Autofocus for minimum entropy through multi-dimensional...

Details Autofocus for minimum entropy through multi-dimensional... Autofocus for minimum entropy through multi-dimensional...

2008-06-09

2010-06-01

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

C342S196000, C342S192000, C342S02500R

Reexamination Certificate

active

07728757

ABSTRACT:
A computer implemented method, apparatus, and computer usable program code for focusing an image. In one advantageous embodiment, a method is used to focus an image. Optimization is performed to identify an array of coefficients for a polynomial representing a phase correction in a manner that minimizes an entropy value generated by an entropy calculation for the image. The array of coefficients is applied to the polynomial to obtain a desired phase correction. A phase error in the image is corrected using the desired phase correction to focus the image.

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