Device for and method of correcting white balance of image

An image processing method comprising:

• estimating a light source color temperature based on image data of an image captured by a camera;
• identifying a target coordinate on a color space based on the light source color temperature;
• identifying a capture coordinate on the color space based on the image;
• identifying a chrominance allowable range based on the target coordinate;
• obtaining a white balance evaluation value based on a first distance between the target coordinate and the chrominance allowable range and a second distance between the capture coordinate and the chrominance allowable range;
• and
• performing a white balance correction on the image based on the white balance evaluation value,
• wherein the identifying of the chrominance allowable range comprises identifying, based on the target coordinate, a distance in an amber direction, a distance in a magenta direction, a distance in a blue direction, and a distance in a light green direction.

A non-transitory computer-readable storage medium having stored therein a computer program for executing an image processing method, when executed by a processor, the processor is configured to:

• estimate a light source color temperature based on image data of an image captured by a camera;
• identify a target coordinate on a color space based on the light source color temperature;
• identify a capture coordinate on the color space based on the image;
• identify a chrominance allowable range based on the target coordinate;
• obtain a white balance evaluation value based on a first distance between the target coordinate and the chrominance allowable range and a second distance between the capture coordinate and the chrominance allowable range;
• and
• perform a white balance correction on the image based on the white balance evaluation value,
• wherein the identifying of the chrominance allowable range comprises identifying, based on the target coordinate, a distance in an amber direction, a distance in a magenta direction, a distance in a blue direction, and a distance in a light green direction.