Tap start when you’re ready.
Live view
Flattened preview
Lighting, blur, and JPEG artifacts affect detection. For best results, print corner markers with a visible white quiet zone, fill the frame, and hold steady.
Experimental
Uses your camera to find four AprilTag36h11 corner markers, decode the Castalia sheet word, and draw a rough perspective flatten of the page (11∶17 proportion).
Tap start when you’re ready.
Lighting, blur, and JPEG artifacts affect detection. For best results, print corner markers with a visible white quiet zone, fill the frame, and hold steady.