[gdal-dev] Re: Proposal: gdal_muladd.py

[Antonio Valentino]

Il giorno Tue, 02 Feb 2010 11:13:54 -0500
Frank Warmerdam <warmerdam at 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