White balance setting method

摘要

Disclosed is a white balance regulating device, including a cut-off value adjusting portion (210) for adjusting and outputting a cut-off value of an analogue image signal which is input as a first pattern; an A/D converter (220) for converting the analogue image signal, in which the cut-off value is adjusted, into a digital image signal; a detecting portion (250) for detecting a least significant bit of each tristimulus value of the digital image signal; a controlling portion (260) for upwardly regulating a level of a variable register of the cut-off value adjusting portion (210) from a level corresponding to a preset first initial cut-off value until the least significant bit becomes different from the first initial cut-off value and setting the level of the variable register just before the least significant bit becomes different from the first initial cut-off value as a first cut-off value; and a storing portion (270) for storing the first cut-off value.