Graphics Reference
In-Depth Information
IMAGE PAIRS IN L/R SYNC
L
L2
L4
L3
L1
L
...
R
R4
R2
R1
R3
R
...
IMAGE PAIRS OUT OF L/R SYNC
L
L2
L3
L5
L
...
L4
R
R1
R4
R2
R3
R
...
Figure 1.8
Core 3D Temporal Condition—L/R Synchronization.
L/R Sync Errors
A prime example of how a decision or circumstance in 3D production can affect
postproduction is commonly called a “sync error.” Sync errors occur when shutters
are not synchronized between L and R imagers. It is not just a matter of lining
up the correct corresponding L and R frames on an editorial timeline and then
proceeding. This L/R frame-to-frame matching is done all the time in preparing 3D
i les for editorial. The issue is when the mismatch between L and R causes temporal
and spatial issues which in turn cause artifacts. In some cases these artifacts are
severe enough that they cause discontinuity and or discomfort. The issue may
have stemmed from mismatched settings between L and R cameras in a rig, a
bad cable, imager, faulty timecode system, radio interference, human error, and a
host of other issues and combinations of issues. But regardless of the source of
the issue, you as a post person may need to resolve it. In some cases, sync issues
can only be resolved with 2D-to-3D conversion.
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