Patent ID: 7899254
Filing Date: 2011-03-01
Classification: G06T

Abstract:
1. A method for restoring original information from degraded information comprising: identifying a distribution of degraded information represented by a complex probability density function; acquiring an optical transfer function for a transfer in a transfer system from original information to the degraded information as a function in the frequency space, the optical transfer function being based on a Fourier transform of characteristics of the transfer system, the optical transfer function including a phase characteristic of the transfer system; identifying an initial estimated distribution of the original information represented by a complex probability density function; (1) acquiring a first function by applying a Fourier transform to the estimated distribution of the original information; (2) acquiring a second function by multiplying the first function by the optical transfer function; (3) acquiring a third function by applying an inverse Fourier transform to the second function; (4) acquiring a fourth function by dividing the distribution of the degraded information by the third function; (5) acquiring a fifth function by applying a Fourier transform to the fourth function; (6) acquiring a sixth function by multiplying the fifth function by a phase-reverse function of the optical transfer function; (7) acquiring a seventh function by applying an inverse Fourier transform to the sixth function; (8) acquiring a next estimated distribution of the original information by multiplying the estimated distribution of the original information by the seventh function; replacing the estimated distribution of the original information with the next estimated distribution of the original information, and repeating said steps (1) to (8); and outputting restored original information based on the estimated distribution of the original information.