Computer implemented method for temporally stabilizing white point information in an auto white balance process, a data processing apparatus, a computer program product, and a computer-readable storage medium

A data processing apparatus, comprising:

• one or more processors;
• and
• a non-transitory computer-readable storage medium storing instructions executable by the one or more processors, wherein when the one or more processors are configured to:
• receive lux level information, AWB statistics comprising image pixel data of a frame from a sequence of frames representing a scene, and input WP information obtained from the AWB process;
• generate a confidence value for the input WP information;
• determine a threshold value based on a major colour count of the frame and the lux level information;
• set a binary WP update state to a locked state when the confidence value is below the threshold value and to an unlocked state when the confidence value is above the threshold value;
• and
• generate, when the binary WP update state is locked, final WP information from WP information obtained from a previous frame from said sequence and, when the binary WP update state is unlocked, generate final WP information from the input WP information.

A non-transitory computer-readable storage medium storing a plurality of programs for execution by a computing device having one or more processors, wherein the plurality of programs, when executed by the one or more processors, cause the computing device to perform acts comprising:

• receiving lux level information, AWB statistics comprising image pixel data of a frame from a sequence of frames representing a scene, and input WP information obtained from the AWB process;
• generating a confidence value for the input WP information;
• determining a threshold value based on a major colour count of the frame and the lux level information;
• setting a binary WP update state to a locked state when the confidence value is below the threshold value and to an unlocked state when the confidence value is above the threshold value;
• and
• generating, when the binary WP update state is locked, final WP information from WP information obtained from a previous frame from said sequence and, when the binary WP update state is unlocked, generating final WP information from the input WP information.