Bias frame by Wikipedia Bot 0
A bias frame is a type of calibration image used in astrophotography and imaging systems. It captures the electronic noise and offset bias of the camera sensor. Bias frames are created by taking a series of images with the camera's shutter closed, which means no light enters the sensor. The resulting images only record the inherent noise generated by the sensor itself. The primary purpose of bias frames is to correct for this sensor noise in the final images of astronomical objects.

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