Maksim Sestic wrote:
Hi all,
I'm having troubles with gdal_translate while creating uncompressed 3-band
GTiff with CMYK photometric representation. Well, at least CMYK
representation recognized by Photoshop, which is
PhotometricInterpretation=5. If I use recommended gdal_translate -co
'PHOTOMETRIC=CMYK' switch I keep getting "grayscale" (!) result, again,
that's what Photoshop says (PhotometricInterpretation=1).
What other -co parameters should I set to make it work? I'm using
gdal_translate from FWTools 2.2.3
Here's the gdalinfo reports:
1) For RGB raster parsed with gdal_translate -co 'PHOTOMETRIC=CMYK'
switch:
Size is 945, 945
Coordinate System is `'
Metadata:
AREA_OR_POINT=Area
TIFFTAG_SOFTWARE=MyApp
TIFFTAG_DATETIME=20.08.2008 02:51:37
TIFFTAG_XRESOLUTION=240
TIFFTAG_YRESOLUTION=240
TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch)
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 0.0, 0.0)
Lower Left ( 0.0, 945.0)
Upper Right ( 945.0, 0.0)
Lower Right ( 945.0, 945.0)
Center ( 472.5, 472.5)
Band 1 Block=945x2 Type=Byte, ColorInterp=Gray
Band 2 Block=945x2 Type=Byte, ColorInterp=Undefined
Band 3 Block=945x2 Type=Byte, ColorInterp=Undefined
Side note: I also tried using -co 'PHOTOMETRIC=YCBCR' and
'PHOTOMETRIC=CIELAB'switches but then gdal_translate crashes.
Maksim,
I would note that CMYK photometric interpretation requires 4 bands.
Furthermore, GDAL does *not* manage the conversion to CMYK color space.
You would need to do that ahead of time by some means.
I've never tried to create CMYK files so I don't have any further advice.
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, [EMAIL PROTECTED]
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
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
