A straightforward method that has been used to spoof an iris sensor is based on a high-quality
photograph of the eye [14]. In one study [34], three different commercial iris sensors were examined
for their ability to discriminate against such photographic spoofs. Images of an iris were generated
from the data collected from one of the three sensors as well as from an image generated by a digital microscope. Both of these images were printed on mat paper using a standard laser jet
printer. After the pupil regions of the images were cut out, each image was presented to each of the
tested sensors in both enrollment and verification modes. Although the rate of spoof acceptance
differed considerably by device and condition (enroll or verify, image from microscope or from an
iris sensor), acceptance levels were significantly large and approached 100% under certain
conditions.