Case Study: Brooklyn

Project Target & Shot Conditions

The aim of this project was to track a camera sequence over the Brooklyn Bridge with unknown settings, solve a physical camera path, and model a matching geometry hull for the bridge structure.

Large scale engineering structures present tracking challenges due to the atmospheric distortion over water, perspective changes, and massive scale variation. Modeling a matching geometry hull is essential for projection mapping, lighting checks, and shadow-catching overlays.

Adopted Workflow

1. Cable Feature Tracking: Tracing fine cable structures and vertical struts along the bridge to establish geometric anchors.
2. Lens Parameter Solve: Undistorting wide DSLR lens plates to rectify barrel distortion.
3. Virtual Camera Path Solve: Solving coordinate positions across parallax shifts.
4. Bridge Geometry Modeling: Reconstructing the bridge pillars and cables in 3D to fit the solved camera path.

Solver Challenges & Solutions

Massive Parallax Shifts: Foreground rails move extremely fast while distant bridge arches stay almost static. Solver weights had to be manually distributed to ensure distant points stabilized the path solve.

Atmospheric Distortion: Heat waves and moisture over the river blur structural details. Color grading and high-contrast filters were applied to utility tracks to lock feature anchors.