Reading file exported from Aperio ImageScope

[Benjamin Gilbert]

On 11/06/2012 05:55 PM, Kent Johnson wrote:
> The problem is in openslide-vendor-aperio.c at line 358. When adding
> associated images, it assumes that if it has only seen one level, then
> the associated image is the thumbnail. So when there is only one level,
> each associated image in turn is put into the thumbnail slot.

Hi Kent,

Thanks for tracking this down!

> I'm not sure what the fix might be. Perhaps
> the parser in add_associated_image() could be smarter, or the default at
> line 358 could be taken only if there is not already an associated image.

Actually it's a pretty minor fix: we should be using the TIFF directory 
index to detect the thumbnail, not the number of tiled directories we've 
already read.

Fix:
https://github.com/openslide/openslide/commit/837624d7

Windows build with the fix:
http://openslide.cs.cmu.edu/download/tmp/openslide-win32-20121106.zip

--Benjamin Gilbert