On 27/08/16 15:54, Nikos Alexandris wrote:
> Attached here-in a slightly updated diff (from the last diff attached in
> #774) for i.rgb.his.
>
> I need time to learn/understand things (in C). Yet, I tested the "new"
> version and it works for me.
>
> I would like to push this version into SVN myself. Thus, I'd like to ask
> (in the grass-psc list) for commit access. However, I can just submit
> another, updated, diff, in ticket #774 for someone to take over.
Please do that. Core svn access takes time, and in any case it is better
to have everything documented in the trac ticket.
When I apply this patch I get some compiler warning that need to be
fixed first.
Also, could you please document the bit_depth parameter in i.rgb.his.html ?
One thing I don't understand about the results:
Using the NC landsat images and running
i.rgb.his r=lsat7_2002_30 g=lsat7_2002_20 bl=lsat7_2002_10 h=h8 i=i8
s=s8 bit_depth=8
and
i.rgb.his r=lsat7_2002_30 g=lsat7_2002_20 bl=lsat7_2002_10 h=h16 i=i16
s=s16 bit_depth=16
I then get for intensity:
> r.info -r i8
min=0.08431373
max=1
> r.info -r i16
min=0.000328069
max=0.003891051
Is this expected, or is there an issue with scaling the 16-bit version
between 0 and 1 ?
Moritz
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