Preprocess
Drop bad frames; fix rotation; keep WB/exposure reasonably consistent across the set.
Auto-registration and sample size
Run RC auto-alignment; community practice often cites O(100)+ images for easier convergence when motion and texture are favorable—still scene-dependent. [unverified]
When alignment fails
Scattered alignment rarely fixes with manual control points—add overlap and baseline diversity, then proceed to your trainer or cloud pipeline.