stream_synth — DRIVE scoop op

• Data kinds: scalar × scalar × scalar → table

• Call: import fullseye as fs; fs.ledger.stream_synth(flux: 'float', radius: 'float', width: 'float', *, v0: 'float' = 0.3, s0: 'float' = 0.02, rows: 'int' = 192, cols: 'int' = 64, pitch: 'float' = 0.0005, dt: 'float' = 0.0015, n_frames: 'int' = 16, supersample: 'int' = 4, seed: 'int | None' = 0) -> 'dict' (to call the implementation directly, import scoop; scoop.stream_synth(flux: 'float', radius: 'float', width: 'float', *, v0: 'float' = 0.3, s0: 'float' = 0.02, rows: 'int' = 192, cols: 'int' = 64, pitch: 'float' = 0.0005, dt: 'float' = 0.0015, n_frames: 'int' = 16, supersample: 'int' = 4, seed: 'int | None' = 0) -> 'dict'; from the registry, opsdrive.get("stream_synth"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

口から落ちる粉の流れ(横から見た薄い帯)の被覆率のコマ列を合成する。

粒は Poisson 過程(率 `flux [個/s])で口を離れ、横位置は幅 width に一様、初速 v0` で自由落下

`s = v₀ τ + ½ g τ²(口からの落下距離 s)。画像の行 0 は s = s0、1 画素 pitch。半径 radius` の円板の和

(副標本 `supersample`² の被覆率)。位置が独立なので被覆率は Boolean 模型に従う —— 合成器はその式を使わない

(:func:stream_areal_density の独立な被験者)。

返り: `frames(n_frames 枚)、dt、pitch、s_rows(行中心の落下距離)、truth(flux`、

`crossings(行中心の各高さを [0, n_frames·dt) に横切った実数の個数 / 時間 = 実現した流量)、v`(行中心の

自由落下の速さ)、`radius_px)。**Raises** ValueError`: 引数の範囲。

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)

• poc_powder_scoop_pour — py -3.11 examples/poc_powder_scoop_pour.py

Ops the type connects to (they accept table as input)

course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same

Same category (scoop)

spoon_bowl_volume · scoop_synth_side · revolution_volume_side · two_view_volume · scoop_volume_read · scoop_count · scoop_image_limit · tilt_wedge_retained

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

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