Bom dia, No resultado da conversão ainda ficaram alguns pixeis que deveriam ser também transparentes. Provavelmente são alguns pixeis que não são exatamente o RBG 255 255 255.
Será que há alguma coisa que se pode fazer em relação a estes pixeis? No dia 19 de outubro de 2016 às 16:20, Marco Afonso <mafonso...@gmail.com> escreveu: > > Muito obrigado Pedro Monteiro :) > > No dia 19 de outubro de 2016 às 15:33, Pedro Monteiro < > monteiro.s.pe...@gmail.com> escreveu: > >> Boa tarde, >> >> Penso que o mais simples será criar um raster virtual com transparência, >> e posteriormente fazer a conversão deste para tif >> >> Exemplo: >> >> 1. gdalbuildvrt -srcnodata "255 255 255" destino.vrt entrada.jpg >> 2. gdal_translate -of Gtiff destino.vrt destino.tif >> >> Cumprimentos, >> Pedro Monteiro >> >> On Wed, Oct 19, 2016 at 2:13 PM Marco Afonso <mafonso...@gmail.com> >> wrote: >> >>> Boa tarde, >>> >>> Julgo que a questão será direccionada para os GDAL masters :) >>> >>> Gostaria de saber se é possível converter um ficheiro no formato JP2000 >>> para TIF com transparência. Se possível definir a côr branco (RGB 255 >>> 255 255) para transparência. >>> >>> Compressão para o ficheiro de saída TIF não é requisito para já. >>> >>> Segue a informação obtida pelo GDALINFO do ficheiro de origem. >>> >>> Obrigado! :) >>> >>> Driver: JP2MrSID/MrSID JPEG2000 >>> Files: pu_luz_zonamento.jp2 >>> pu_luz_zonamento.jp2.ovr >>> pu_luz_zonamento.jp2.aux.xml >>> Size is 6636, 6122 >>> Coordinate System is: >>> PROJCS["ETRS_1989_TM06-Portugal", >>> GEOGCS["GCS_ETRS_1989", >>> DATUM["European_Terrestrial_Reference_System_1989", >>> SPHEROID["GRS_1980",6378137,298.257222101, >>> AUTHORITY["EPSG","7019"]], >>> AUTHORITY["EPSG","6258"]], >>> PRIMEM["Greenwich",0], >>> UNIT["degree",0.0174532925199433]], >>> PROJECTION["Transverse_Mercator"], >>> PARAMETER["latitude_of_origin",39.66825833333333], >>> PARAMETER["central_meridian",-8.133108333333333], >>> PARAMETER["scale_factor",1], >>> PARAMETER["false_easting",0], >>> PARAMETER["false_northing",0], >>> UNIT["metre",1, >>> AUTHORITY["EPSG","9001"]]] >>> Origin = (37881.833519887965000,-285245.409715688320000) >>> Pixel Size = (0.169333333333329,-0.169333333333331) >>> Metadata: >>> Corder=PCRL >>> GEOTIFF_CHAR__GeogAngularUnitsGeoKey=Angular_Degree >>> GEOTIFF_CHAR__GeogGeodeticDatumGeoKey=Datum_European_ >>> Reference_System_1989 >>> GEOTIFF_CHAR__GeographicTypeGeoKey=User-Defined >>> GEOTIFF_CHAR__GTModelTypeGeoKey=ModelTypeProjected >>> GEOTIFF_CHAR__GTRasterTypeGeoKey=RasterPixelIsArea >>> GEOTIFF_CHAR__ProjCoordTransGeoKey=CT_TransverseMercator >>> GEOTIFF_CHAR__ProjectedCSTypeGeoKey=User-Defined >>> GEOTIFF_CHAR__ProjectionGeoKey=User-Defined >>> GEOTIFF_CHAR__ProjLinearUnitsGeoKey=Linear_Meter >>> GEOTIFF_NUM__1024__GTModelTypeGeoKey=1 >>> GEOTIFF_NUM__1025__GTRasterTypeGeoKey=1 >>> GEOTIFF_NUM__1026__GTCitationGeoKey=PCS Name = ETRS_1989_TM06-Portugal >>> GEOTIFF_NUM__2048__GeographicTypeGeoKey=32767 >>> GEOTIFF_NUM__2049__GeogCitationGeoKey=GCS Name = >>> GCS_ETRS_1989|Ellipsoid = GRS_1980|Primem = Greenwich| >>> GEOTIFF_NUM__2050__GeogGeodeticDatumGeoKey=6258 >>> GEOTIFF_NUM__2054__GeogAngularUnitsGeoKey=9102 >>> GEOTIFF_NUM__2057__GeogSemiMajorAxisGeoKey=6378137.000000 >>> GEOTIFF_NUM__2059__GeogInvFlatteningGeoKey=298.257222 >>> GEOTIFF_NUM__2061__GeogPrimeMeridianLongGeoKey=0.000000 >>> GEOTIFF_NUM__3072__ProjectedCSTypeGeoKey=32767 >>> GEOTIFF_NUM__3074__ProjectionGeoKey=32767 >>> GEOTIFF_NUM__3075__ProjCoordTransGeoKey=1 >>> GEOTIFF_NUM__3076__ProjLinearUnitsGeoKey=9001 >>> GEOTIFF_NUM__3080__ProjNatOriginLongGeoKey=-8.133108 >>> GEOTIFF_NUM__3081__ProjNatOriginLatGeoKey=39.668258 >>> GEOTIFF_NUM__3082__ProjFalseEastingGeoKey=0.000000 >>> GEOTIFF_NUM__3083__ProjFalseNorthingGeoKey=0.000000 >>> GEOTIFF_NUM__3092__ProjScaleAtNatOriginGeoKey=1.000000 >>> Image Structure Metadata: >>> INTERLEAVE=PIXEL >>> Corner Coordinates: >>> Upper Left ( 37881.834, -285245.410 <285%20245%20410>) ( >>> 7d42'25.13"W, 37d 5'52.09"N) >>> Lower Left ( 37881.834, -286282.068 <286%20282%20068>) ( >>> 7d42'25.32"W, 37d 5'18.46"N) >>> Upper Right ( 39005.530, -285245.410 <285%20245%20410>) ( >>> 7d41'39.62"W, 37d 5'51.92"N) >>> Lower Right ( 39005.530, -286282.068 <286%20282%20068>) ( >>> 7d41'39.82"W, 37d 5'18.29"N) >>> Center ( 38443.682, -285763.739 <285%20763%20739>) ( 7d42' >>> 2.47"W, 37d 5'35.19"N) >>> Band 1 Block=1024x128 Type=Byte, ColorInterp=Red >>> Min=0.000 Max=255.000 >>> Minimum=0.000, Maximum=255.000, Mean=236.038, StdDev=66.045 >>> NoData Value=256 >>> Overviews: 3318x3061, 1659x1531, 830x766, 415x383, 208x192 >>> Metadata: >>> STATISTICS_COVARIANCES=4361.995430900208,2244.864802420663, >>> 3368.225850604773 >>> STATISTICS_MAXIMUM=255 >>> STATISTICS_MEAN=236,03793160725 >>> STATISTICS_MINIMUM=0 >>> STATISTICS_SKIPFACTORX=1 >>> STATISTICS_SKIPFACTORY=1 >>> STATISTICS_STDDEV=66,045404313247 >>> Image Structure Metadata: >>> COMPRESSION=JP2000 >>> Band 2 Block=1024x128 Type=Byte, ColorInterp=Green >>> Min=0.000 Max=255.000 >>> Minimum=0.000, Maximum=255.000, Mean=218.476, StdDev=87.277 >>> NoData Value=256 >>> Overviews: 3318x3061, 1659x1531, 830x766, 415x383, 208x192 >>> Metadata: >>> STATISTICS_COVARIANCES=2244.864802420663,7617.276745283226, >>> 7051.036243014802 >>> STATISTICS_MAXIMUM=255 >>> STATISTICS_MEAN=218,47574597805 >>> STATISTICS_MINIMUM=0 >>> STATISTICS_SKIPFACTORX=1 >>> STATISTICS_SKIPFACTORY=1 >>> STATISTICS_STDDEV=87,277011551056 >>> Image Structure Metadata: >>> COMPRESSION=JP2000 >>> Band 3 Block=1024x128 Type=Byte, ColorInterp=Blue >>> Min=0.000 Max=255.000 >>> Minimum=0.000, Maximum=255.000, Mean=215.145, StdDev=92.105 >>> NoData Value=256 >>> Overviews: 3318x3061, 1659x1531, 830x766, 415x383, 208x192 >>> Metadata: >>> STATISTICS_COVARIANCES=3368.225850604773,7051.036243014802, >>> 8483.403263628108 >>> STATISTICS_MAXIMUM=255 >>> STATISTICS_MEAN=215,14531106402 >>> STATISTICS_MINIMUM=0 >>> STATISTICS_SKIPFACTORX=1 >>> STATISTICS_SKIPFACTORY=1 >>> STATISTICS_STDDEV=92,105392152838 >>> Image Structure Metadata: >>> COMPRESSION=JP2000 >>> >>> >>> -- >>> Regards, >>> Marco Afonso >>> http://goo.gl/ZDtQjm >>> >>> _______________________________________________ >>> Portugal mailing list >>> Portugal@lists.osgeo.org >>> http://lists.osgeo.org/mailman/listinfo/portugal >> >> >> _______________________________________________ >> Portugal mailing list >> Portugal@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/portugal >> > > > > -- > Regards, > Marco Afonso > http://goo.gl/ZDtQjm > > -- Regards, Marco Afonso http://goo.gl/ZDtQjm
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