install question

[David Gutman]

i use vips a lot... thanks for the pointers...
On Mar 30, 2012 4:50 PM, "Benjamin Gilbert" <bgilbert at cs.cmu.edu> wrote:

> On 03/30/2012 03:48 PM, David Gutman wrote:
> > Also is there any documentation anywhere for the python-tools?  Or do
> > I have to just figure it out from doing a dir(python-tools) or
> > whatever and walk through the functions?
>
> Try help('openslide') and help('openslide.deepzoom').
>
> > I saw there's a write_as_png or something that will write out a
> > cropped area from a given layer.. just trying to do something similar
> > in an "all" python way (And also want to write a TIFF and not PNG).
>
> For small layers, you could do:
>
>   slide = OpenSlide('CMU-1.svs')
>   region = slide.read_region((0, 0), level,
>                              slide.level_dimensions[level])
>   # region is a PIL.Image
>   region.save('out.tiff')
>
> (Note that OpenSlide is now calling layers "levels", since everyone else
> already does.)
>
> However, PIL does not seem to support BigTIFF, or large images
> generally.  Also, this will load the entire level into RAM.  So this
> approach is not recommended.
>
> You may want to check out libvips, which is an image processing library
> specifically designed for working with images that cannot fit into RAM.
>  The current release, version 7.28, can load images from OpenSlide, and
> it knows how to write TIFF.  Python bindings are available.
>
> --Benjamin Gilbert
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