[otb-users] Extended filename for band selection

[Guillaume Pasero]

Dear users, A new feature is in development to provide an extended filename for input band selection (see extended_band). A simple use-case is when you have a multi-channel image, and you want to process only the second band of this image using an OTB Application. With this feature you could do it like this : otbcli_MyApplication -in  "my_image.tif?band=2"  -out output.tif The current syntax (inspired by Python syntax) has already been implemented : band=r1,r2,...,rn     where each 'ri' is a generic range A generic range can be : A single band index : '1' is the first band, for negative numbers the numbering is backward ( '-1' is the last band) A range of bands, using the character ':' between optional start and end indexes : '3:' means the 3rd band until the last one ':-2' means the first band until the second to last '2:4' means bands 2, 3 and 4 We would like to have your feedback on several points : We will likely change the keyword "band" to plural "bands", no objection ? Is the syntax clear / convenient / confusing ? There can be a debate between 0-based and 1-based indexing for band numbers. At the moment, it is not uniform in OTB but we think that 1-based indexing should be the convention exposed to the user. It is also possible to implement it on image writers, would it help ? What would be your use-cases ? Thanks for your feedback, Guillaume -- Guillaume PASERO Responsable technique Business Unit ESPACE & GeoInformation - Département Payload Data & Applications CS Systèmes d'Information Parc de la Grande Plaine - 5, Rue Brindejonc des Moulinais - BP 15872 31506 Toulouse Cedex 05 - FRANCE +33 561 17 64 21 - guillaume.pas...@c-s.fr -- -- 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 otb-users@googlegroups.com To unsubscribe from this group, send email to otb-users+unsubscr...@googlegroups.com 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 otb-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.