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August 2017

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2017.08.30 16:07 "problems saving BigTIFF format", by Paul Hemmer
2017.08.30 16:17 "Re: problems saving BigTIFF format", by Kemp Watson
2017.08.30 16:27 "Re: problems saving BigTIFF format", by Paul Hemmer
2017.08.30 16:47 "Re: problems saving BigTIFF format", by Kemp Watson
2017.08.30 17:11 "Re: problems saving BigTIFF format", by Bob Friesenhahn
2017.08.30 17:14 "Re: problems saving BigTIFF format", by Paul Hemmer
2017.08.30 17:36 "Re: problems saving BigTIFF format", by Bob Friesenhahn
2017.08.30 16:37 "Re: problems saving BigTIFF format", by Bob Friesenhahn
2017.08.30 17:55 "Re: problems saving BigTIFF format", by Paul Hemmer
2017.08.30 18:32 "Re: problems saving BigTIFF format", by Bob Friesenhahn
2017.08.31 10:16 "Re: problems saving BigTIFF format", by <jcupitt@gmail.com>
2017.09.01 21:40 "Re: problems saving BigTIFF format", by Paul Hemmer
2017.08.30 17:38 "problems saving BigTIFF format", by Roger Leigh
2017.09.01 14:06 "Re: problems saving BigTIFF format", by Paul Hemmer

2017.08.30 16:37 "Re: problems saving BigTIFF format", by Bob Friesenhahn

On Wed, 30 Aug 2017, Paul Hemmer wrote:

> Is anything other than specifying "w8" in TIFFOpen() required to
> successfully create a BigTIFF file?
>
> When my dataset is < 4GB and I open with "w" and write the data, I can
> view the image just fine.
>
> When it is > 4GB and I use "w8" to open, all else the same, then the 
> resulting file cannot be opened by any of the image viewers I can 
> find that are said to support BigTIFF (IMARIS, Nikon Elements, 
> FIJI/BioFormats, and VeryLargeImageViewer)

I don't know anything about those programs.  Have you tried 
GraphicsMagick built against libtiff 4.XX?

   % gm convert input.png bigtiff:output.tiff
   % gm identify output.tiff
   output.tiff BIGTIFF 914x610+0+0 DirectClass 8-bit 57.9Ki 0.000u
   0m:0.000001s
   % gm convert output.tiff output.jpg

Bob
-- 
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/