TrainImagesClassifier and TrainVectorClassifier perform training but on different inputs.
TrainImagesClassifier takes as input one or multiple images and separately polygons with class label associated to each polygon. Pixels inside those polygons will be used to create the training set The TrainVectorClassifier should be used in the case where you've only a vector file which contains positions and values which corresponds to sample values for each position (for instance a vector layer of points). TrainVectorClassifier is used for instance in the sampling processing where after extracting pixel positions and values, the vector of points obtain is used as input for the TrainVectorClassifier. I would advise to follow the "Pixel based classification" recipe in the cookbook: <goog_903394397> https://www.orfeo-toolbox.org/CookBook/recipes/pbclassif.html#pixel-based-classification You'll be able to use as input multiple images and multiple shapefiles at the same time for the training. Le ven. 14 sept. 2018 à 13:47, Efi <[email protected]> a écrit : > Dear All, > > I want to perform object-based classification on SAR images for oil spill > detection. The OTB tools I intend to use are TrainVectorClassifier and > VectorClassifier. As I understand so far, The tool TrainVectorClassifier > takes input polygons only form ONE layer, as opposed to the tool > TrainImagesClassifier that accepts input from more than one layers. Since > oil spills can significantly vary in size and shape (ex. see attached > images), I was wondering if there is a way to provide data from more than > one layers when applying TrainVectorClassifier. Any help and ideas will be > appreciated, > Best, > Liten > > -- > -- > 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. > -- Manuel Grizonnet -- -- 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.
