  An experimental method for suppression of DC term in the reconstructed images
from Fresnel digital holograms is presented. In this method, two holograms for
the same object are captured sequentially and subtracted. Since these two
holograms are captured at different moments, they are slightly different from
each other for fluctuations of noises. The DC term is suppressed in the image
reconstructed from the subtraction hologram, while the two virtual and real
images are successfully reconstructed. This method can be potentially used for
the improvement of image quality reconstructed from Fresnel digital holograms.
