Help with handling 27 gigapixel image

Benjamin Gilbert bgilbert at
Fri May 4 17:29:24 EDT 2012

On 05/04/2012 06:17 AM, Leonid Bloch wrote:
> I did exactly as you said, and I've got display of something. But what I
> got displayed is just some parts of my image, not the whole thing.
> I've tried it with the smaller version first, which is a ~700 megapixels
> 16bit unsigned grayscale tiff pyramid.
> I also tried, and I've got a folder with subfolders
> with tiles in them, and still, only part of the image was there, even on
> tiles in lower number directories, which are supposed to hold large
> portions of the image. From the data displayed, I have the feeling that
> it takes just a part of an image and multiplies it to cover the whole
> image surface...
> I got the very same image displayed correctly in nip2 (VIPS GUI) so I
> guess the problem is not with it.
> Do you have any idea of what the problem might be?

Hi Leonid,

What version of OpenSlide are you using?  Version 3.2.5 had a bug that 
could sometimes result in errors like this.

Did the 700 megapixel version also display incorrectly?

Were any error messages produced by

What are the X/Y dimensions of your images?

--Benjamin Gilbert

More information about the openslide-users mailing list