Maksim, I've just done a few changes in the GeoTIFF driver to enable basic CMYK support.
See the log message of http://trac.osgeo.org/gdal/changeset/15178. And for examples : http://trac.osgeo.org/gdal/changeset/15179. Regards, Even Le Wednesday 20 August 2008 11:46:06 Maksim Sestic, vous avez écrit : > 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. > > > 2) Photoshopped tiff with CMYK mode set (that's what I need to get): > > Driver: GTiff/GeoTIFF > Files: 080417_75008_000000017_CMYK.tif > Size is 945, 945 > Coordinate System is `' > Metadata: > TIFFTAG_SOFTWARE=Adobe Photoshop CS3 Windows > TIFFTAG_DATETIME=2008:08:20 02:21:08 > 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=Undefined > Band 2 Block=945x2 Type=Byte, ColorInterp=Undefined > Band 3 Block=945x2 Type=Byte, ColorInterp=Undefined > Band 4 Block=945x2 Type=Byte, ColorInterp=Undefined > > Also, there's another Photoshop's TIFF tag, "NativeDigest", which I don't > really get (it's not recognized by gdalinfo) - here's the xmp output: > <tiff:NativeDigest > xmlns:tiff="http://ns.adobe.com/tiff/1.0/";>256,257,258,259,262,274,277,284, >530,531,282,283,296,301,318,319,529,532,306,270,271,272,305,315,33432;46BB97 >3B26CC7DED3A1C59F8F9AC7EC5</tiff:NativeDigest> > > > Regards, > Maksim Sestic _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
