DEGRADATION INFORMATION RESTORING METHOD AND DEVICE

摘要

A technique of correctly restoring the distribution of original information by performing iterative computation using only the distribution of degradation information. The method of the invention restores original information from only degradation information. In this method, the distributions of the degradation information and the original information are assumed as distributions of probability density function, and the transfer function of a transfer system is assumed as the probability density function of a conditional probability. Deduction of the distribution of the maximum likelihood original information with respect to the distribution of the degradation information and deduction of the distribution of the transfer function are alternatively carried out by iterative computation based on the Bayes theory, and the original information is finally restored.