METHODS AND DEVICES FOR GRAY POINT ESTIMATION IN DIGITAL IMAGES

摘要

A device and a method for estimating gray point in digital image frames are disclosed. The method includes obtaining a digital image frame and determining red-green-blue (RGB) values for each pixel in at least a part of the digital image frame. The method further includes calculating a first component value and a second component value in a pre-determined color space for said each pixel, where the first component value and the second component value are calculated from the RGB values for said each pixel. The method further includes determining a two-dimensional (2-D) distribution based on the first component value and the second component value for said each pixel. Thereafter, the method includes identifying one or more saturated color clusters in the 2-D distribution, and analyzing the one or more saturated color clusters to estimate a gray point for at least the part of the digital image frame.

主权项

1. A method, comprising:
obtaining a digital image frame; determining red-green-blue (RGB) values for each pixel in at least a part of the digital image frame; calculating a first component value and a second component value in a pre-determined color space for said each pixel, the first component value and the second component value calculated from the RGB values for said each pixel; determining a two-dimensional (2-D) distribution based on the first component value and the second component value for said each pixel; identifying one or more saturated color clusters in the 2-D distribution; and analyzing the one or more saturated color clusters to estimate a gray point for at least the part of the digital image frame.