m1_measure_pos — 2D `measure1d` op

• Data kinds: image → contour

• Call: fullseye.apply(img, "m1_measure_pos", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

• HALCON equivalent: measure_pos (the HALCON reference is a useful guide to its meaning and parameters)

m1_measure_pos: 入力 → 出力

*The figure is the real output on a synthetic 128×128 input. Left: input, right: output (a non-image return value is shown as the value itself).*

Usage

Extracts sub-pixel edge positions along a caliper line through the centre (equivalent to HALCON `measure_pos`: detects straight edges perpendicular to a rectangle/arc).

> The detailed description below is the original text — the summary and the headings are translated.

線は画像中心を通り、`a で向きを theta = a*pi に振る。輝度プロファイルをガウシアンで軽く平滑化してから |d/ds gray| のピークをサブピクセル（3 点放物線補間）で検出し、b（0〜1）を最大振幅に対する相対しきい値として弱いエッジを捨てる。戻り値は CONTOUR（{"shape": (H,W), "cs": [1x2 の (row, col) 点, ...]}）、座標単位は入力画像のピクセル。主な使い道はエッジ数を count_contours`で数えること。

Detailed usage guide

• gallery2d_contour_measure family guide

Background guides (the physics and conventions behind this op)

• measurement_uncertainty — 計測の不確かさと校正の知識 — 「測れている」を主張するために

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.

Try it in Studio

The program below has been verified to run (same input as the figure). In Studio's help this block becomes buttons that load and run it on the spot.

m1_measure_pos 0.50 0.50

▸ Load this pipeline · Load & run

Runnable examples (verified samples that actually call this op)

• gallery2d_contour_measure — py -3.11 examples/gallery2d_contour_measure.py

• poc_dimensional_inspection — py -3.11 examples/poc_dimensional_inspection.py

Ops the type connects to (they accept `contour` as input)

identity · select_contours · smooth_contours · fit_line_contours · contours_to_region · count_contours · total_length · select_contours_xld

Same category (`measure1d`)

m1_measure_projection · m1_measure_thresh · m1_measure_pairs · m1_fuzzy_measure_pos

*Provenance: ops.py — 2D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

m1_measure_pos — 2D measure1d op