An age changing method based on the age of each facial part and environmental factors comprises the steps of: measuring the age of each facial part on the basis of an inputted facial image; designating personal environmental factors; applying an age changing model according to the age of each facial part and to the environmental factors so as to change the age of each facial part; restoring images changed according to each facial part; and synthesizing the restored images so as to generate an age-changed face. Therefore, realistic face changing is enabled on the basis of the measured age of each facial part and environmental factors.
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