1. A method usable with an imager type automatic data collection device, the method comprising: obtaining a first image of a display screen of an electronic display device, the first image including noise and an image of a target machine-readable symbol that is affected by the noise; obtaining a second image of the display screen, the second image having the image of the target machine-readable symbol absent therefrom and including the noise; and subtracting the second image from the first image to substantially remove the noise and to obtain a third image that includes a resulting improved image of the target machine-readable symbol.