User Manual

Table Of Contents
Inspector
Proxy (for Tracking)
The input images are resized down by the proxy scale, tracked to produce the disparity, and
then the resulting disparities are scaled back up. This option is purely to speed up the
calculation of the disparity, which can be slow. The computational time is roughly proportional
to the number of pixels in the image. This means a proxy scale of 2 gives a 4x speedup, and a
proxy scale of 3 gives a 9x speedup. In general, 1:1 proxy will give the most detailed flow, but
keep in mind that this is highly dependent on the amount of noise and film grain. If noise is
present in large quantities, it can completely obliterate any gains moving from 2:1 to 1:1 proxy. In
some situations, it can even make things worse. You can think of the Proxy setting as acting as
a simplistic low-pass filter for removing noise/grain.
Advanced
The Advanced settings section has parameter controls to tune the Disparity map calculations.
The default settings have been chosen to be the best default values from experimentation with
many different shots and should serve as a good standard. In most cases, tweaking of the
Advanced settings is not needed.
Smoothness
This controls the smoothness of the disparity. Higher values help deal with noise, while lower
values bring out more detail.
Edges
This slider is another control for smoothness but applies it based on the color channel. It tends
to have the effect of determining how edges in the disparity follow edges in the color images.
When it is set to a lower value, the disparity becomes smoother and tends to overshoot edges.
When it is set to a higher value, edges in the disparity align more tightly with the edges in the
color images, and details from the color channels start to slip into the disparity, which is not
usually desirable.
As a rough guideline, if you are using the disparity to produce a Z channel for post effects like
depth of field, experiment with higher values, but if you are using the disparity to do
interpolation, you might want to keep the values lower.
In general, if the Edges slider is set is too high, there can be problems with streaked out edges
when the disparity is used for interpolation.
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