I am generating a geotiff from a WMS source. I can do so from either PNG
requests or JPEG requests. The PNG requests have better contrast but are
4x-5x as slow.
I would like to compare the PNG and JPEG request results for a
representative area and develop a contrast correction which I can apply
Le lundi 11 mars 2013 18:55:55, Paul Norman a écrit :
I am generating a geotiff from a WMS source. I can do so from either PNG
requests or JPEG requests. The PNG requests have better contrast but are
4x-5x as slow.
I would like to compare the PNG and JPEG request results for a
From: Even Rouault [mailto:even.roua...@mines-paris.org]
Sent: Monday, March 11, 2013 12:13 PM
Subject: Re: [gdal-dev] Applying colour/contrast corrections to geotiffs
Le lundi 11 mars 2013 18:55:55, Paul Norman a écrit :
I doubt that any correction/transformation can recover the lost
Is there a way to verify if it is using this optimization?
$ gdal_translate byte.jpg byte.tif -co compress=jpeg --debug GTiff -q
GTiff: Using special copy mode from a JPEG dataset
GTiff: Setting JPEGCOLORMODE_RGB
I'm not actually
feeding it a JPEG in the command line at any point, but the WMS
From: Even Rouault [mailto:even.roua...@mines-paris.org]
Sent: Monday, March 11, 2013 1:55 PM
Subject: Re: [gdal-dev] Applying colour/contrast corrections to geotiffs
If you run nearblack to go from one JPEG in TIFF to another JPEG in
TIFF, does it use this optimization for the RGB bands
