Here is a list of all namespaces with brief descriptions:

Ncv
Nfmt
Npcl
Nreusex
Ncore
Njson_export
Njson_import
Nserialization
Ntraits
Ndetail
Ngeometry
Ncgal
Ndetail	Internals of detect_loop_edges, exposed ONLY so the geometry stages of the pipeline can be regression-tested without a database and without RGB-D fixtures (docs/STANDARDS.md §7; same rationale as plane_factor_consistent_residual() in PlaneGraphOptimizer.cpp)
Nse3	Minimal se(3) exp/log used by the joint pose optimizer
Ngsplat
Nio
Nspeckle
Npipeline
Nutils
Nvision
Ncommon
Nobject
Ntensor
Nlibtorch
Nonnx
Nosd
Ntensor_rt
Naffine
Ncpm
Nnorm_image
Nnv
Ntensor
NTensorRT
Ntorchvision
Nvisualize
Nrux
Ndatabase
Nfilters
Ngui
Nview
Nspdmon