Two image-coding capabilities associated with far-field holograms are analytically and experimentally evaluated. It is demonstrated that preprocessed information concerning the shape of a small object can be efficiently coded into the fringe structure associated with a far-field hologram. In addition, the resultant record has a smaller bandwidth than the original object, and this reduces the resolution requirements when the hologram is used as the input to an information processing system.
© 1978 Optical Society of America
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