1. An apparatus for generating an immersion, the apparatus comprising: a foreground/background separation unit to separate an input image into a foreground area and a background area using lightness information of the input image; an edge classification unit to classify the foreground area into an edge area and a non-edge area using the lightness information; a detail enhancement unit to enhance detail of the edge area of the foreground area; and a blurring performing unit to perform blurring of the non-edge area and the background area.