n,
Raymond.
From: gdal-dev on behalf of Chastain,
Raymond Lee (MU-Student)
Sent: Tuesday, October 5, 2021 3:13 PM
To: gdal-dev@lists.osgeo.org ; br...@frogmouth.net
Subject: Re: [gdal-dev] Blue artifact dots in shadows when using GDAL to create
mosaics
Thank
: gdal-dev@lists.osgeo.org
Cc: Chastain, Raymond Lee (MU-Student)
Subject: Re: [gdal-dev] Blue artifact dots in shadows when using GDAL to create
mosaics
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Process is very simple
1. Take our tiles and build a virtual raster:
gdalbuildvrt -r lanczos -resolution HIGHEST output.vrt -input_file_list
input_file_list.txt
2. Convert our virtual raster to a GeoTIFF:
3. gdal_translate -of GTIFF ./output.vrt ./output.tif
The artifacts occur with all
We're trying to create NITFs with lossless compression using the OpenJPEG
driver for JPEG2000 compression.
We've set the "QUALITY=100" creation option but are still noticing that
repeated conversions generate different perceptual image hashes.
The OpenJPEG driver mentions "REVERSIBLE=YES" but t
When we enable JPEG-2000 compression (or any IC=* creation option) alongside
"SDE_TRE=YES" we get:
"Warning 1: Unable to locate COMRAT to update in NITF header."
We require the precision increase provided by "SDE_TRE=YES" and dropping the IC
creation option
explodes the size of our final mosaics
