refocus op• 数据种类:lightfield → image2d
• 调用: import fullseye as fs; fs.ledger.lf_refocus(lf, slope=0.0, *, interp='linear', edge='nearest')(要直接调用实现,import lightfield; lightfield.lf_refocus(lf, slope=0.0, *, interp='linear', edge='nearest');从台账取用则 opslightfield.get("lf_refocus"))
移位相加重聚焦:聚焦在 *slope* 上的合成孔径图像。
> 以下的详细说明为原文 —— 摘要与标题已翻译。
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*.
• 示例数据目录(下载 URL / 许可证) —— 2-D 用 skimage.data(BSD/公有领域)加合成图,3-D 给出真实数据源(Stanford/PDS 等)的下载 URL。
• 算子来历与参考文献 —— 该算子族所依据的研究/方法出处。
• 算法的正典(作者、年份)与用途见上面的族使用指南。
• lightfield_depth — py -3.11 examples/lightfield_depth.py
• poc_lightfield_depth — py -3.11 examples/poc_lightfield_depth.py
image2d 作为输入)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 算子登记表。本条目由 tools/opdocs.py md 自动生成(请勿手工编辑)。*
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.