November 19th, 2009, 05:25 PM
|
#16
|
|
Inner Circle
Join Date: Sep 2002
Location: Vancouver, British Columbia (formerly Winnipeg, Manitoba) Canada
Posts: 4,088
|
Quote:
Originally Posted by David Heath
In reality it's more complicated than you infer, owing to the necessity to avoid interline twitter. Scanning a chip for interlace means that lines have to be summed, but differently for different fields. Hence the lines of an even field may formed from chip lines 1+2, 3+4, 5+6 etc, the lines of an odd field from 2+3, 4+5, 6+7 etc. This reduces twitter, but also reduces vertical resolution compared to progressive scanning.
|
Agreed. It's actually a more accurate question to ask : "how many lines does it resolve?" than "what is the resolution (in common usage, the NUMBER of lines of pixels)?"
|
|
|
