Markus Neteler wrote:
Even,
On Fri, Dec 19, 2008 at 9:26 PM, Even Rouault
<even.roua...@mines-paris.org> wrote:
Matt,
The TIFF driver also supports writing 1-bit TIFF images. See NBITS in the
Creation Options section.
For example: gdal_translate source.tif output_1bit.tif -co NBITS=1
When reading a 1-bit TIFF image, GDAL will expand each bit as a byte.
When writting a 1-bit TIFF image, GDAL will write 1 as the bit value if the
pixel value is non-zero, or 0 as the bit value if the pixel value is zero.
Just to understand: is a 1-bit TIFF written or a 1-byte TIFF with only
1 bit used?
Markus,
It is written as a true one bit file. You can even use the special 1bit
compression types (fax3 and fax4).
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmer...@pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | Geospatial Programmer for Rent
_______________________________________________
gdal-dev mailing list
gdal-dev@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/gdal-dev
