The DEPTH Workflow - 3D Postproduction: Stereoscopic Workflows and Techniques - page 156

5.6.3.1 Image Analysis Systems
Some depth grading tools perform semi-automated image analysis on image
pairs and identify shots that exceed near and far maximums. Just remember
that automated does not mean “automatic.” Image analysis tools can be fooled
by certain situations such as fast movement, objects/talent crossing close
to camera and other issues that can help you identify. The results of this
analysis can under the right conditions assist teams in spotting, classifying,
and resolving depth issues. Neither the manual or semi-automated tools are
inherently superior. If your show needs automated depth functionality, then
get it. If it does not, then don't. Verify it by running a test. For a three-minute
music video on a leisurely post schedule, manual depth adjustments might
work i ne. A show dealing with extensive footage that needs to deliver in a few
days might i nd semi-automated depth functionality worthwhile, especially
as a primary depth pass to set the stage for a secondary creative depth pass.

5.6.3.2 Depth Grading Systems
These systems consist of hardware/software that enable handling and spatial
manipulation of 3D imagery in order to modify horizontal parallax and thus,
the apparent location in Z-space of the area of interest. These solutions can

PROCESS FACTORS

What does team use to input and output
imagery and metadata to and from Depth
workflow?
Do all depth tools adjust depth the
same way?

INPUT/
OUTPUT

CALIBRATION

Are monitors/displays in each workflow
sufficient to review depth?

VIEWING

TOOLS

Are there any automated tools used to
analyze depth?

ANALYSIS

GRADING/
CORRECTION

Can tools used for editorial work also be
used for depth?

QUALITY
CONTROL

Which tools can assist teams in
evaluating depth work?

Figure 5.12 Key questions the depth team can ask about tools for each process area
in the depth workl ow.