Demodulation and phase estimation of two-dimensional patterns

Details Demodulation and phase estimation of two-dimensional patterns Demodulation and phase estimation of two-dimensional patterns

2006-01-19

2008-10-28

Carter, Aaron W (Department: 2624)

Image analysis

Image compression or coding

Transform coding

C382S280000, C348S638000, C358S469000

Reexamination Certificate

active

07444032

ABSTRACT:
A method (100) of demodulating a real two-dimensional pattern (110) is disclosed. The method (100) estimates (120, 130) a quadrature two-dimensional pattern from the real two-dimensional pattern (110) using a smooth phase only transform having an anti-symmetric phase, such as a spiral phase filter (140). A demodulated image is created by combining (180) the real two-dimensional pattern (110) and the estimated quadrature two-dimensional pattern.

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