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I know there is a special term...


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#1 Daniel Madsen

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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??
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#2 Mitch Gross

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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.
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#3 Daniel Madsen

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Posted 31 January 2006 - 11:51 PM

moire...that is the term I was fishing for.... thanks
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#4 Mitch Gross

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Posted 01 February 2006 - 12:10 PM

Moire is the resulting pattern. Aliasing is what causes it.
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#5 David Mullen ASC

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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.
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