Thanks Even. I realised that I was using OpenJPEG driver (some old version) which does not support overviews. I intend to use MrSID which worked as expected.
Thanks a lot. On Thu, May 17, 2012 at 2:09 PM, Even Rouault <[email protected]>wrote: > Le jeudi 17 mai 2012 20:04:30, Jayesh Chaudhary a écrit : > > Folks, > > > > I have written a GDAl based reader and I am trying to read JPEG 2000 > > images. When I ran gdalinfo on one of the samples images from here: > > http://www.openjpeg.org/index.php?menu=samples, it does not list > subdataset > > or overviews ( I was expecting overviews ). > > There are no concept of subdataset with JPEG2000 drivers, so this is > expected. > > As far as overviews, it depends on the particular JPEG2000 driver that you > uses. JP2ECW, JP2MrSID and JP2KAK should expose them. (JP2ECW exposes > arbitrary overviews). But JP2OpenJPEG or JPEG2000 (Jasper based) drivers > aren't sufficiently advanced to expose overviews. > >
_______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
