[gdal-dev] [GDAL-dev] convert rgba alpha layer to rgb white
Hi list, Im trying to assembly some RGBA tiff in one with gdalbuildvrt and then to translate them to a RGB TIFF tiled file YCBCR jpeg compressed. No problem But now, I would like to get a white color in the background instead of the black. The following commands work but I get nodata (and so, black) on any white pixels whereas I just wanted to convert alpha to white The problem in on the vrt. gdalbuildvrt assembly.vrt -srcnodata b4 hidenodata -vrtnodata 255 *.tif gdal_translate -of GTIFF -b 1 -b 2 -b 3 -co COMPRESS=JPEG -co JPEG_QUALITY=95 -co TFW=YES -co BIGTIFF=YES -co ALPHA=NO -co TILED=YES -co PHOTOMETRIC=YCBCR -co PROFILE=BASELINE assembly.vrt assembly_JPG.tif gdaladdo -r gauss -ro --config COMPRESS_OVERVIEW JPEG --config JPEG_QUALITY_OVERVIEW 95 --config BIGTIFF_OVERVIEW YES --config PHOTOMETRIC_OVERVIEW YCBCR --config INTERLEAVE_OVERVIEW PIXEL --config NODATA_VALUES 255 assembly_JPG.tif 2 4 8 16 32 64 128 256 Do you have an idea? The problem is the is not init option, just -vrtnodata 255 255 255 to fix both background color but also the nodata bandper band Pierre CARREAUD Spécialiste en imagerie numérique carte_voeux_2014 LINGÉNIERIE DE LA DURABILITÉ SITES Entité Île-de-France Division du Développement Technique 2 bis avenue du Centre 92500 Rueil-Malmaison, France Tel : 01 41 39 02 00 / Fax : 01 41 39 02 01 http://www.sites.fr/ www.sites.fr CARRES EXPERTISE cid:image002.jpg@01CB7A74.CDE1E680 INSTRUMENTATION / MESURES cid:image002.jpg@01CB7A74.CDE1E680 INGENIERIE image001.jpgimage002.jpgimage003.jpg___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Support of KOLOR KRO raw file
Hi List, Do you know if GDAL can read .kro files ? Its KOLOR Raw format. This type of file is exported by Kolor Autopano Giga. If not, is it hard to implement? The format is following: (http://www.autopano.net/wiki-en/Format_KRO ) Header is 20 bytes long : 3 bytes : KRO signature in hex 0x4B 0x52 0x4F 1 byte : 0x01 version unsigned long : Width unsigned long : Height unsigned long : depth = 8 bits, 16 bits, 32 bits unsigned long : ncomp = number of compoment, 4 by default, RGB + Alpha Data * : the data uncompressed - Everything is stored in big endian form ( header and datas ) - the data is stored RGBA, RGBA ( or RGB, RGB if you have 3 component only ) - It's row major order, meaning, you store first row, then second row - top row is the first row - Within a row, are columns stored left-to-right - 16bits format is a 16bits integer (0..65535), not floating point ( it's not like half floating point in openEXR ) - 32bits format is pure 'c' float stored binary in big endian format ( IEEE 754 binary floating point ) - no color space specification nor metadata stored - file size limit is ruled by file system Regards, Pierre CARREAUD Responsable daffaire en topographie et lasergrammétrie LINGÉNIERIE DE LA DURABILITÉ SITES Entité Île-de-France Pôle MIR (Métrologie - Instrumentations - Relevés) 2 bis avenue du Centre 92500 Rueil-Malmaison, France Tel : 01 41 39 02 00 / Fax : 01 41 39 02 01 www.sites.fr EXPERTISEINSTRUMENTATION / MESURESINGENIERIE ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
