Data Collection Recommendations for Full Motion Video (FMV)

This section outlines Skyline’s recommendations for optimal 3D PhotoMesh reconstruction from full motion video. The recommendations below are for oblique data. It is generally recommended to use nadir video datasets only for production of orthophotos or point clouds, and not for full 3D Mesh models.

Video Camera – Hardware and Settings

§  Use video setting most suitable for sharp video frames in motion.

§  Use gyroscope or accelerometer-based gimbal or other 3-axis stabilization.

Flight Planning and Execution

§  Slow flight to prevent motion blur.

§  Minimum field of view - 45 degrees (optimal: 60-100 degrees), depending on the lens quality.

§  Minimum lateral (side) overlap - 40% (optimal: 60-80%).

§  Minimum overlap between consecutive photos - 60%. This can be achieved by a combination of flight speed and frame rate.

§  It is recommended to use consistent zoom, especially in random flight patterns.

§  For large area collection, use a criss-cross grid pattern.

§  For single building or small area collection, video the target feature from different altitudes, and different pointing angles for complete coverage.