search

korbinian90 / ROMEO

Executables for ROMEO unwrapping for Linux, Windows and Mac OSX
40 stars 0 forks source link

question about units #11

Open ken-sakaie opened 2 years ago

ken-sakaie commented 2 years ago

What units are the unwrapped phase in? I sent in phase images with values ranging from 0 to 4095. Output values ranged from -169.820160 to 195.847427. I'm guessing that the range is some multiple of pi radians, but I would appreciate some specificity. Apologies in advance if the answer is in the documentation and I was too lazy to find it.

korbinian90 commented 2 years ago

Thanks for asking!

ROMEO interprets the input phase as a wrapped phase being in the range [-pi;pi]. That means for your dataset it is rescaled [0;4095] -> [-pi;pi] and is then in radians [rad]. This rescaled image is unwrapped and the output is also in [rad].

The output range (-169.820160 to 195.847427) is arbitrary, as it is probably given by the unwrapping of noise voxels. 170 is about 50 wraps (which usually only occurs for noise).

Does this explanation help? Please keep this issue open, as I'm also updating the README (when I have more time)

ken-sakaie commented 1 year ago

Korbinian,

To clarify, is it ok for the input to ROMEO have a range from 0 through 4095? Alternatively, should I manually scale the phase maps to -pi through pi before giving it to ROMEO?

Thanks, Ken

From: Korbinian Eckstein @.> Sent: Wednesday, August 17, 2022 10:43 PM To: korbinian90/ROMEO @.> Cc: Sakaie, Ken @.>; Author @.> Subject: [BULK][EXT] Re: [korbinian90/ROMEO] question about units (Issue #11)

CAUTION CYBER RISK: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender, expected to receive this content and trust that it’s safe. If you determine that the email isn’t from a trusted source, you can delete the email, submit it via the BlueFish button in Outlook for investigation or forward the email as an attachment to @.**@.?subject=Report%20a%20Suspicious%20Email> if you don’t have the Bluefish button or are on a mobile device.

Thanks for asking!

ROMEO interprets the input phase as a wrapped phase being in the range [-pi;pi]. That means for your dataset it is rescaled [0;4095] -> [-pi;pi] and is then in radians [rad]. This rescaled image is unwrapped and the output is also in [rad].

The output range (-169.820160 to 195.847427) is arbitrary, as it is probably given by the unwrapping of noise voxels. 170 is about 50 wraps (which usually only occurs for noise).

Does this explanation help? Please keep this issue open, as I'm also updating the README (when I have more time)

— Reply to this email directly, view it on GitHubhttps://github.com/korbinian90/ROMEO/issues/11#issuecomment-1218950958, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AAGYOUBIDDCD6RL3BE6Y36LVZWPO5ANCNFSM56WHSH3Q. You are receiving this because you authored the thread.Message ID: @.***>

Please consider the environment before printing this e-mail

Cleveland Clinic is currently ranked as the No. 2 hospital in the country by U.S. News & World Report (2017-2018). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you.

korbinian90 commented 1 year ago

Yes, the range 0 through 4095 is a valid input range for ROMEO, manual scaling is not necessary. Did you encounter problems with the unwrapping?

ken-sakaie commented 1 year ago

Korbinian,

Thanks for the reply. The unwrapping did work! We're quite happy with the results from romeo in general.

Thanks, Ken

From: Korbinian Eckstein @.> Sent: Tuesday, October 11, 2022 5:02 AM To: korbinian90/ROMEO @.> Cc: Sakaie, Ken @.>; Author @.> Subject: [BULK][EXT] Re: [korbinian90/ROMEO] question about units (Issue #11)

CAUTION CYBER RISK: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender, expected to receive this content and trust that it’s safe. If you determine that the email isn’t from a trusted source, you can delete the email, submit it via the BlueFish button in Outlook for investigation or forward the email as an attachment to @.**@.?subject=Report%20a%20Suspicious%20Email> if you don’t have the Bluefish button or are on a mobile device.

Yes, the range 0 through 4095 is a valid input range for ROMEO, manual scaling is not necessary. Did you encounter problems with the unwrapping?

— Reply to this email directly, view it on GitHubhttps://github.com/korbinian90/ROMEO/issues/11#issuecomment-1274354800, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AAGYOUH3WCU3L75CYZK3DALWCUULRANCNFSM56WHSH3Q. You are receiving this because you authored the thread.Message ID: @.***>

Please consider the environment before printing this e-mail

Cleveland Clinic is currently ranked as the No. 2 hospital in the country by U.S. News & World Report (2017-2018). Visit us online at http://www.clevelandclinic.org for a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you.