[opendtv] Re: Interlace Artifacts

Solid-state imagers, such as line-transfer CCDs, typically dump a field of
samples into masked transfer registers.  All samples in the field are
contemporaneous, even though they are scanned out serially.

All samples in the field are contemporaneous for field-transfer CCDs
operated with a shutter, also.

The field skew you describe is true for image orthicons and for plumbicons.

Al Limberg

----- Original Message ----- 
From: "Tom McMahon" <TLM@xxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Wednesday, January 12, 2005 10:49 AM
Subject: [opendtv] Re: Interlace Artifacts


> 2) Regarding sample-point, I meant a sample point in time.  In other words
the entire frame was captured in an instant, as opposed
> to what a scanning or interlaced camera would do.  Some call this single
time sample "splat-scan".  Or, and Emeril LaGasse would
> say: BAM!
>
> Now, there are issues with this of course, and film isn't splat-scan
because there is shutter angle and light integration time. So
> there are even further variations on the theme.  But interlaced scanning
during acquisition is definitely off in it's own dimension.
> The upper left pixel gets sampled way earlier than the lower right pixel.

 
 
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