halcon_ext op• Data kinds: region → feature
• Call: fullseye.apply(img, "hx_test_region_point", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: test_region_point (the HALCON reference is a useful guide to its meaning and parameters)
*The figure is the actual output on a synthetic 128×128 input. Left: input, right: output. Point clouds are drawn as a top-down scatter (brightness = z), 1-D series as a line plot, volumes as the maximum-intensity projection along z, videos as the middle frame, complex images as magnitude; return values that are not pictures are shown as the values themselves.*
*Knob a does not change the output (measured: identical at 0.1 / 0.5 / 0.9).*
Sweeping knob b (0.1 / 0.5 / 0.9, the other knob at its default):
▸ hx_test_region_point: knob b sweep (docs site)
Stages (the ops that come before → this op, left to right):
▸ hx_test_region_point: stages (docs site)
Whether the region contains the point (normalised a = row, b = column): 1/0 (test_region_point).
> The detailed description below is the original text — the summary and the headings are translated.
`v > 0.5 の region が、正規化座標 (a, b) の画素を含むかを 1.0/0.0 の np.float64` で返す。
• `a → 行 r = min(int(a*h), h-1)`(0 で先頭行、1 で最終行)。
• `b → 列 c = min(int(b*w), w-1)`。
座標は (行, 列) 順で、切り捨てで画素に丸める。1 画素の判定なので region の縁ぎりぎりでは不安定になる。
点の周辺で判定したいときは先に `hx_dilation1` で region を太らせる。複数点の包含率は
`hx_test_region_points、点から region までの距離は hx_distance_pr`。
• gallery2d_halcon_ext family guide
• 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.
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.
threshold 0.50 0.50 hx_test_region_point 0.50 0.50
▸ Load this pipeline · Load & run
• gallery2d_halcon_ext — py -3.11 examples/gallery2d_halcon_ext.py
feature as input)halcon_ext)hx_gen_circle · hx_gen_ellipse · hx_gen_rectangle2 · hx_gen_checker_region · hx_gen_grid_region · hx_gabor · hx_fit_surface1 · hx_fit_surface2
*Provenance: ops.py — 2D 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.