A new method called gradual and random binarization to binarize gray-scale holograms, based on an iterative algorithm, is proposed. The binarization process is performed gradually, and the pixels to be binarized are chosen randomly. Errors caused by this operation are spatially diffused. A comparison with other established methods based on error diffusion, direct binary search, and iterative stepwise quantization shows that the gradual and random binarization method achieves a very good compromise between computational complexity and reconstruction quality. Optical reconstructions are presented.
© 1995 Optical Society of America
Original Manuscript: September 6, 1994
Revised Manuscript: April 26, 1995
Published: September 10, 1995
Eryi Zhang, Steffen Noehte, Christoph H. Dietrich, and Reinhard Männer, "Gradual and random binarization of gray-scale holograms," Appl. Opt. 34, 5987-5995 (1995)