Jump to content
Sign in to follow this  
dmstraker

AP: Extreme denoising/sharpening

Recommended Posts

Here's an example of something I just did to balance that tricky situation of a noisy picture where you want to remove noise but preserve detail.

Here's the original image:

angel1.thumb.png.93eb4586289b78f2eacef4de58bdfa05.png

...and here's what happens when you try to denoise it (up to 450% extreme) .. note the loss of detail.

angel1a.thumb.png.b9b36143db36678553e146946fe15711.png

So...

1. Start with Filter/Frequency separation. Allow a fair amount of noise into HF side. (Note this is the only destructive action, so be prepared to return to re-do this as needed).

2. Turn off HF layer so you can see the LF layer alone. This still has noise.

3. Add Gaussian Blur to LF layer to further reduce noise. I used 2px.

4. Show HF layer, turning off LF

5. Add Denoise to HF layer. Click 'Extreme' and increase luminance denoise until noise is much reduced. I used 109%.

6. Add High Pass filter to HF layer. I used 100px and Blend Mode of Linear Light.

7. Re-enable LF layer to see final effect.

angel7.thumb.png.0381ce4740e10dd4661ba5a7c64e3b32.png

 

There may be even better ways to do this. Any suggestions?

 

 


Dave Straker

Cameras: Sony A7R2, RX100V

Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11"

Favourite word: Aha. For me and for others.

Share this post


Link to post
Share on other sites

Interesting approach, Dave, and not one I'd have thought of. On the other hand, I don't even understand Frequency Separation enough to begin to use it or even follow your description. More research to do, I guess :)

Still, to my eye, the final image has lost too much detail on the wings. Is there a way to do some masking to limit the amount of effects applied to them? Or a way to capture some of that detail and add it back in later?


-- Walt

Windows 10 Home, version 1909 (183623.476),
   Desktop: 16GB memory, Intel Core i7-6700K @ 4.00GHz, GeForce GTX 970
   Laptop:  8GB memory, Intel Core i7-3625QM @ 2.30GHz, Intel HD Graphics 4000 or NVIDIA GeForce GT 630M
Affinity Photo 1.8.3.641 and 1.8.4.650 Beta   / Affinity Designer 1.8.3.641 and 1.8.4.650 Beta  / Affinity Publisher 1.8.3.641 and 1.8.4.651 Beta.

Share this post


Link to post
Share on other sites
23 hours ago, walt.farrell said:

Interesting approach, Dave, and not one I'd have thought of. On the other hand, I don't even understand Frequency Separation enough to begin to use it or even follow your description. More research to do, I guess :)

Still, to my eye, the final image has lost too much detail on the wings. Is there a way to do some masking to limit the amount of effects applied to them? Or a way to capture some of that detail and add it back in later?

Probably is, Walt. I was just playing. I'll keep on twiddling...


Dave Straker

Cameras: Sony A7R2, RX100V

Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11"

Favourite word: Aha. For me and for others.

Share this post


Link to post
Share on other sites

Thanks, shotsty! I'll investigate Nik further!


Dave Straker

Cameras: Sony A7R2, RX100V

Computers: Win10: Chillblast i9 Custom + Philips 40in 4K & Benq 23in; Surface Pro 4 i5; iPad Pro 11"

Favourite word: Aha. For me and for others.

Share this post


Link to post
Share on other sites

I tried in  MacPhun's "Noiseless" app, it can install as a plugin for Photoshop app, but I have not been able to get it to work in  AP-Yet-.

I asked the MacPhun team for advise. awaiting answer at this point...

It works great, but I woud need to sharpen it a bit afterwards. I left the preview slider in the screenshot to show the difference.(edit: I used the most extreme settings possible)

Schermafbeelding 2018-01-12 om 09.06.47.png

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...

Important Information

Please note the Annual Company Closure section in the Terms of Use. These are the Terms of Use you will be asked to agree to if you join the forum. | Privacy Policy | Guidelines | We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.