[gdal-dev] Does gdal_calc.py not calculate arithmetic with in the same file?

[Etienne Tourigny]

I am not sure, but you can do the following to make sure:

cp infile infile2
gdal_calc.py -A infile --A_band 1 -B infile2 --B_band 0 --outfile outfile
--calc "(A-B)/(A+B)"

Also, perhaps the extra comma in your command might be to blame "-B infile,"

Etienne


On Tue, Jul 29, 2014 at 3:46 AM, Cleo Drakos <cleo21drakos at gmail.com> wrote:

> Hi GDAL Developers,
>
> I have one GeoTIFF file with 2 bands. The data type is Byte. I want to
> calculate (Band2-Band1)/(Band2+Band1).
>
> But the following command provided a dark image:
>
> gdal_calc.py -A infile --A_band 1 -B infile, --B_band 0 --outfile outfile
> --calc "(A-B)/(A+B)"
>
> Does gdal_calc.py not calculate arithmetic with in the same file?
>
> Thanks for your time.
>
> cleo
>
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