9 Feb
2011
9 Feb
'11
2:17 a.m.
On Tue, 8 Feb 2011, Brent Hilpert wrote:
I know what you mean here, so not to argue your point about the analog
process in the system under discussion, but I would like to add an historical
footnote: even analog raster-scan systems were characterised in terms of
"picture elements" going back to the very early days of TV.
That's exactly the point: those Tektronix terminals/computers are not
raster-scan systems, you draw a line from here to there. The only
"limitation" is the addressing range for the start and end point (either
10 or 12 bits). Speaking of the printer, AFAIK it's the printer that
determines the scanning speed and the resolution of the rasterization
process.
For that matter, how big are the pixels?
There aren't any pixels. systems at the time. The phrase "picture
element" is used throughout. The
then-current transmission standard was characterised as 441 lines by 400-600
picture elements per line, "that 3,000,000 to 6,000,000 elements must be sent
... which is not quite correct since the horizontal "resolution" depends
on the bandwidth, the beam spot size and the size of the screen surface.
in a second", etc. The characteristics of other
mediums such as photographs
are also presented in terms of picture elements.
?!? I know that the grain size matters, but where can I find those picture
elements on a film strip?
Christian