Crop a 1200×800 photo to a centered square
Calculate and verify the exact centered 1:1 crop rectangle for a 1200×800 source image.
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Reproducible crop examples
Use small numeric fixtures to verify square and 16:9 geometry before cropping a real image.
Crop a 1600×1200 image to 16:9
Derive and verify an exact centered 16:9 crop from a 1600×1200 source without stretching it.
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