Abstract

The transmission properties of bacteriorhodopsin film spatial light modulators are used to perform nonlinear optical image processing operations on images with multiplicative noise. A logarithmic amplitude transmission characteristic of the film permits the real-time optical conversion of multiplicative noise to additive noise, which is then linearly filtered out in the Fourier plane of the transformed image. We present experimental results for different image and noise situations, including deterministic noise and speckle.

© 1995 Optical Society of America