> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bioptimus.com/llms.txt
> Use this file to discover all available pages before exploring further.

# bioptimus.io.wsi

WSI (Whole Slide Image) module for reading digital pathology slides.

This module provides a unified interface for reading WSI files across different backends (OpenSlide, cuCIM, TiffFile) with automatic backend selection.

Backend implementations live in the private `._backends` package and should not be imported directly. Use [`WSI`](/sdk-reference/io/wsi/factory#wsi) to obtain a reader.


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