Nanozoomer annotation coordinate system to openslide pixels
ahmedbassi at gmail.com
Mon Nov 10 02:27:32 EST 2014
I am currently trying to use openslide to automatically open up nanozoomer
ndpi files and extract regions automatically. NDP annotation files (ndpa)
are used to mark ROIs. I know that annotations are not part of openslide as
of yet, but I wonder if anyone has an idea about my simple query.
The NDP annotations seems to use their own coordinate system which I can
not convert to the openslide pixel based system to extract the pictures.
(some of the point coordinates are actually negative!! weird! see example
<annotation type="freehand" displayname="Rectangular Area"
I wonder if anyone dabbled in something like this and have an idea what
sort of scaling +/- offsetting that they use for marking ROIs like this.
There is only one github module that may be of help in this conversion, but
I failed to run the conversion code on linux and the project seems
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