Le vendredi 13 avril 2012 19:53:41, Ethan Alpert a écrit : > > This has been running for years. Recently a customer who receives these > started scanning the JPG's for security threats. Turns out that the > JPG's I've been writing have garbage data after the JPEG EOI marker. >
This is not garbage, but mask data appended after the JPEG data stream, as documented in the JPEG driver doc : """The driver also supports the "zlib compressed mask appended to the file" approach used by a few data providers to add a bitmask to identify pixels that are not valid data.""" The mask is due to the advertized nodata value in the VRT. You can likely remove it by adding <HideNoDataValue>1</HideNoDataValue> in the VRT file under the VRTRasterBand element.
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