1. A method of performing a conversion of a skin color of an input image into a desired color implemented by an image device comprising a processor having computing device-executable instructions, the method comprising: detecting a face area from the input image; extracting the face area from the input image; detecting a first skin area from the input image; extracting the first skin area from the input image; judging a common area between the face area and the first skin area having a common overlap as a face; extracting a second skin area, which is the same as the first skin area or which is different from the first skin area, from the input image based on a first skin color in the common area; and converting a second skin color of the second skin area into an image-adaptive skin color.