Astra Self-Calibrates Three Uncalibrated Cameras by Nudging the Arm

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Three cameras, no intrinsics, no extrinsics. Astra nudged the robot arm, learned how each camera perceives that motion, worked out the brush tip 3D offset, and verified it at new angles, all from one prompt and a tiny follow-up. The final result was under 0.2 mm of camera-measured tip movement, a demonstration of spatial understanding that removes the manual calibration step from multi-camera robot setups.