openslide-python

import openslide from PIL import Image import os # NOTE: Replace 'path/to/your/slide.svs' with an actual whole-slide image file. # You might need to adjust the path if running on Windows and openslide-bin isn't used, # by adding the OpenSlide DLL directory to os.add_dll_directory(). # Example for Windows (uncomment and modify if needed): # os.add_dll_directory(r'C:\path\to\OpenSlide\bin') slide_path = os.environ.get('OPENSLIDE_TEST_SLIDE', 'path/to/your/slide.svs') try: with openslide.OpenSlide(slide_path) as slide: print(f"Slide dimensions (level 0): {slide.dimensions}") print(f"Number of levels: {slide.level_count}") print(f"Vendor: {slide.properties.get(openslide.PROPERTY_NAME_VENDOR, 'Unknown')}") print(f"Objective Power: {slide.properties.get(openslide.PROPERTY_NAME_OBJECTIVE_POWER, 'Unknown')}") # Get a thumbnail (e.g., max 200x200 pixels) thumbnail: Image.Image = slide.get_thumbnail((200, 200)) # thumbnail.save('thumbnail.png') print(f"Generated thumbnail with size: {thumbnail.size}") # Read a region at a specific level (e.g., 512x512 pixels at level 2) # region: Image.Image = slide.read_region((0, 0), 2, (512, 512)) # region.save('region_level2.png') except openslide.OpenSlideError as e: print(f"Error opening slide: {e}") except FileNotFoundError: print(f"Error: Slide file not found at '{slide_path}'")