Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

Thanks for the explanation. This kind of background is essential to understand the methods and thus use them right. Just to fully clarify, for a given keypoint in image1, is the ratio of "the distance to the closest to the distance to the second closest" computed to all keypoints of image 2 or

Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

Hi again, Well, you really need to dig into sift/surf methods to answer properly (see [1] for instance). To make it short : - The standard sift matching using the ratios will try to match all the keypoints and is more general, as sift matching is invariant to rotation, scaling ... You could

Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

I get a segmentation fault almost every time I use the SIFT method, thus I use SURF instead. I understand your remarks are valid for SURF as well. Thanks On Tue, Sep 1, 2015 at 10:09 AM, Julien Michel wrote: > Hi again, > > Well, you really need to dig into sift/surf

Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

There are stability issues with siftfast (our 3rd party sift implementation) but when it works, it is smoking fast ... Surf are essentially like sift, except that the descriptors is slightly shorter. Matching procedure is the same. Le 01/09/2015 13:55, Agustin Lobo a écrit : I get a

Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

Le 31/08/2015 14:29, Agustin Lobo a écrit : Actually, I do not quite understand: Is mfilter stating whether homologous points are filtered according to the value of "precision"? yes What do you mean by " padded according to the user defined *precision*.? I mean that in geobins mode, we

Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

Actually, I do not quite understand: Is mfilter stating whether homologous points are filtered according to the value of "precision"? What do you mean by " padded according to the user defined *precision*.? What is threshold? Is it a radiometric distance or an spatial distance? I have tested and

Re: [otb-users] Homologous Point Extrtaction: mfilter? precision?

Hi Agus, The readthedoc documentation export is experimental (Rashad did this a while ago), and surely has some unsolved issues for now. If you refer to the official documentation here : https://www.orfeo-toolbox.org/CookBook/CookBooksu103.html#x136-6690005.6.7 You will see that the table

[otb-users] Homologous Point Extrtaction: mfilter? precision?

Doc on Homologous Point Extraction http://otbcb.readthedocs.org/en/latest/Applications/app_HomologousPointsExtraction.html is incomplete. For example, the only information provided on argument mfilter is that it is a Boolean. No definition, no default value, no example. Instead, the command line