Image enhancement in longwave holography by electronic differentiation |
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Authors: | John D Blackwell NH Farhat |
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Institution: | Moore School of Electrical Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19174, USA |
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Abstract: | In scanned longwave holography the hologram data is available in the form of an electronic signal which lends itself to convenient processing. In this paper the effects of electronic differentiation of the hologram data in Fresnel holograms are studied. We present both theoretical and experimental results which indicate that this processing technique emphasizes the detail and edges of the object. |
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