Abstract: An automatic registration system for color television cameras which includes a calibration control circuit and a detail recognition circuit. The system operates cyclically, in each cycle determining if two of the video signals are in registration. At the conclusion of each cycle, a registration control signal is changed in accordance with any misregistration detected. The calibration control circuit monitors the calibration of the system. If a miscalibration condition is detected, the system is locked into a calibration mode wherein the system is fully calibrated before the registration process is allowed to continue. The detail recognition circuit monitors the amount of detail in the video signals in each operating cycle, and prevents the registration control signal from changing at the conclusion of those operating cycles in which insufficient detail has existed upon which a reliable registration decision could be based.