Checker

Generate a checkered grid pattern (check, checker, chequer) as image for camera calibration or as a game board (e.g. chess, draughts/checkers/chequers, go).
Note that these are generated as raster image so the real-world dimensions depend on the output device's resolution (display, printer).
Save it via your browser's context menu's (e.g. right mouse button click or tap and hold) "Save Image As..." function.

Presets: 
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