M. Misono et al., NOISE-ENHANCED TRANSMISSION OF INFORMATION IN A BISTABLE SYSTEM, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 58(5), 1998, pp. 5602-5607
Stochastic resonance (SR) in a bistable system with a binary input sig
nal is studied by numerical simulation. The mutual information (MI) is
used as a measure of information. We show that MI shows the resonance
peculiar to SR and that the output MI of the bistable system can exce
ed the input one, that is, MI can have gain. The dependence of the res
onance signal and the gain of MI on the noise cutoff frequency is stud
ied and it is shown that the noise with large cutoff frequency is favo
rable for SR and for the gain of MI. To show the characteristics and t
he benefits of this type of SR and the gain of MI, the behavior of SR
in the bistable system for image data is simulated. The simulation res
ults show that this system can improve the visibility of images. [S106
3-651X(98)00311-0].