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An image processing system for beautifying human face images is proposed using interactive evolutionary computing. Authors proposed before a nonlinear digital filter bank system which removes undesirable skin components, such as wrinkles and spots, from human face images to make the face look beautified. The system was so effective, but it requires a lot of parameters to be adjusted, which were set by trial and error. In this paper, interactive evolutionary computing (IEC) is newly introduced into the nonlinear digital filter bank to set the values of the parameters so that the output face image be highly evaluated on the basis of subjective criteria. The new face image processing system is verified to be effective in processing some actual face images.