lf_center_view — LIGHTFIELD `views` op

• Data kinds: lightfield → image2d

• Call: import lightfield; lightfield.lf_center_view(lf, mode='average') (or opslightfield.get("lf_center_view"))

Usage

The centre viewpoint — the ordinary 2-D image a plenoptic camera also gives.

For odd `V and U` the centre is a single view and both modes return it

exactly. For an even axis the centre falls *between* two views, and this

operator does not pretend otherwise:

• `mode="average"` (default) returns the mean of the 2 (or 4) views

straddling the centre — the correctly-centred estimate for a Lambertian

scene, at the cost of a slight blur proportional to the disparity.

• `mode="nearest" returns the single view at floor((N-1)/2)`, which

is sharp but sits half an angular step off centre; every disparity

measured against it carries that half-step bias.

Returns a `(H, W)` 2-D image.

Raises `ValueError`: *lf* not a valid light field, unknown *mode*.

Detailed usage guide

• lightfield_depth family guide

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• lightfield_depth — py -3.11 examples/lightfield_depth.py

Ops the type connects to (they accept `image2d` as input)

lf_from_mla · lf_disparity_to_depth · lf_all_in_focus

Same category (`views`)

lf_subaperture · lf_views · lf_epi

*Provenance: lightfield.py — LIGHTFIELD operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

lf_center_view — LIGHTFIELD views op