1. An immersive sensation enhancement system, the system comprising: a foreground image identification unit to identify a foreground image for each frame of an input image; a foreground image characteristic extraction unit to extract a characteristic of the foreground image, among a plurality of characteristics; a contrast threshold identification unit to identify a contrast threshold, based on the extracted characteristic of the foreground image; and an immersive sensation enhancement processing unit to process an immersive sensation enhancement of the input image, such that a contrast of the foreground image is enhanced using the identified contrast threshold and the extracted characteristic of the foreground image, wherein the contrast threshold varies differently with respect to each of the plurality of characteristics of the foreground image.