refocus op• 資料種類:lightfield → image2d
• 呼叫: import fullseye as fs; fs.ledger.lf_refocus(lf, slope=0.0, *, interp='linear', edge='nearest')(要直接呼叫實作,import lightfield; lightfield.lf_refocus(lf, slope=0.0, *, interp='linear', edge='nearest');從台帳取用則 opslightfield.get("lf_refocus"))
移位相加重聚焦:聚焦在 *slope* 上的合成孔徑影像。
> 以下的詳細說明為原文 —— 摘要與標題已翻譯。
Every view (v, u) is shifted by (-s*(v - v_c), -s*(u - u_c)) — the minus undoes the parallax of a point at slope s — and the shifted views are averaged. Points at that slope add coherently and stay sharp; everything else is smeared by an amount proportional to its slope difference times the angular baseline. slope=0 is the plane the array was already focused on and returns the plain average of the views.
Ground truth it reproduces exactly (pinned in tests/test_lightfield.py):
a single-layer field synthesised at slope s0 and refocused at s0 with edge="wrap" and an integer s0 returns the original texture to 5.6e-16; sweeping the slope, the variance of the result peaks at s0 (measured exactly on the sweep grid in all 18 texture/slope combinations listed in the module docstring), and refocusing at -s0 does *not* — which is the check that catches a flipped shift sign.
Returns a (H, W) 2-D image.
Raises ValueError: *lf* not a valid light field, a non-finite or over-large *slope* (MAX_ABS_SLOPE), unknown *interp* / *edge*.
• 範例資料目錄(下載 URL / 授權) —— 2-D 用 skimage.data(BSD/公有領域)加合成圖,3-D 給出真實資料源(Stanford/PDS 等)的下載 URL。
• 運算子來歷與參考文獻 —— 該運算子族所依據的研究/方法出處。
• 演算法的正典(作者、年份)與用途見上面的族使用指南。
• lightfield_depth — py -3.11 examples/lightfield_depth.py
• poc_lightfield_depth — py -3.11 examples/poc_lightfield_depth.py
image2d 作為輸入)lf_from_mla · lf_disparity_to_depth · lf_all_in_focus
refocus)lf_focal_stack · lf_aperture_mask · lf_synthetic_aperture
*Provenance: lightfield.py — LIGHTFIELD 運算子登記表。本條目由 tools/opdocs.py md 自動產生(請勿手動編輯)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.