fullseye

lf_aperture_mask — LIGHTFIELD refocus op

• データ種: なし → image2d(引数だけで決まる op —— 画像やデータの入力を取らない)
• 呼び出し: import fullseye as fs; fs.ledger.lf_aperture_mask(angular=(5, 5), shape='circle', *, radius=None, inner=0.0, sigma=None, normalize=True) (実装を直接呼ぶなら import lightfield; lightfield.lf_aperture_mask(angular=(5, 5), shape='circle', *, radius=None, inner=0.0, sigma=None, normalize=True)、台帳から引くなら opslightfield.get("lf_aperture_mask"))

使い方

Angular weighting mask — the synthetic aperture you stop down or shape.

Returns a (V, U) 2-D array of per-view weights, indexed the same way as the light field’s angular axes, for :func:lf_synthetic_aperture. The radius is measured in angular steps from the centre ((V-1)/2, (U-1)/2), so radius=0 selects the single centre view (an infinitely small aperture: everything in focus, no light) and the default radius = max(V-1, U-1)/2 is the largest circle that fits.

• circle — hard-edged disc, the physical iris.
• square — Chebyshev disc; separable, the cheapest to reason about.
• gaussian — apodised pupil (sigma in angular steps, default radius/2); no ringing in the defocus PSF.
• annulus — ring between inner and radius; a coded aperture whose defocus PSF has more high-frequency content, which is what makes depth-from-defocus work better.

With normalize=True (default) the weights sum to exactly 1, so a masked reduction is a weighted mean and its result is directly comparable with :func:lf_refocus. Set it to False to keep 0/1 selection weights.

Raises ValueError: an angular shape outside [1, MAX_ANGULAR], a negative radius / inner / sigma, inner >= radius, an unknown shape, and — explicitly rather than returning a field of zeros — a mask that selects no view at all (an opaque aperture), which would make every downstream weighted mean a 0/0.

詳しい使い方ガイド

• lightfield_depth ファミリ ガイド

参考(サンプルデータ・文献)

• サンプルデータ カタログ(DL URL / ライセンス) — 2-D は skimage.data(BSD/public)+ 合成、3-D は実データ源(Stanford/PDS 等)の DL URL。
• 演算子の来歴・参考文献 — この op 族の元になった研究/手法の出典。
• アルゴリズムの正典(著者・年)と用途は上記ファミリ使い方ガイドに記載。

実行できる例(この op を実際に呼ぶ検証済みサンプル)

• lightfield_depth — py -3.11 examples/lightfield_depth.py
• poc_compound_eye — py -3.11 examples/poc_compound_eye.py

型が繋がる次の op(image2d を入力に取れる)

lf_from_mla · lf_disparity_to_depth · lf_all_in_focus

同カテゴリ(refocus)

lf_refocus · lf_focal_stack · lf_synthetic_aperture

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Provenance: lightfield.py — LIGHTFIELD operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.

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