Automatic Calibration Description

The color calibration process takes place during the first acquisition phase of a MultiCam acquisition sequence when the WBO_Mode is set to ONCE.

The color calibrator analyzes a rectangular area (AWB_AREA) of one uncorrected image and computes a correcting gain factor for each RGB color component.

The correction factor for the color component having the strongest response is always 1; the correction factors for the weakest color components are greater than 1.

Providing that the requirements of the color source equipment, the calibration target and the acquisition channel settings are fulfilled, the calibrator estimates the gain factors with an accuracy better than 1/1000.

Applying the calculated gain correction factors to the White Balance Operator for subsequent image acquisitions allows on-the-fly color balancing of the acquired images.

The calibrator returns a NOT_OK status in the following cases:
  • Excessive color imbalance.
  • Not enough pixels satisfying the calibration target requirements in the AWB_AREA.