Multi-sensor cameras: total resolution versus local detail
Evaluate each direction, seam and recorded channel independently.
Updated
Principle and limits
Multiple sensors can cover different directions or form a stitched view. Their combined megapixels do not all describe the same target. Stitching, overlap and dewarping change the mapping from scene to output pixels; enlarging the output does not create captured detail. Ask whether the NVR records original channels, a composite or both, and which view an analytic uses.
Installation and acceptance
Walk a target across seams and near-field boundaries. Compare exposure differences, stitching artifacts, focus and playback navigation. Verify bandwidth and retention for all recorded streams together. Where one sensor is steerable, test its changed coverage instead of assuming the factory orientation remains valid after installation.