Open Slide Read Region

[Stephen Yip]

Hi,

Let me clarify my question. I attempted to map level 2 to level 0 coordinate by multiplying the former 8 times, but there was a "significant" shift in this mapping procedure. And the amount shift depends on the location, which is super bizarre to me.

Does anyone know how to map from level 2 or 1 to level 0 coordinate and vice versa? 

Thanks!
Stephen 

> On Jun 9, 2017, at 2:36 AM, Benjamin Gilbert <bgilbert at cs.cmu.edu> wrote:
> 
>> On Fri, Jun 09, 2017 at 12:29:42AM -0400, Stephen Yip wrote:
>> I am trying to crop a level_0 region out based on the level_2 region using
>> the osi.OpenSlide().read_region(). The resolution of level_0 is *eight*
>> times higher than level_2.
>> 
>> I used the read_region function for cropping.
>> osi.OpenSlide().read_region(x1,y1,level=0,dim1,dim2)
>> 
>> where (x1,y1) are the coordinate of the below green rectangle (see figure)
>> multiply by *eight*.
> 
> Hi Stephen,
> 
> (x1, y1) are always level 0 coordinates, regardless of the level you are
> reading.
> 
> --Benjamin Gilbert
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