I had realized that, but the image that you use for the segmentation is not necessarily the image from which you want to extract the information for a classification. I think that the combined use of otbcli_BandMath and otbcli_ComputeImagesStatistics within an iterative loop that Jordi suggests will work. Thanks
On Wed, Dec 17, 2014 at 9:32 AM, Julien Michel <[email protected]> wrote: > Le 16/12/2014 19:23, Jordi Inglada a écrit : >> >> Agustin Lobo <[email protected]> wrote: >>> >>> Given a multi-spectral image and a labellised image (i.e. a >>> classification, a soil map etc ) in integers >>> is there an otbcli application to get a table with mean, sd and n for >>> each class (integer value)? >> >> I don't think this application exists, but you can script something using >> BandMath to extract a masked image of each class and use the -bv >> (background value) option of the ComputeImageStatistics on the image of each >> class. >> >> Jordi >> > Actually, the last app of the LSMS framework (otbcli_LSMSVectorization) will > do just that for you : each segment of the label image is vectorized into a > polygon in the output GIS file, and for each segment we compute the stats of > the support image (i.e. the input multispectral image) and attach these > stats as fields of the polygon. It can be seen in qgis for instance, but I > am sure there are other ways to use these info (including ogr wrapper in > OTB). > > Regards, > > Julien > > -- > Julien MICHEL > CNES - DCT/SI/AP - BPI 1219 > 18, avenue Edouard Belin > 31401 Toulouse Cedex 09 - France > Tel: +33 561 282 894 - Fax: +33 561 283 109 > > > -- > -- > Check the OTB FAQ at > http://www.orfeo-toolbox.org/FAQ.html > > You received this message because you are subscribed to the Google > Groups "otb-users" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/otb-users?hl=en > --- You received this message because you are subscribed to the Google > Groups "otb-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
