vx_histogram — VX pixel op

• Data kinds: image2d → pairs

• Call: import fullseye as fs; fs.ledger.vx_histogram(image, *, num_bins, offset, range_) (to call the implementation directly, import vxcore; vxcore.vx_histogram(image, *, num_bins, offset, range_); from the registry, opsvx.get("vx_histogram"))

Usage

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

ヒストグラム(3.26 節): 画素値 I は `i = (I − offset) × numBins / range` の升に入る(offset ≤ I < offset + range、REQ-0230)。

範囲外の画素は数えない。整数の割り算(切り捨て)で升を決める。

返り値 `(num_bins, 2)` の pairs: 列 0 = 升の下端の画素値(offset + i·range/numBins)、列 1 = 数。

Raises `ValueError`: U8 の 2-D でない / num_bins・range_ が正でない / num_bins > range_ / offset が負。

Detailed usage guide

• openvx_ports family guide

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)

• (none yet)

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

—

Same category (pixel)

vx_table_lookup


*Provenance: vxcore.py — VX 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.