Verifies Phase 0 output before any OpenMVS tools run:
- camera intrinsics (focal length, FoV)
- camera-centre trajectory plots (XY/XZ/YZ)
- inter-frame step statistics with outlier detection
- consecutive rotation change (warns if > 10°)
- sample image display with NaN/saturation diagnostics

Fixed a stride-2 parse bug: empty 2D-point lines must be kept
in the line list before the range(0,N,2) loop, otherwise only
every other image record is parsed.
Co-authored-by: Claude <claude@elphel.com>

Shell wrapper: elphel_to_colmap.py → InterfaceCOLMAP →
DensifyPointCloud → ReconstructMesh → RefineMesh → TextureMesh.
Configurable via OPENMVS_BIN, NUM_THREADS, HFOV env vars.
Includes installation note for building OpenMVS from source.
Co-authored-by: Claude <claude@elphel.com>

Reads 32-bit float scene slices from *-TERRAIN-DISP-MERGED.tiff and
per-scene poses from *-INTERFRAME.corr-xml, outputs COLMAP text-format
sparse model (cameras.txt, images.txt, empty points3D.txt) plus
16-bit PNG images for OpenMVS ingestion.

Camera: PINHOLE, fl derived from 32° HFoV (1116 px for 640 px width).
Rotation: mirrors GeometryCorrection.getCommonRotMatrix(); convention
verified in Phase 3 Blender smoke test.
Co-authored-by: Claude <claude@elphel.com>