Patent ID: 7929025

Claim:
An automatic white balance (AWB) control system comprising: an image capturing module for capturing a plurality of images; a storage module for storing at least one threshold value; an image parameter calculating module for calculating a distance value from a coordinate related to the image to a reference point in a color space coordinate system for each image, and obtaining a determining parameter from the distance values; a white balance module for executing an automatic white balance operation; and a control module for comparing the determining parameter and the threshold value, wherein if the determining parameter is greater than the threshold value, then the control module drives the white balance module to execute the automatic white balance operation, and the control module counts the occurrence frequency for which the determining parameter is smaller than the threshold value within a predetermined interval, and adjusting the threshold value based on the occurrence frequency; wherein the control module adjusts the threshold value to a smaller value if the occurrence frequency is greater than a first value; and the control module adjusts the threshold value to a larger value if the occurrence frequency is smaller than a second value, and the first value is greater than the second value.