Il giorno Tue, 02 Feb 2010 11:13:54 -0500 Frank Warmerdam <warmer...@pobox.com> ha scritto:
> Antonio Valentino wrote: > > Anyway, IMHO the point here is not to decide if we have to > > *modify* the diff function so that it returns abs(b1-b2). > > Greg asked to add a new one ( abs(b1-b2) ) to the *base set* of > > pixel functions. > > Stated that there is no technical difficulty to do this I'm > > wondering what is the Frank's mind about the question. > > Antonio, > > I think including abs(b1-b2) just demonstrates that we haven't come > up with a convenient way of stacking more basic operations (difference > and abs). > > Honestly, I'm a bit ambivalent about fleshing out the use of > pixel operations in VRT files and I've never used them myself. > I think I would prefer to wait for a more generalized expression > evaluation mechanism for VRT or possibly as a distinct driver. > > However, if there are other GDAL developers keen on this > functionality, and willing to take responsibility for integration, > documentation and support then I'm willing to let them proceed. > > Best regards, Ok Frank, thanks for the answer. -- Antonio Valentino _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
