Patent ID: 8559708

Claim:
A method performed by a software process executing on a computer system, the method comprising: obtaining a digital image comprising a plurality of pixels encoded in a YUV color space, each pixel having a luma component of value Y, a blue color-difference component of value U and a red color-difference component of value V; for a specified pixel having values of the blue color-difference and red color-difference components that correspond to a point (U, V) in a U-V color plane of the YUV color space, calculating whether U is less than a first threshold and V is greater than a second threshold; determining whether the specified pixel potentially depicts an orange hue depending on a result of the calculation, and calculating a chroma value for the specified pixel by determining a distance of the point (U,V) from the origin on the U-V color plane, wherein the distance of the point (U,V) from the origin on the U-V color plane is calculated as an average of U and V.