Can you remove moire in CS2?

[boxofrocks]

This is the first time I've seen this (on a D2X), and I'm wondering if there's a way to fix this in CS2. Despeckle and gauss blur have been recommended, but they don't help this image. I have the RAW file, if that helps.

Thanks in advance for any help you can give me!

[NoLight]

I know when you install C1 it allows you to install a de moire filter into CS2. You may want to DL the trial version and use the filter..

[Bartman01]

Doesn't directly answer your question, but you should try Nikon's software to 'fix' that. I have gotten moire with my D70 that I had a hard time trying to 'fix' in PS using various methods. Running it through Nikon Capture 4 and using the 'remove moire' control took it right out (with a little loss of detail).

Bad news is that the only thing that can 100% prevent moire is a Foveon type sensor. It will always happen under the right circumstances with Bayer interpolation.

[Duffy Pratt]

That is really nasty, and I found it even in the K channel in CMYK. It's strong in all the other channels I looked at. I think it would be really tough to get rid of the moire and keep any detail in the jacket. At least, I don't know any way to do it in Photoshop.

Duffy

[boxofrocks]

Here's the best I could do with Nikon Capture. I had to create a layer mask to keep the rest of the detail in the photo. It still sucks, but it's better.

[PeteQ]

Tom, try the Nikon software, it seems to do the best for this but you are going to have some trade-off, slight detail loss or live with the moire....

I had one of these guys a month or so ago. Prints weren't too bad, but the screen looked horrible!

On edit: There you go....

[boxofrocks]

I'm finding more of these--here's another example. You can see the difference I could make using Capture. Still not perfect, but better.

Thanks for the help!!

[boxofrocks]

Just as a follow up, Russell Brown has a QT movie in which he describes 2 methods--one easy, one complicated.

The complicated one works like a dream in his video (isolates moire in R, G, or B channel), but in my image, I had moire in all 3 channels, so it wouldn't work.

What a tease.

Link to that video is here.

[huxley]

photoshop the suit out and give him a tux! lol that moire is nasty. hope you get it to where it needs to be. good luck.

[johnastovall]

Try this

.5.2.2 Moire removal


Some cameras like the Nikon D1x, Canon 1D or Kodak 760 produce some color aliasing (small colored pixels in the photo). We remove this the following way (works in 16 bits).

* Convert to LAB mode
* Select both A&B channel

* Use the Dust & Scratches filter (radius 3-7 are good values)

* Convert back to RGB

Full example on Outback Photo here.

Photoshop LAB Color: The Canyon Conundrum and Other Adventures in the Most Powerful Colorspace by Dan Margulis has a section on using lab to remove moire.

[Casper]

Stovall, you have a good answer. I learned a lot about LAB Color from the guys at Reindeer Graphics (.com). They have some great tools for image analysis and enhancement. There are a few free downloads, plug-ins for PS, on their web site that you may like. They get into Fourier space processing as well. The Fourier tools do a good job on moire, but they are not cheap!

Steve

[Duffy Pratt]

If you convert his first file into Lab, you will see the moire showing up strongly in the L channel, as well as the A and B. So the Margulis trick won't work on these images.

Duffy

[boxofrocks]

Originally Posted by Duffy Pratt

If you convert his first file into Lab, you will see the moire showing up strongly in the L channel, as well as the A and B. So the Margulis trick won't work on these images.

Duffy

Yeah, a lot of "tricks" don't seem to work on these.

I have the RAW files; if anybody wants to play with them, shoot me a PM with an email address. If a lot of folks do, I could host them.

I already fixed them to the "good enough for a corporate Christmas party" level, but it might be a good source of education for those looking to figure this out.

[huxley]

ok so i want to know. is it the weave of his suit that is creating the moire effect? or is it a deadly combo of suit and camera with a weakness to moire? i have never run into this yet, but i know with winter coats and sweaters coming out of the closets, this is going to become a bit more common this season. is there anything that can be done IN CAMERA to minimize this in post production?

[Joe_Lorenzini]

D2X? Tom, did Christmas come a little early this year?