Patent ID: 7978230

Claim:
An electronic device comprising: a flash source; a camera module with an image scanning element and a pre-determined white-balance routine that includes an initial limit region of a chromaticity chart, the initial limit region of the chromaticity chart overlying a portion of a blackbody radiation curve, the flash source having an optical spectrum lying outside the initial limit region of the chromaticity chart; a storage containing a white-balance patch and color coordinates of points on the chromaticity chart; and a processor operable to retrieve the white-balance patch from the storage and to provide the white-balance patch to the camera module, the camera module being operable to modify the initial limit region of the white-balance routine in accordance with the white-balance patch to obtain a modified limit region, the modified limit region including at least a portion of the flash source optical spectrum, the processor also being operable to retrieve the color coordinates of a first point of the chromaticity chart and to provide the color coordinates of the first point to the camera module, the first point being outside the initial limit region and inside the modified limit region, the first point to be used by the white-balance routine to define a reference white region, the reference white region excluding any portion of the black body radiation curve, the processor being further operable to energize the flash source and to signal the camera module to activate the image scanning element.