Help with a roof tiled in Moire!

[DavidDoesAffinity]

I have tried to find a suitable FFT Denoise tutorial but other than the manual (yes I did RTFM) I cannot get anywhere. 

I was asked if if I could advise an Estate Agent who was putting together animated stills of a property and it was under attack from Moire patterns. Front aspect of property with tiled roof.
It has now turned into a "mission"!!!!
I was sent samples and was surprised that they had done nothing wrong. Both video size and data rate were good. The stills were razor sharp so my first port of call was to put the still in my old Photoshop and use the deinterlace filter. It certainly showed the problem whether Upper or Lower field was selected (in PS filter). (I don't think such a filter exists in A Photo).

I then turned to tools within my Video editing software to animate and was able and to tame the problem, using a cocktail of two filters.

However, as I was now on a "mission" I turned to Affinity to see what I could do with the original pic. The problem is the tiled roof so any filter I needed to "Paint" on the tiles only. At that stage I was out of AP skillset!!!!

The Deinterlaced file (PS filter) shows the inherent problem.

Thanks for any links, advice etc. As I said I can resolve in my video software but want to explore all other remedies.

[joe_l]

I am afraid the G'MIC plugin with its moire filter does not produce anything better than your second image.

[DavidDoesAffinity]

31 minutes ago, joe_l said:

I am afraid the G'MIC plugin with its moire filter does not produce anything better than your second image.

Arghhh! the second image is effectively a crop from the original. Well it was worth a try. 

Thanks for your advice.

[carl123]

Best I could in about 5 minutes, doubt I would want to spend much longer than that unless the Estate Agent was paying you for the work

Mainly FFT filter to get rid of the Moire then a couple of touch up layers

 

[DavidDoesAffinity]

Thanks Carl

When you added the FFT was it constrained just to the roof area (I assume on an adjustment layer) or does it find the bits it will do the biz on...like a particular video filter I sometimes need to use?

 

[Old Bruce]

I have had a fair amount of luck with a simple tenth of a pixel Gaussian blur applied to images and having that get rid of most if not all the Moire.

[smadell]

If the roof resists fixing, why not just go around the problem? This took me about 5-8 minutes, using a New Pixel Layer and the Clone brush. With more time, a better result would still be an easy solution.

[carl123]

3 hours ago, DavidDoesAffinity said:

When you added the FFT was it constrained just to the roof area

Yes, a quick copy of the roof area to a new layer then FFT on that layer only

[DavidDoesAffinity]

4 hours ago, smadell said:

If the roof resists fixing, why not just go around the problem? This took me about 5-8 minutes, using a New Pixel Layer and the Clone brush. With more time, a better result would still be an easy solution.

Which would be fine except that it is for an Estate Agent and has to be somewhere near not fake.

 

[DavidDoesAffinity]

6 hours ago, Old Bruce said:

I have had a fair amount of luck with a simple tenth of a pixel Gaussian blur applied to images and having that get rid of most if not all the Moire.

I will play some more. It is now a learning mission.

[Lisbon]

Hi @DavidDoesAffinity

I cannot guarantee that this will work. I would need a better quality image to be sure.
But you can try this.

Its a destructive workflow, so start by duplicating the background, name it "Emboss" and change the blending mode to Soft Light.
Next go to Filters > Colours > Emboss
This filter will shift the edges.

After masking you can try to reduce the opacity of the "Emboss" layer to keep the maximum amount of details.

[NotMyFault]

On 5/6/2022 at 1:05 PM, DavidDoesAffinity said:

in my old Photoshop and use the deinterlace filter. It certainly showed the problem whether Upper or Lower field was selected (in PS filter). (I don't think such a filter exists in A Photo).

Affinity Photo has a deinterlace filter, with even/odd sub-variants, but only as destructive filter. With help of Procedural texture filter it is possible to achieve the same effect non-destructively (but you require a copy of the layer shifted by 1 px, or add a perspective live filter).

[DavidDoesAffinity]

Thank you. I came across it yesterday. The one pixel shift was something I sometimes did in the days of SD. I'm still experimenting and learning.

[DavidDoesAffinity]

4 hours ago, Lisbon said:

Hi @DavidDoesAffinity

I cannot guarantee that this will work. I would need a better quality image to be sure.
But you can try this.

Its a destructive workflow, so start by duplicating the background, name it "Emboss" and change the blending mode to Soft Light.
Next go to Filters > Colours > Emboss
This filter will shift the edges.

After masking you can try to reduce the opacity of the "Emboss" layer to keep the maximum amount of details.

I fell at the first hurdle as I couldn't figure out how to get the blending mode Soft Light onto the duplicated layer as is. All

[Lisbon]

1 hour ago, DavidDoesAffinity said:

I fell at the first hurdle as I couldn't figure out how to get the blending mode Soft Light onto the duplicated layer as is. All

No problem David.

You just need to change the box next to opacity from "Normal" to "Soft Light"

[DavidDoesAffinity]

8 hours ago, Lisbon said:

No problem David.

You just need to change the box next to opacity from "Normal" to "Soft Light"

I feel such an idiot. I have seen that box a 1000 times but only ever used light changes on FX. Thank You.

[DavidDoesAffinity]

One of my video colleagues in Aus has been playing and come up with a 90/1 motion blur and I have to say it just works and my mission is over and I can get back to real work.