Patent ID: 8994848
Filing Date: 2015-03-31
Classification: H04N

Abstract:
1. A method comprising: obtaining, with an image processing apparatus, a white point that corresponds to an image captured by a camera with only the natural light as a light source; obtaining, with the image processing apparatus, a white point that corresponds to an image captured by the camera with only a high efficiency artificial light as a light source; determining, with a spatial sensor of the image processing apparatus, a ratio of an intensity of near infrared light in natural light for a pixel to an intensity of high efficiency artificial light for the pixel within an image captured by a camera under mixed illumination of the natural light and the high efficiency artificial light; and determining, with the image processing apparatus, a white point for the pixel in the image under mixed illumination based on the ratio of the intensity of near infrared light to the intensity of high efficiency artificial light for the pixel in the image, the white point for only the natural light, and the white point for only the high efficiency artificial light.