how does openslide do image downsampling

[石川 拓海]

Hi Benjamin?,


Thanks for the help.

I'm using a NDPI format (Hamamatsu format) image. Does OpenSlide creates extra slide levels for this format?

If so, do you know how does libjpeg do image downsampling? Gaussian pyramid?


Thanks


-- Takumi Ishikawa


>> I would like to know how Openslide do image downsampling.

> OpenSlide tries not to do any downsampling itself: it usually just
> returns the downsampled pixels already stored in the slide file.
> (Hamamatsu formats are an exception: OpenSlide sometimes creates extra
> slide levels using libjpeg's support for downsampling during JPEG decode.)

> Do you have a specific question?

> --Benjamin Gilbert

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.andrew.cmu.edu/pipermail/openslide-users/attachments/20150127/d52e8c5d/attachment-0001.html