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cortex
Joined: 15 Aug 2009
Posts: 1
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 Posted: Sat Aug 15, 2009 9:36 am Post subject: LZW compression in TIFF output files for PTAssembler |
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Is there any way to disable LZW compression in the files output by PTAssembler? I've got plenty of disk space but some of my other tools can't read the generated TIFF files when they are compressed this way. Of course I can load them into Photoshop and save them with no compression, but this is laborious.
I'm interested in the files generated by the Autoalign process as well as final output of stacked images and panos built from stacked images.
I'm using PTAssembler 5.1 beta. I tried setting output files to single layer TIFF and to multiple image TIFF, but I keep getting that pesky LZW compression. There's probably some easy switch to set somewhere, but I haven't found it and didn't find anything about this in the documentation.
Thanks. |
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maxlyons
Joined: 20 Jun 2003
Posts: 3347
Location: USA
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| Posted: Sat Aug 15, 2009 10:02 am Post subject: Re: LZW compression in TIFF output files for PTAssembler |
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| cortex wrote: |
Is there any way to disable LZW compression in the files output by PTAssembler? I've got plenty of disk space but some of my other tools can't read the generated TIFF files when they are compressed this way. Of course I can load them into Photoshop and save them with no compression, but this is laborious.
I'm interested in the files generated by the Autoalign process as well as final output of stacked images and panos built from stacked images.
I'm using PTAssembler 5.1 beta. I tried setting output files to single layer TIFF and to multiple image TIFF, but I keep getting that pesky LZW compression. There's probably some easy switch to set somewhere, but I haven't found it and didn't find anything about this in the documentation.
Thanks. |
There isn't any switch in PTAssembler to change this. However, you can configure the compression used byPTAStitcher by making a small change to the script that it uses. If you click the "Show/Edit Script" button on the Step 5 screen, you'll see the script with a line like this:
p w14952 h5728 f1 u20 v180.1 p"0,0,0,0" n"TIFF_m c:LZW r:CROP"
If you remove the "c:LZW" so that the line looks like this, it will disable LZW compression:
p w14952 h5728 f1 u20 v180.1 p"0,0,0,0" n"TIFF_m r:CROP"
One thing to note is that this will change the compression used by the stitching program (i.e. PTAStitcher), but this has no impact on the compression used by the blending programs (Smartblend, Enblend), the stacking programs (TuFuse, Enfuse, CombineZ) or the program that crops the final image when created a blended TIFF file (TIFFCrop, which is a part of PTAssembler). So, if you are creating an image where one of these other programs processes the images after the stitcher has finished (i.e. you are creating a single layer stacked and/or blended TIFF image), then the resulting files will use whatever compression format that those programs employ.
Max |
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