Abstract
We present a method for radiometric calibration of cameras from a single image that contains a human face. This
technique takes advantage of a low-rank property that exists
among certain skin albedo gradients because of the pigments within the skin. This property becomes distorted in
images that are captured with a non-linear camera response
function, and we perform radiometric calibration by solving for the inverse response function that best restores this
low-rank property in an image. Although this work makes
use of the color properties of skin pigments, we show that
this calibration is unaffected by the color of scene illumination or the sensitivities of the camera’s color filters. Our
experiments validate this approach on a variety of images
containing human faces, and show that faces can provide
an important source of calibration data in images where
existing radiometric calibration techniques perform poorly