deleting every other line in an image

Luis luis at anachreon.co.uk
Tue Nov 13 18:05:52 CST 2007


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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