Graphics Reference
In-Depth Information
Equations 2.10 and 2.11 can be utilized to render the virtual camera views of the parallel
stereoscopic camera setup. The characteristics of the rendered virtual left and right views
going to be affected by the choice of inter-axial distance
t
c
, the focal length
f
of the refer-
ence camera and the convergence distance
Z
c
. Table 2.1 shows how the 3D perception is
affected due to these parameter settings. These effects can be attributed to the effects of
real stereoscopic camera setup with the adjustments to their camera positions (e.g. inter-
axial distance) and intrinsic parameters (e.g. focal length).
Parameter
+/-
Screen parallax
Perceived depth
Object size
+
Increase
Increase
Constant
Interaxial distance
t
c
-
Decrease
Decrease
Constant
+
Increase
Increase
Increase
Focallength
f
-
Decrease
Decrease
Decrease
+
Decrease
Shift (forward)
Constant
Convergencedistance
Z
c
-
Increase
Shift (backward)
Constant
Table 2.1:
Effects of different stereo camera setup parameters. Qualitative changes in screen parallax values, per-
ceived depth and object size when varying the inter-axial distance t
c
, the focal length f or the convergence distance
