AJA FS2 - Manual (Page 166)

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Region of
Interest The Region of Interest parameters (14.0–14.4) select a portion of the input picture
that will be used for scaling and/or positioning. This feature can be useful for
focusing in on computer video that is less than full screen, such as the contents of a
movie player window. The selected area can then be scaled to a standard pillarbox
or letterbox size and shape (On Square), or it can be set to a full screen input image
(On Full). (Note that On Full may cause image distortion if it is used to expand an
odd-shaped region of interest to full screen.) When 14.0 ROI is enabled, the ROI Left,
Right, Top, and Bottom controls (14.1–14.4) define the rectangular shape and
position of the ROI.
The ROI Setup mode allows you to preview the edges of your selected Region Of
Interest as you set it up. After selecting the desired region using the Setup Cursor,
you can take the region to air by setting Region Of Interest to On Square or On Full.
Note that the Setup mode is not required to operate the ROI feature. The edges of
the Region Of Interest can also be adjusted while in On Square or On Full modes.
Notes:
There are interactions between 14.0 ROI and other parameters:
The Region of Interest menu is not displayed when Active Format Description
(AFD) is in control of the Conversion Mode. While downconverting, with
Downconvert Mode set to Auto AFD, any values assigned for Custom Size/Pos
parameters are ignored, and the menus are hidden.
Custom Size and Position settings work interactively with ROI, but Custom Crop
settings are disabled. Custom Size/Pos is also temporarily disabled while in the
ROI Setup mode.
(14.0) Region of Interest Selections Selection Descriptions
Off (default)
Setup
On Square
On Full
Turns off the ROI feature.
Enables ROI cursor.
Enables ROI and sets video to a pillarbox or letterbox shape.
Enables ROI, and expands the ROI area to full screen. Note: this setting
expands pixels to fill the screen and may result in image distortion.