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- To: <telecine at alegria.com>
- Subject: Re: Interpolation
- From: "Martin Euredjian" <martinfx at email.msn.com>
- Date: Wed, 25 Mar 1998 13:54:55 -0800
- Resent-Date: Wed, 25 Mar 1998 14:02:00 -0800
- Resent-From: telecine at alegria.com
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>>To interpolate is to create a data point in between two existing data
>>Interpolation would create more pixels.
>Actually, removing data samples is called decimation, and should include a
>filtering step to avoid artifacts
These terms are always confused and mis-applied.
Definitions from various Engineering books (shortened to get to the point
" A process by which a value is placed between tabulated values of a
Martin's note: You can do liner or polynomial/FIR based interpolation to
"Estimation of a value outside of the range of tabulated values".
"Reduction of sample rate by removing samples"
Martin's note: Again, FIR low pass filtering is usually done.
I'm not saying that throwing away samples is correct.... all I'm saying is
that this is what is being done for a great deal of major motion picture
effects work. Theory versus practice.
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