According to examples of the present disclosure, a method and apparatus for automatic white balance may be provided. A white region for performing automatic white balance may be obtained by a front end device of a video monitoring system. At least one cluster may be generated by clustering statistical points within the white region of a to-be-detected image by the front end device. The cluster may be determined as a target cluster and statistical points within the target cluster may be determined as white points by the front end device when the number of statistical points within the cluster is greater than a preset threshold. And a white balance gain of the to-be-detected image may be determined by the front end device based on the target cluster.