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Phase Unwrapping Algorithms? [message #7456]

Tue, 19 November 1996 00:00

wsryu
Messages: 4
Registered: September 1996

Junior Member

Hello:

I am interesting in phase unwrapping algorithms which can handle noisy
data. I understand this to be a common procedure when doing FFT analysis
of interference patterns, and was wondering if anyone has implemented such
routines in IDL.

For example:

Let's say we have a 2D matrix of complex data a+bi and would like to
extract the phase value. A simple way would be to take arctan (b/a) but a
problem exists because arctan is modulo 2PI. The data often gets
"wrapped."

Even if not implemented in IDL, I would be curious to hear about peoples
favorite methods.

Sincerely,

-will ryu

--
William Ryu
wsryu@husc.harvard.edu / Harvard University Biophysics / Paradise-Hell
ryu@risvax.rowland.org / Rowland Institute for Science, Inc.

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Phase Unwrapping Algorithms?

By: wsryu on Tue, 19 November 1996 00:00

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