An image processing device is provided. An object separation unit of the image processing device can separate an object area and a background area from each other by using one or more of a color image and a depth image connected to the color image. A contrast calculation unit of the image processing device calculates a contrast between the object area and the background area. A depth adjustment unit adjusts the depth of the depth image by using the contrast. [Reference numerals] (110) Object separation unit; (120) Contrast calculation unit; (130) Depth adjustment unit
