. Only positive valued images are supported. If type is other than uint8, the argument `levels` needs to be set. the "image" seems to be required to be a rectangle. If NAN or NULL values are allowed in the "image", and the function skips treating those "no-data" pixels assigned with NAN or NULL, then we may be able to treat any shapes of image, by filling the pixels outside the boudary with NAN or NULL. However, in the source code of "_glcm_loop" function (https://searchcode.com/codesearch/view/83509141/), all the pixels within the rectangular image are scanned, without permitting "no-data". My questions: 1. Do you know how to treat GLCM in non-rectangular image with scikit-image? 2. If not, do you know any other ways to do that instead of scikit-image? 3. Do you think it is a reasonable idea to change GLCM functions in scikit-image so that they can treat no-data (allowing NAN or NULL)? -- Kenlo Nishida Nasahara Faculty of Life and Environmental Sciences University of Tsukuba, Japan 305-8572 24dakenlo(a)gmail.com

2 2

Re: [scikit-image] Release date for 0.14
by Stefan van der Walt Sept. 1, 2017

Sept. 1, 2017

Hi Egor On Fri, Sep 1, 2017, at 02:30, Egor Panfilov wrote: > I propose to set a release date for scikit-image 0.14 on the mid of > October (15th should do). Also, I'd volunteer to be a release manager > for the release.> Please, let me know if you agree. If so, I kindly ask you to take a > deep breath and try to review some of the scheduled PRs in the > coming month. That's a fantastic offer; we'll take it! :) October is also difficult to me, so let's aim for mid-November? Stéfan

1 0

回复：Re: Release date for 0.14
by imagepy＠sina.com Sept. 1, 2017

Sept. 1, 2017

Hi Juan:What do you mean "undoing the speed regression of watershed"? I found watershed run very slowly with large image, and I am writting one with numba. YXDragon ----- 原始邮件 ----- 发件人：Juan Nunez-Iglesias <jni.soma(a)gmail.com> 收件人：scikit-image List Mailing <scikit-image(a)python.org>, "Mailing_list_for_scikit-image_(http://scikit-image.org)" <scikit-image(a)python.org> 主题：Re: [scikit-image] Release date for 0.14 日期：2017年09月01日 21点48分 Hi Egor, Thanks for your support! I would prefer Nov 15 because I know for a fact that I will struggle to finish some of the major PRs that I need to get in before 0.14, including undoing the speed regression of watershed, and nd moments. (For the first one I don’t even know where to start currently.) Juan. On 1 Sep 2017, 12:31 PM +0300, Egor Panfilov <egor.v.panfilov(a)gmail.com>, wrote: Dear all, I propose to set a release date for scikit-image 0.14 on the mid of October (15th should do). Also, I'd volunteer to be a release manager for the release. Please, let me know if you agree. If so, I kindly ask you to take a deep breath and try to review some of the scheduled PRs in the coming month. Thanks in advance, and have a nice we! Regards, Egor Panfilov _______________________________________________ scikit-image mailing list scikit-image(a)python.org https://mail.python.org/mailman/listinfo/scikit-image _______________________________________________ scikit-image mailing list scikit-image(a)python.org https://mail.python.org/mailman/listinfo/scikit-image

2 1

Re: [scikit-image] Release date for 0.14
by Juan Nunez-Iglesias Sept. 1, 2017

Sept. 1, 2017

Hi Egor, Thanks for your support! I would prefer Nov 15 because I know for a fact that I will struggle to finish some of the major PRs that I need to get in before 0.14, including undoing the speed regression of watershed, and nd moments. (For the first one I don’t even know where to start currently.) Juan. On 1 Sep 2017, 12:31 PM +0300, Egor Panfilov <egor.v.panfilov(a)gmail.com>, wrote: > Dear all, > > I propose to set a release date for scikit-image 0.14 on the mid of October (15th should do). Also, I'd volunteer to be a release manager for the release. > Please, let me know if you agree. If so, I kindly ask you to take a deep breath and try to review some of the scheduled PRs in the coming month. > > Thanks in advance, and have a nice we! > > Regards, > Egor Panfilov > _______________________________________________ > scikit-image mailing list > scikit-image(a)python.org > https://mail.python.org/mailman/listinfo/scikit-image

1 0

Release date for 0.14
by Egor Panfilov Sept. 1, 2017

Sept. 1, 2017

Dear all, I propose to set a release date for scikit-image 0.14 on the mid of October (15th should do). Also, I'd volunteer to be a release manager for the release. Please, let me know if you agree. If so, I kindly ask you to take a deep breath and try to review some of the scheduled PRs in the coming month. Thanks in advance, and have a nice we! Regards, Egor Panfilov

1 0