Pixel aspect discrepancy
27-Nov-94 21:23:06
Sb: #138008-Pixel aspect discrepancy
Fm: alec jason 71137,2632
To: M. G. BATCHELOR 71532,1214
This pixel aspect thing has always been an area of confusion for me
and here's another reason why:
I'm preparing a homicide trial demonstration in which I need to show
the dynamics of the reflective property of an ellipse (as it relates
to a bullet wound.) I'm using a spotlight at different angles of
incidence against a flat surface to illustrate the relationship
between the light angle and the ellipse's major and minor axes.
So, I need the rendered circle and ellipsis to be accurate. But when I
render perfect circles at 640 x 480 using an aspect ratio of "1", the
circle I get does not appear to be symetrical — when I use a ruler
to measure it on the monitor. I do get a near perfect circle when I
use an aspect ratio of "99". It could be that I'm not measuring
accurately or that my monitor is weird.
Any thoughts on this?
Alec Jason