typed oplightfield → imagefullseye.apply(img, "tb_lf_refocus", a=0.5, b=0.5) (2-D は 1 画像 + 2 スカラつまみ a,b∈[0,1] のモデル)
図は合成の入力 128×128 で実際に走らせた出力。左が入力、右が出力。点群は上から見た散布(明るさ = z)、1-D 列は折れ線、体積は z 方向の最大値投影、動画は中央フレーム、複素画像は振幅、絵にならない返り値は値そのもの。
つまみ a は出力を変えない(実測: 0.1 / 0.5 / 0.9 で同一)。
つまみ b は出力を変えない(実測: 0.1 / 0.5 / 0.9 で同一)。
段階(前置きの op → この op。左から順):

別の画像でも(合成シーン / 写真 / 硬貨。上段が入力、下段がその出力。つまみは既定):

Shift-and-add refocus: the synthetic-aperture image focused at slope.
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 (:data:MAX_ABS_SLOPE), unknown interp / edge.
Typed bridge of the lightfield op lf_refocus into the 2-D evolution registry: the same implementation, called under the op(v, a, b) convention. This op has no tunable parameter; a and b are unused.
下のプログラムは実際に走ることを確かめてある(図と同じ入力)。Studio のヘルプではこのブロックがボタンになり、その場で読み込んで実行できる。
img_to_lightfield 0.50 0.50
tb_lf_refocus 0.50 0.50
次の例は元の台帳 op lf_refocus を呼ぶもの。この橋渡し op は同じ実装を fn(v, a, b) 規約に合わせただけなので、挙動はそのまま当てはまる(呼び出し形だけ違う)。
py -3.11 examples/lightfield_depth.pypy -3.11 examples/plenoptic_decode_pipeline.pypy -3.11 examples/poc_lightfield_depth.pypy -3.11 examples/poc_plenoptic_camera.pyimage を入力に取れる)identity · gaussian · mean_box · mean_box_wh · bilateral · kuwahara · unsharp · median
typed)tb_points_to_voxel · tb_estimate_point_normals · tb_iss_keypoints · tb_project_points · tb_render_point_depth · tb_points_render · tb_statistical_outlier_removal · tb_radius_outlier_removal
Provenance: ops.py — 2D 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.