deleting every other line in an image
Josh Mellicker
josh at dvcreators.net
Tue Nov 13 20:51:11 EST 2007
This is correct.
"i" = interlaced
"p" = progressive
Many people shoot in non-interlaced modes nowadays, but some don't,
and there is "legacy" footage...
On Nov 13, 2007, at 4:05 PM, Luis wrote:
> I think 1080i is interlaced, 1080p is not.
>
> Cheers,
>
> Luis.
>
>
>
> Stephen Barncard wrote:
>> And you don't have 1080p available from the source? That wouldn't
>> be interlaced, methinks.
>>> Thanks!
>>>
>>> This is exactly what I needed!
>>>
>>>> just curious: why do you want to eliminate every second line of
>>>> an image?
>>>
>>>
>>> Video cameras interlace two images taken a fraction of a second
>>> apart into a single frame, leading to interlacing artifacts (a
>>> serrated edge on fast moving objects).
>>>
>>> Your script will eliminate one of the fields, thereby isolating a
>>> single "time slice" of reality.
>>>
>>> This comes at the expense of 50% loss in vertical resolution.
>>> Luckily, an HD image has 1080 pixels to start with, so 540 pixels
>>> vertical is plenty for web use.
>>>
>>> Thanks, can't wait to try it!
>>>
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