1. An apparatus for blurring a background of an image in a digital image processing device, the apparatus comprising: a digital signal processor for blurring an image generated by a difference in brightness between a first image generated before a shutter input signal is received and a second image generated with the flash being on after the shutter input signal is received and for combining a third image generated when the flash is turned off after the shutter input signal is received, to the blurred image.