how does openslide do image downsampling

[yuzhou at andrew.cmu.edu]

Good morning Benjamin,

I have a similar question. When I use OpenSlide to read a svs image which
has 11 layers, it can only read three of them. When I use the get
information function in OpenSlide, it also returns 3 layers, not 11 (In
Matlab, it's also 11 layers). I am very confused about what happened.

Thanks,
Yu



> On 01/25/2015 03:25 AM, 石川　拓海 wrote:
>> 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
>
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