Abstract
The human visual system maintains the perception of colors of an object across various light sources. Similarly, current digital cameras feature an auto white balance function, which estimates the illuminant color and corrects the color of a photograph as if the photograph was taken under a certain light source. The main subject in a photograph is often a person’s face, which could be used to estimate the illuminant color. However, such estimation is adversely affected by differences in facial colors among individuals. The present paper proposes an auto white balance algorithm based on a pigmentation separation method that separates the human skin color image into the components of melanin, hemoglobin and shading. Pigment densities have a uniform property within the same race that can be calculated from the components of melanin and hemoglobin in the face. We, thus, propose a method that uses the subject’s facial color in an image and is unaffected by individual differences in facial color among Japanese people.
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Tanaka, S., Kakinuma, A., Kamijo, N. et al. Auto white balance method using a pigmentation separation technique for human skin color. Opt Rev 24, 17–26 (2017). https://doi.org/10.1007/s10043-016-0290-y
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DOI: https://doi.org/10.1007/s10043-016-0290-y