levels of SNR

Question

levels of SNR

chenyzzz opened this issue a year ago · comments

Hello! Great job!
I would like to ask you how to use three different levels of signal-to-noise ratio (92dB, 96dB, 101dB) to obtain pictures?
As you said in paper: To test the performance of the model at different speckle levels, the data is acquired with three different levels of signal-to-noise ratio (92dB, 96dB, 101dB).
I want to use my own dataset, but I don't know how to do this step, can you give some advice? Thank you very much!

Dewei Hu · Answer 1 · Wed May 31 2023 12:47:43 GMT+0800 (China Standard Time)

Hi there, Since we are using our in-house data, the speckle noise level is modulated by attenuating the input signal of the OCT system during acquisition. If you have clean data, you can probably add speckle noise yourself to create noisy dataset. Dewei

…

________________________________ From: Chenyunzhu ***@***.***> Sent: Tuesday, May 30, 2023 10:22 PM To: DeweiHu/OCT_DDPM ***@***.***> Cc: Subscribed ***@***.***> Subject: [DeweiHu/OCT_DDPM] levels of SNR (Issue #7) Hello! Great job! I would like to ask you how to use three different levels of signal-to-noise ratio (92dB, 96dB, 101dB) to obtain pictures? As you said in paper: To test the performance of the model at different speckle levels, the data is acquired with three different levels of signal-to-noise ratio (92dB, 96dB, 101dB). I want to use my own dataset, but I don't know how to do this step, can you give some advice? Thank you very much! — Reply to this email directly, view it on GitHub<#7>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AL6WZQAWRRFWT5P6XAVEJ7DXI22P3ANCNFSM6AAAAAAYU2V4TE>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

Chenyunzhu · Answer 2 · Thu Jun 01 2023 10:37:35 GMT+0800 (China Standard Time)

Thank you for your reply! Please forgive me for having too many questions
Is it possible to add some noise (gaussian noise, salt and pepper noise, speckle noise) to my own dataset and then use your method to denoise? Are there any requirements for the type of these noises? Is it just added in normally?
Thanks again for your reply! !

Hi there, Since we are using our in-house data, the speckle noise level is modulated by attenuating the input signal of the OCT system during acquisition. If you have clean data, you can probably add speckle noise yourself to create noisy dataset. Dewei
…
________________________________ From: Chenyunzhu @.> Sent: Tuesday, May 30, 2023 10:22 PM To: DeweiHu/OCT_DDPM @.> Cc: Subscribed @.> Subject: [DeweiHu/OCT_DDPM] levels of SNR (Issue #7) Hello! Great job! I would like to ask you how to use three different levels of signal-to-noise ratio (92dB, 96dB, 101dB) to obtain pictures? As you said in paper: To test the performance of the model at different speckle levels, the data is acquired with three different levels of signal-to-noise ratio (92dB, 96dB, 101dB). I want to use my own dataset, but I don't know how to do this step, can you give some advice? Thank you very much! — Reply to this email directly, view it on GitHub<#7>, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AL6WZQAWRRFWT5P6XAVEJ7DXI22P3ANCNFSM6AAAAAAYU2V4TE. You are receiving this because you are subscribed to this thread.Message ID: @.>

Dewei Hu · Answer 3 · Fri Jun 02 2023 02:52:17 GMT+0800 (China Standard Time)

You can certainly do that to try out the method. Add noise then denoise is a method often used in ultrasound denoising because the clean reference is not accessible. But it is not a common practice for OCT since people managed to get the ground truth via averaging repeated b-scans. But you still need to do a literature review for this. Dewei

…

________________________________ From: Chenyunzhu ***@***.***> Sent: Wednesday, May 31, 2023 9:37 PM To: DeweiHu/OCT_DDPM ***@***.***> Cc: Hu, Dewei ***@***.***>; Comment ***@***.***> Subject: Re: [DeweiHu/OCT_DDPM] levels of SNR (Issue #7) Thank you for your reply! Please forgive me for having too many questions Is it possible to add some noise (gaussian noise, salt and pepper noise, speckle noise) to my own dataset and then use your method to denoise? Are there any requirements for the type of these noises? Is it just added in normally? Thanks again for your reply! ! Hi there, Since we are using our in-house data, the speckle noise level is modulated by attenuating the input signal of the OCT system during acquisition. If you have clean data, you can probably add speckle noise yourself to create noisy dataset. Dewei …

________________________________ From: Chenyunzhu @.> Sent: Tuesday, May 30, 2023 10:22 PM To: DeweiHu/OCT_DDPM @.> Cc: Subscribed @.> Subject: [DeweiHu/OCT_DDPM] levels of SNR (Issue #7<#7>) Hello! Great job! I would like to ask you how to use three different levels of signal-to-noise ratio (92dB, 96dB, 101dB) to obtain pictures? As you said in paper: To test the performance of the model at different speckle levels, the data is acquired with three different levels of signal-to-noise ratio (92dB, 96dB, 101dB). I want to use my own dataset, but I don't know how to do this step, can you give some advice? Thank you very much! — Reply to this email directly, view it on GitHub<#7<#7>>, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AL6WZQAWRRFWT5P6XAVEJ7DXI22P3ANCNFSM6AAAAAAYU2V4TE. You are receiving this because you are subscribed to this thread.Message ID: @.> — Reply to this email directly, view it on GitHub<#7 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AL6WZQHFUEZGPX2T7GWTW5DXI757TANCNFSM6AAAAAAYU2V4TE>. You are receiving this because you commented.Message ID: ***@***.***>

Chenyunzhu · Answer 4 · Fri Jun 02 2023 10:06:21 GMT+0800 (China Standard Time)

I get it! I'll try to do it. Thank you.