Abstract

A technique of source encoding of an extended incoherent source for image subtraction is presented. The source-encoding constraints are obtained from the coherence requirement for the subtraction operation. Source encoding increases the available light power for the processing operation, as a small incoherent source is no longer required. An experimental result obtained with the encoded incoherent-source technique is given. A similar result obtained by using a coherent technique is included for comparison.

© 1981 Optical Society of America

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