MRXS huge white borders

[Tom N.]

To further investigate, I ran "openslide-show-properties" on the MRXS 
slide and see that it shows the huge zoom level 0 size, not matching the 
size displayed in the native viewer supplied by 3DHistech for zoom level 0.

...
openslide.background-color: 'FFFFFF'
openslide.bounds-height: '61344'
openslide.bounds-width: '44032'
openslide.bounds-x: '12681'
openslide.bounds-y: '50576'
openslide.level-count: '11'
openslide.level[0].downsample: '1'
openslide.level[0].height: '141394'    <-----
openslide.level[0].width: '62084'      <-----
...

I believe that the problem is likely to in OpenSlide and not in VIPS 
pyramid builder.

Tom

On 7/28/2014 1:21 PM, Tom N. wrote:
> I am using "vips dzsave" pyramid builder to convert an MRXS slide to
> Zoomify on Ubuntu. Vips uses OpenSlide to read the MRXS slide.  The
> conversion is working fine, but the resulting Zoomify slide has huge
> white borders. For comparison, I also run a converter on Windows which
> is based on the native library supplied by the vendor. The resulting
> Zoomify slide from the Windows based converter doesn't have the white
> borders, and has therefore half the number of tiles.
>
> Here is the ImageProperties.xml produced by the native Windows converter:
>
> <IMAGE_PROPERTIES WIDTH="44544" HEIGHT="61952" NUMTILES="56242"
> NUMIMAGES="1" VERSION="1.8" TILESIZE="256" />
>
> Here is the one produced by vips dzsave based on OpenSlide on Ubuntu:
>
> <IMAGE_PROPERTIES WIDTH="62084" HEIGHT="141394" NUMTILES="179578"
> NUMIMAGES="1" VERSION="1.8" TILESIZE="256" />
>
> Does anyone experience the same? Could this be a problem of OpenSlide or
> of VIPS pyramid builder?
>
> Thank you for any input.
> Tom
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