We demonstrate a simple all-optical realization of programmable edge enhancement and edge-enhanced correlation using novel photorefractive polymers. We show that the higher non-Bragg order in a two-beam coupling scheme contains the edge enhancement of the object when placed in the path of one of the incident beams. Also, this arrangement provides a scheme for writing joint transform correlation dynamic holograms, which can be read by a third beam. The correlation is edge enhanced, and the correlation peak increases with the applied bias voltage. Numerical results without and with beam fanning are presented. Theoretical predictions are reconciled with experimental results.
© 2000 Optical Society of America
(090.2900) Holography : Optical storage materials
(100.2980) Image processing : Image enhancement
(100.4550) Image processing : Correlators
(190.5330) Nonlinear optics : Photorefractive optics
(190.7070) Nonlinear optics : Two-wave mixing
Partha P. Banerjee, Esam Gad, Tracy Hudson, Deanna McMillen, Hossin Abdeldayem, Donald Frazier, and Kenji Matsushita, "Edge Enhancement and Edge-Enhanced Correlation with Photorefractive Polymers," Appl. Opt. 39, 5337-5346 (2000)