phase unwrapping

[sree99]

Can anyone  explain how to extract phase information from a complex image, plotting it in 3D and unwrap it. I couldn't find any module for phase unwrapping like the unwrap code in matlab

[Klemen]

Hello,

you need to perform FFT on the image and calculate the phase using the imaginary and real part. The phase is calculated as atan2(Im,Re).

Then unwrap the phase (see a similar thread here: http://forums.ni.com/t5/LabVIEW/How-to-unwrap-a-2D-phase-map/td-p/2477554).

Best regards,

K

[sree99]

The link is not working.

[Klemen]

Hello,

sorry, the ".)" at the end are not valid.

http://forums.ni.com/t5/LabVIEW/How-to-unwrap-a-2D-phase-map/td-p/2477554

Best regards,

K

[sree99]

Thank you Klemen... I will update the progress soon. After some working I used Comlexplane to image for retreiving the phase image. Is the resulting phase information is similar to atan2(Re Im).