The invention relates to an automatic white balance detection
system which adopts unique composition. Characteristics of a camera and characteristics of a
black body curve are combined, and an operation of finding out white / gray point-achromatic regions is adopted to replace an existing region
algorithm, weight
algorithm and the like. Two regions of a warm color
light source and a cold color
light source are adopted according to
light source characteristics; information of R / G and B / G, which is calculated in a changing mode by a variable image partitioning technology, is used as decision elements; a non-closed adjustable mode is adopted for a region of reference points, and a variable maximum and minimum approximate curve mode is determined. According to a detection
color temperature range /
detector color temperature accuracy, each region is subjected to
color temperature calculation;
colored regions in color temperature regions are removed and
colored regions in brightness are removed, the number of white / gray regions obtained after the
colored regions are removed is finally determined, and R and B gains and color temperatures of the determined white / gray achromatic regions are calculated. According to the automatic white balance detection
system disclosed by the invention, the problem of influence of light
source spectrum characteristics and characteristics of an
image sensor, characteristics of an IRCF (
Infrared Ray Cut Filter) and characteristics of a lens in a
camera module of the
image sensor is well solved, and accuracy of white balance is improved.