Problem
Motion tracking drifts because the tracked feature changes perspective during a camera push-in.
Solution
Root Cause / Diagnostic:
Standard point trackers rely on cross-correlation pattern matching against a static 2D search window established on frame one. During an optical camera push-in or dolly move, the tracked feature undergoes continuous scale changes, perspective distortion, and lighting variations. The initial pixel template rapidly ceases to match the transformed target feature, causing the tracking search kernel to accumulate sub-pixel positional errors and drift off-target.
Actionable Fix:
1. Switch from a standard single-point or two-point tracker to a planar tracker (e.g., Mocha AE) or configure the point tracker with 'Track Type: Perspective' and continuous template updating.
2. Define a planar tracking spline enclosing a coplanar surface that contains high-contrast texture across multiple depth planes.
3. Play back the track with an on-screen tracking grid overlay enabled, verifying that the grid remains solidly anchored throughout the camera move.
Pro Tip:
When using Mocha AE for perspective pushes, disable translation tracking momentarily if tracking planar shear and perspective transforms across rapid zoom focal shifts.
Standard point trackers rely on cross-correlation pattern matching against a static 2D search window established on frame one. During an optical camera push-in or dolly move, the tracked feature undergoes continuous scale changes, perspective distortion, and lighting variations. The initial pixel template rapidly ceases to match the transformed target feature, causing the tracking search kernel to accumulate sub-pixel positional errors and drift off-target.
Actionable Fix:
1. Switch from a standard single-point or two-point tracker to a planar tracker (e.g., Mocha AE) or configure the point tracker with 'Track Type: Perspective' and continuous template updating.
2. Define a planar tracking spline enclosing a coplanar surface that contains high-contrast texture across multiple depth planes.
3. Play back the track with an on-screen tracking grid overlay enabled, verifying that the grid remains solidly anchored throughout the camera move.
Pro Tip:
When using Mocha AE for perspective pushes, disable translation tracking momentarily if tracking planar shear and perspective transforms across rapid zoom focal shifts.