Let's talk about moire removal

It is possible but a true hassle : you will need to point the filter on each sequence or video shot that suffers from it and only remove the moire on those. (it will degrade image quality, you dont want your whole shots to look bad and soft)

Moreover, it will take days for your computer to remove it in batch processing. You have to consider that video represents 24-30-50-or 60 frames per second which is a lot for your computer to calculate.

sbill said:

I did not look at the videos yet, but isn't it possible to simply add this "moiré removal" in an automated action, included in your usual digital workflow?
Bill

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William Soragna / [email protected]
http://streetgeneration.fr/news/?s=william+soragna

Click to expand...

Here a test with the diffraction of aperture F16 as a anti-aliasing filter.



When you take a picture with a tripod at F4 and F16 you may combine it.

Do you think it would eliminate harsher moires's as well???

I don't think so.

Other thing is that it makes everything blurrier. And you loose shallow DOF.

But surely there is less moire at f22...

jano

Well this method still has its limitations yet is aimed to take out some of the false detail.

Best approaches are always

• Shoot tethered and view at 100% and reshoot if you see Moiré or false detail issues
• Go back and shoot it again if you find Moiré false details after the fact
• Try different raw converters (some are better than others on

If the above 3 don't do it for you then post processing can be done to minimize the Moiré and false detail yet will never be as good as a reshoot. Post processing should be a last resort unless you can live with the somewhat degraded image.

Just gave it a go on the two far right grain storage towers. I am sure I could get a much better result with the original RAW data that has not been modified.
Click on Image to see the repairs



--
John Wheeler

JohnWheeler said:

Well this method still has its limitations yet is aimed to take out some of the false detail.

Click to expand...

There's obviously a loss of real detail, but that's still an impressive fix. Are you willing to explain your method?

Julian Vrieslander said:

There's obviously a loss of real detail, but that's still an impressive fix. Are you willing to explain your method?

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Thanks for the interest Julian. It is under development and will be shared publicly on my blog http://jkwphoto.blogspot.com That blog also has the details of the technique I developed a year ago referenced elsewhere in this thread as http://vimeo.com/23508129 (A new way to remove Moire)

Would you happen to have access to the original Raw file of this very tough false detail/Moiré image. I am searching out tough examples to see how well the technique works on original bits.

In general, the aliasing and false detail we see in the images is a result of the specific demosaic algorithm. The false detail is sometimes predictable on where it shows up. Therefore, I use the image and combine it back it on itself to subtract out such false detail. Unfortunately, that can take a hit on real detail as well. This approach would be more of a last resort to minimize the "distraction" that the false detail can create.

Thanks in advance if you have access and are willing to share the original Raw bits

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John Wheeler

JohnWheeler said:

Thanks for the interest Julian. It is under development and will be shared publicly on my blog http://jkwphoto.blogspot.com That blog also has the details of the technique I developed a year ago referenced elsewhere in this thread as http://vimeo.com/23508129 (A new way to remove Moire)

Click to expand...

I was aware of that tutorial, but I did not connect it to your name. It appears that you've added more material to the page since I first saw it, and I'll be watching for the promised "part 2".

JohnWheeler said:

Would you happen to have access to the original Raw file of this very tough false detail/Moiré image. I am searching out tough examples to see how well the technique works on original bits.

Click to expand...

The photo of the silos comes from a review of the Leica M9 on Steve Huff's web site:

http://stevehuffphotos.com/Steve_Huff_Photos/THE_LEICA_M9_REVIEW_3.html

The image is about half-way down this page. Click on it to bring up a larger version.

Perhaps if you contacted Steve, he would consent to provide you with the RAW file. After confronting a moiré infestation as ugly as this one, I suspect that he would be quite willing to assist in developing a good corrective workflow.

Keep us informed on how this goes...

calson said:

Those that buy the D800E and do nature ..... photography are likely to never encounter Moire but may encounter specular highlights.

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I have certainly experienced pattern moire in small bird feathers with the Nikon V1. This can ruin an image as may be uncloneable. I have ordered the non E version because of this.

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Cheers, BB
FlickR site
http://www.flickr.com/photos/brandon_birder/
FlickR Nikon1 V1 gallery
http://www.flickr.com/photos/brandon_birder/sets/72157628774050455/

I think a very useful comparison for the D800 and D800e reviews would be to take a series of identical or near identical images from either camera and process them to the best case for each: the sharpest, cleanest, most artifact free file, printed and displayed at a large print size.

That's the comparison I'm waiting for. What are the quality differences, and how much work is required to achieve them?

Ditto thanks from me too. I like the hue/saturation method. Super simple but works better than anyting else I have tried. Of course I haven't had to deal with it in a long time, but I am ready for it again.

A Nikon rep in Japan told me that Nikon expected to sell D800800e =10:1 rate, but the pre-order rate is actually almost 1:1.

He says Nikon really concerns about it.