A digital image signal processing apparatus includes a digital signal processing unit, a plurality of display units, and a display driving unit. The digital signal processing unit provides a plurality of pieces of image data that respectively form a plurality of images. The plurality of display units display images corresponding respectively to the plurality of pieces of the image data. The display driving unit includes a display memory that records the plurality of pieces of image data, a recording address unit that controls the plurality of pieces of image data to be recorded in the display memory, and a plurality of display address units that respectively read the recorded pieces of image data and provide the recorded pieces of image data respectively to the display units. Accordingly, a photographer may directly display a desired image to a photographed person as a high-quality filtered image without a separate selection operation.