Perspective Grid Menu Settings

Transform Mode option

Select either 2D (homographic planar projection of the perspective) or 3D (full 3D perspective transformation) mode. Some settings are not available depending on the mode chosen.

Note: Perspective Grids contained in Action setups from a previous release appear in 3D Legacy mode, maintaining the previous grid position.

Invert

Enable to remove the animated perspective of the object parented to the grid. Available only in 2D mode.

Scale field

Displays the size of the object under the perspective grid.

Reset

Click to reset the perspective grid settings (does not reset the active perspective camera settings).

Top Left X field

Displays the top left X position of the grid. You can also edit this position directly in the image window.

Top Left Y field

Displays the top left Y position of the grid. You can also edit this position directly in the image window.

Top Right X field

Displays the top right X position of the grid. You can also edit this position directly in the image window.

Top Right Y field

Displays the top right Y position of the grid. You can also edit this position directly in the image window.

Bottom Left X field

Displays the bottom left X position of the grid. You can also edit this position directly in the image window.

Bottom Left Y field

Displays the bottom left Y position of the grid. You can also edit this position directly in the image window.

Bottom Right X field

Displays the bottom right X position of the grid. You can also edit this position directly in the image window.

Bottom Right Y field

Displays the bottom right Y position of the grid. You can also edit this position directly in the image window.

Grid Width field

Displays the width resolution (in Action coordinates) of a 2D perspective grid with Invert enabled.

Grid Height field

Displays the height resolution (in Action coordinates) of a 2D perspective grid with Invert enabled.

Constraint option

Select whether to lock the height or width of the grid when manipulating the grid points (select Lock Both to lock the width and height). Lock Both is selected automatically when planar tracking.

Z Offset field

Displays the distance between the perspective grid and the camera along the Z axis to make a 3D grid larger or smaller while maintaining the visual result.

Perspective Camera field

Displays the active perspective camera number.

Stereo Camera Perspective option

Select whether to use the left or right camera from a stereo camera rig when working with the perspective grid.

FOV field

Displays the field of view of the active perspective camera. When adjusting the perspective grid, the FOV of the target camera updates automatically (unless Lock is selected as the FOV Adjustments option).

FOV Adjustments option

Select an FOV camera adjustment mode.

Select:	To:
Static	Use all corner keyframes to compute an overall FOV and set the camera to non-animated during tracking of the perspective grid. By using multiple keyframes of corners, this is a better estimate of FOV (for sequences where FOV does not change).
Dynamic	Allow adjustments of the target camera FOV and position during tracking of the perspective grid. Use when the FOV changes over the length of the sequence.
Lock	Lock the camera FOV and position during tracking of the perspective grid.

Tracking Mode option

Select the tracking mode.

Enter Tracker

Click to open the Tracker menu to apply tracking data for the selected tracking mode.

Rotation

Enable to apply rotation data to the track.

Skew

Enable to apply skew data to the track.

Scale

Enable to apply scale data to the track.

Perspective

Enable to apply perspective data to the track.

Camera option

Specify which camera to take into account when tracking or viewing in Action Object view (F8).

Use Media field

Displays the number of the media associated with the analysis. To track the Back media, select 0.

Tracking View option

When the media associated to the analysis is a Source node, select to track the media in the Source Front, Source Matte, or Source Result view.

Media FX

Enable to take into account blur and colour correct settings from the Action Media list in the analysis.

Planar Tracking Settings

Analyze

Click to start the planar tracking analysis.

Direction option

Select whether to track forward or backward.

Go to Reference

Click to move to the frame of the last Snap operation, or press Ctrl and click to go to the last analyzed frame.

Step

Click to advance to the next frame and analyze.

Set

Click to analyze the current frame, based on the reference frame, to realign the shape used for tracking. Press Ctrl and click Set to add a keyframe on the track without doing any analysis.

Skip

Click to advance to the next frame and delete the selected point on the tracking path (performs a combination of the Step and Delete buttons).

Delete

Click to delete the selected point on the tracking path. You can also use the Backspace key to delete the current keyframe, and move to the previous keyframe.

Auto Update Reference

Enable to update the tracking reference at the current frame after each analysis. Disable to track the movement of the reference point specified in the reference frame.

Snap

Click to redefine the tracking reference at the selected frame.

GMask Inclusive option

Select whether to use the union of parented GMasks or GMask softness as the tracking reference. Select None to use the whole image (Axis), or the four corner region (Perspective Grid).

GMask Exclusive option

Select whether to exclude GMasks in the tracking analysis.

Tracking Algorithm option

Select which planar tracking algorithm to use. Select Region Warping to use all the pixels defined within the reference, or Multi Feature Detection to use some points defined within the reference. Different settings appear below based on the algorithm chosen.

Sampling field

Displays the size of the reference for Region Warping. A smaller reference increases performance at the expense of the quality of its results.

Lighting

Enable to estimate local lightning variations of the tracked surface.

Occlusions

Enable to automatically exclude parts of the reference to be analyzed based on their likelihood to be occluded.

Analyze RGB Channels

Enable to include all colour channels in the tracking analysis. Disable to only track luminance.

Average field

Displays the blending factor to apply to the tracking analysis, based on the neighbouring frames. Use to remove jitter, for example. Note that this operation is destructive, and once applied, the value returns to 0 (you can use Undo to revert, if needed).

Size field

Displays the area in pixels of each tracker.

Min Number field

Displays the minimum number of trackers to use in the analysis.

Tolerance field

Displays the level of acceptable changes in the pixel environment. For example, a low tolerance value ensures that the motion of an external object passing in front of the tracked object does not get tracked through the analysis.

Shape Reference

Enable to display an overlay of the reference frame when tracking in Object view (F8).

Shape Current

Enable to display an overlay of the current frame when tracking in Object view (F8).

Magnifier

Enable to display the magnifier while dragging a corner of the perspective grid rectangle.

Zoom field

Displays the zoom factor of the magnifier.

Display Grid

Enable to display the grid lines in Result or Object view.

Grid Colour

Displays the colour of the grid lines. Click to change the colour.