Is it possible in OpenEV to use an alpha band of a grey image ?
For example a TIFF file 2 samples where the second band is an alpha channel=
(in my case an extra sample tagged as TIFF unassociated alpha channel).
With RGBA images it works well.
In GDAL documentation I see only support for alpha channel in RGBA case :
"A color interpretation for the band. This is one of:
=B7 GCI_AlphaBand: this raster is the alpha portion of an RGBA image"
Can we use alpha band with other image interpretation ?
In fact I would only use a band of an image as a mask ; maybe it isn't=20
exactly the alpha channel definition/purpose...
Other question : are there plans in OpenEV to support background value(s) ?
The user could select color(s) which haven't any influence in min/max,=20
contrast optimisation, classification, ... and which aren't displayed (or=20
maybe displayed with selected colors).
Thanks in advance,