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November 2011
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2011.12.13 13:08 "Re: Inconsistent metadata report for CMYK 8-bit image", by <mateusz@loskot.net>
On 30 November 2011 13:58, Even Rouault <even.rouault@mines-paris.org> wrote: >> >> #################################################################### >> 2) gdalinfo (from current OSGeo4W package) >> >> C:\> gdalinfo Shadow_cmyk8.tif >> Warning 1: TIFFReadDirectory:Unknown field with tag 37724 (0x935c) >> encountered >> Driver: GTiff/GeoTIFF >> Files: Shadow_cmyk8.tif >> Size is 768, 505 >> Coordinate System is `' >> Metadata: >> TIFFTAG_SOFTWARE=Adobe Photoshop CS3 Windows >> TIFFTAG_DATETIME=2011:10:31 14:09:04 >> TIFFTAG_XRESOLUTION=72 >> TIFFTAG_YRESOLUTION=72 >> TIFFTAG_RESOLUTIONUNIT=2 (pixels/inch) >> Image Structure Metadata: >> SOURCE_COLOR_SPACE=CMYK >> INTERLEAVE=PIXEL >> Corner Coordinates: >> Upper Left ( 0.0, 0.0) >> Lower Left ( 0.0, 505.0) >> Upper Right ( 768.0, 0.0) >> Lower Right ( 768.0, 505.0) >> Center ( 384.0, 252.5) >> Band 1 Block=768x2 Type=Byte, ColorInterp=Red >> Mask Flags: PER_DATASET ALPHA >> Band 2 Block=768x2 Type=Byte, ColorInterp=Green >> Mask Flags: PER_DATASET ALPHA >> Band 3 Block=768x2 Type=Byte, ColorInterp=Blue >> Mask Flags: PER_DATASET ALPHA >> Band 4 Block=768x2 Type=Byte, ColorInterp=Alpha >> >> Which one is right? >> How many bits per sample and how many samples per pixel is there? > > By default, with unusual color spaces like CMYK, GDAL will go through the > libtiff RGBA API that does the colorspaces conversions and expose a > regular RGBA > dataset to GDAL. > > You can try however : gdalinfo GTIFF_RAW:Shadow_cmyk8.tif Even, I had no idea about this option. It looks someone is on "new feature into GDAL every day" rampage ;D Big thanks! Best regards, -- Mateusz Loskot, http://mateusz.loskot.net Charter Member of OSGeo, http://osgeo.org Member of ACCU, http://accu.org _______________________________________________ Tiff mailing list: Tiff@lists.maptools.org http://lists.maptools.org/mailman/listinfo/tiff http://www.remotesensing.org/libtiff/