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Reset Size
This resets the image dimensions to the size of the input image.
Reset Offset
This resets the X and Y Offsets to their defaults.
Change Pixel Aspect
Enable this checkbox to reveal a Pixel Aspect control that can be used to change the image’s
pixel aspect.
Clipping Mode
This option sets the mode used to handle the edges of the image when performing domain of
definition (DoD) rendering. This is profoundly important for nodes like Blur, which may require samples
from portions of the image outside the current domain.
– Frame: The default option is Frame, which automatically sets the node’s domain of definition
to use the full frame of the image, effectively ignoring the current domain of definition. If the
upstream DoD is smaller than the frame, the remaining area in the frame will be treated as black/
transparent.
– Domain: Setting this option to Domain will respect the upstream DoD when applying the node’s
effect. This can have adverse clipping effects in situations where the node employs a large filter.
– None: Setting this option to None does not perform any source image clipping at all. This means
that any data required to process the node’s effect that would normally be outside the upstream
DoD is treated as black/transparent.
Auto Crop Tab
Auto Crop tab analyzes the selected channel and crops the image based on that channel’s
boundaries. The adjustments from auto crop are seen in the Crop tab parameters.
The Auto Crop tab
RGBA Color Channels
Select which channels are examined for an Auto Crop. This is useful for auto cropping images with
non-solid backgrounds in a specific color channel, like a blue color gradient. Toggling the channel off
causes Auto Crop to ignore it when evaluating the image.
Auto Crop
This evaluates the image and attempts to determine the background color. It then crops each side of
the image to the first pixel that is not that color.
Common Controls
Settings Tab
The Settings tab in the Inspector is also duplicated in other Transform nodes. These common controls
are described in detail at the end of this chapter in “The Common Controls” section.
Chapter 118Transform Nodes 2376
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