Features AW00136902000116 Basler dart BCON11.11.3 Gain AutoGain Auto is the automatic counterpart to manually setting the Gain parameter. The gain autofunction automatically adjusts the Gain parameter value within set limits until a target brightnessvalue for the pixel data is reached.The gain auto function can be operated in the Once and Continuous modes of operation.The gain auto function and the exposure auto function can be used at the same time. In this case,however, you must also set the Auto Function Profile feature.For more information about setting the gain manually, see Section 11.2 on page 83. the Auto Function Profile feature, see Section 11.11.6 on page 119.Lower and Upper LimitsThe limits within which the camera will adjust the Gain parameter are defined by theAutoGainUpperLimit and the AutoGainLowerLimit parameters.Example: You set AutoGainLowerLimit to 2 and AutoGainUpperLimit to 6. During automaticadjustments, the Gain parameter value will never be lower than 2 and never be higher than 6.Target ValueWhen the gain auto function is enabled, it adjusts the gain until a target brightness, i.e., an averagegray value, is reached. You can set the target value using the AutoTargetBrightness parameter.The parameter value range refers to the theoretically maximum available range of gray values forthe set pixel format.Example: If an 8-bit pixel format is set, the maximum gray value is 256. Therefore, a parametervalue of 0.5 corresponds to a gray value of 128.The target value calculation does not include gamma correction. Depending onthe gamma correction value set, images output by the camera may have asignificantly lower or higher average gray value than indicated by theAutoTargetBrightness parameter value.For example, if you set the pixel format to YCbCr422 and AutoTargetBrightness to0.5, images output by the camera will have a higher average gray value than 128.This is because an additional sRGB gamma correction value is applied after thetarget value calculation has been performed.For more information about gamma correction, see Section 11.4 on page 85.
