scoop_count — DRIVE scoop op

• Data kinds: scalar × scalar × scalar → table

• Call: import fullseye as fs; fs.ledger.scoop_count(volume: 'float', radius: 'float', packing: 'float', *, density: 'float | None' = None) -> 'dict' (to call the implementation directly, import scoop; scoop.scoop_count(volume: 'float', radius: 'float', packing: 'float', *, density: 'float | None' = None) -> 'dict'; from the registry, opsdrive.get("scoop_count"))

Usage

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

体積と充填率から粒の数 `N = V ν / ((4/3) π r³)(density を与えれば質量 N m_p とかさ密度 ν ρ_p`)。

`packing ν は **較正値**(同じ粒・同じ測り方で、数の分かった 1 回から N v_p / V_img` を取る): 側面の輪郭は

粒の外側の包絡なので、ν は充填そのものより小さく出る(包絡の分の体積を含む)。

Raises `ValueError`: 体積 < 0、半径 ≤ 0、ν が (0, 1] の外。

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_image_limit · tilt_wedge_retained · tilt_pour_rate

*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.