Jump to content


Photo

I know there is a special term...


  • Please log in to reply
4 replies to this topic

#1 Daniel Madsen

Daniel Madsen
  • Basic Members
  • PipPipPip
  • 201 posts
  • Student
  • Boston

Posted 31 January 2006 - 02:16 PM

You have all seen the results of shooting fine line detail (especially horizontal lines), like a striped shirt. The image is very distorted- zig zaggy. I know there is a special term for this type of distortion but I can't think of it. Any help??
  • 0

#2 Mitch Gross

Mitch Gross
  • Basic Members
  • PipPipPipPip
  • 2873 posts
  • Cinematographer

Posted 31 January 2006 - 02:20 PM

That is a moire pattern, and is referred to as Aliasing. When it is more minor, such as the edge of a sidewalk bouncing back and forth between two lines in seperate fields of interlaced video, it is commonly referred to as "twitter," although I don't know if this is considered a proper technical term.
  • 0

#3 Daniel Madsen

Daniel Madsen
  • Basic Members
  • PipPipPip
  • 201 posts
  • Student
  • Boston

Posted 31 January 2006 - 11:51 PM

moire...that is the term I was fishing for.... thanks
  • 0

#4 Mitch Gross

Mitch Gross
  • Basic Members
  • PipPipPipPip
  • 2873 posts
  • Cinematographer

Posted 01 February 2006 - 12:10 PM

Moire is the resulting pattern. Aliasing is what causes it.
  • 0

#5 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 20074 posts
  • Cinematographer
  • Los Angeles

Posted 01 February 2006 - 12:18 PM

Moire is the resulting pattern. Aliasing is what causes it.

There is also the "toothcomb" or "sawtooth" effect on the edges of moving objects when fields are combined into frames.
  • 0


The Slider

FJS International, LLC

CineLab

Abel Cine

Technodolly

Aerial Filmworks

Gamma Ray Digital Inc

Visual Products

Paralinx LLC

New Pro Video - New and Used Equipment

CineTape

Metropolis Post

Broadcast Solutions Inc

Wooden Camera

rebotnix Technologies

Media Blackout - Custom Cables and AKS

Willys Widgets

Tai Audio

Rig Wheels Passport

Glidecam

Ritter Battery

Abel Cine

Willys Widgets

Metropolis Post

CineLab

Technodolly

Ritter Battery

Media Blackout - Custom Cables and AKS

FJS International, LLC

Paralinx LLC

New Pro Video - New and Used Equipment

Gamma Ray Digital Inc

Tai Audio

The Slider

Wooden Camera

Visual Products

CineTape

Glidecam

Rig Wheels Passport

Aerial Filmworks

Broadcast Solutions Inc

rebotnix Technologies