Jump to content


Photo

Removing Moire in Post


  • Please log in to reply
7 replies to this topic

#1 Eli Goldstein

Eli Goldstein

    New

  • Basic Members
  • Pip
  • 5 posts
  • Cinematographer

Posted 01 August 2011 - 06:49 PM



Does anyone have any advice for removing moire in post? I shot these cheap nylon bags and the moire is terrible. I'm not sure if there's a program/technique powerful enough to remove this.

Tried this free fcp plugin http://colorbyjorg.w...ss.com/plugins/ to no avail (sigh).

Also note, this is a static shot, the zoom was created in post. So... I'm considering creating a still and working with it in photoshop, then creating the zoom again.

Thanks!

Eli
  • 0

#2 Jon Schweigart

Jon Schweigart
  • Basic Members
  • PipPip
  • 30 posts
  • Cinematographer
  • Los Angeles

Posted 01 August 2011 - 07:30 PM

Anti Moire filter for FCP

I've tested it and it works really well. Softens a little but its better than wavy rainbows.

http://marvelsfilm.w...-free-download/
  • 0

#3 Jon Schweigart

Jon Schweigart
  • Basic Members
  • PipPip
  • 30 posts
  • Cinematographer
  • Los Angeles

Posted 01 August 2011 - 07:31 PM

Same filter sorry.
  • 0

#4 Eli Goldstein

Eli Goldstein

    New

  • Basic Members
  • Pip
  • 5 posts
  • Cinematographer

Posted 01 August 2011 - 08:01 PM

Whoa, I lucked out and just realized I shot a RAW still of the costumes before filming. The 7D has lots a motion problems, but it's a hell of a still camera!

I'm still curious for future projects if anyone recommends an anti-moire plugin.

Thanks anyway Jon. I imagine that plugin works great for different/more minor moire applications.
  • 0

#5 M Joel W

M Joel W
  • Basic Members
  • PipPipPipPip
  • 268 posts
  • Student

Posted 01 August 2011 - 09:18 PM

http://www.cinema5d....p?f=24&t=26629A

I've tried neat video (it must be with a temporal window of 5 frames)/chroma blur, as suggested above, and it generally cleans up any moire that wasn't immediately very visible on the LCD (and if it's that bad, there's no cure other than superimposing a still image, as you suggest, or shooting the shot just a tiny bit out of focus, which can work fine, anyway).

All these solutions, including the one I linked to and the FCP plug in, do a wide-radius chroma blur and thus reduce color resolution and apparent saturation. Just something to be aware of.
  • 0

#6 Eli Goldstein

Eli Goldstein

    New

  • Basic Members
  • Pip
  • 5 posts
  • Cinematographer

Posted 09 August 2011 - 01:02 PM

Here's the final version if anyone was curious:



You can see the bags at 7 seconds. And ended up using that RAW still... which I was lucky I had.

Eli
  • 0

#7 John Sprung

John Sprung
  • Sustaining Members
  • 4635 posts
  • Other

Posted 09 August 2011 - 01:43 PM

I'm still curious for future projects if anyone recommends an anti-moire plugin.


For future projects, it's best to eliminate moire in production. It's caused by detail that's over the Nyquist limit, which can only really be filtered out before it hits the chip. Use a real motion camera with a proper OLPF.




-- J.S.
  • 0

#8 Hal Smith

Hal Smith
  • Sustaining Members
  • 2280 posts
  • Cinematographer
  • OKC area

Posted 14 August 2011 - 10:59 AM

For future projects, it's best to eliminate moire in production. It's caused by detail that's over the Nyquist limit, which can only really be filtered out before it hits the chip. Use a real motion camera with a proper OLPF.


Netting the back of a lens on a DSLR can help to tame moire. It's effectively an OLPF since its behind the lens and the relationship between the focal length of the lens and gauge of the stocking doesn't change.

Any of the stockings used in the past to net lenses should work. Personally I've been using the Frau's black LEGGS stockings and if I ever get the time (Ha-Ha!) I plan on experimenting with some of the more traditional stockings used for netting like the Diors, etc.
  • 0


Broadcast Solutions Inc

Tai Audio

Rig Wheels Passport

Ritter Battery

Aerial Filmworks

Willys Widgets

Abel Cine

CineLab

Media Blackout - Custom Cables and AKS

Technodolly

Opal

Wooden Camera

rebotnix Technologies

Gamma Ray Digital Inc

FJS International, LLC

CineTape

Glidecam

Visual Products

Metropolis Post

The Slider

Paralinx LLC

Abel Cine

Aerial Filmworks

rebotnix Technologies

The Slider

Metropolis Post

CineTape

Glidecam

Media Blackout - Custom Cables and AKS

Tai Audio

Wooden Camera

CineLab

Technodolly

Visual Products

Rig Wheels Passport

Broadcast Solutions Inc

Gamma Ray Digital Inc

FJS International, LLC

Opal

Willys Widgets

Ritter Battery

Paralinx LLC