halcon_ext op• Data kinds: region → region
• Call: fullseye.apply(img, "hx_dilation2", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])
• HALCON equivalent: dilation2 (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.*
Sweeping knob a (0.1 / 0.5 / 0.9, the other knob at its default):
▸ hx_dilation2: knob a sweep (docs site)
Sweeping knob b (0.1 / 0.5 / 0.9, the other knob at its default):
▸ hx_dilation2: knob b sweep (docs site)
Stages (the ops that come before → this op, left to right):
▸ hx_dilation2: stages (docs site)
On other images (synthetic scene / photo / coins. Top row: inputs, bottom row: their outputs. Knobs at default):
▸ hx_dilation2: other inputs (docs site)
Dilation with a reference point: after dilating, offset by the reference point (translated by b).
> The detailed description below is the original text — the summary and the headings are translated.
`v > 0.5 を region とし、半径 r の円板構造要素で binary_dilation した後、結果を列方向に sh` 画素
`np.roll` で平行移動して 0/1 の float 配列で返す。
• `a → 円板半径 r = 1 + int(a*4)`(1〜5 画素)。
• `b → 列方向のずらし量 sh = int((b-0.5)*6)。値は -3〜3 で、小数点以下は 0 方向に切り捨てるため b` が
およそ 1/3〜2/3 の範囲では 0(ずらし無し)になる。負で左、正で右。
行方向のずらしは無い(参照点を横にずらす形だけを再現)。`np.roll` なので端からはみ出た分は反対側に現れる
(端に接する region を扱うときは注意)。単純な膨張だけなら `hx_dilation1`。
• 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_dilation2 0.50 0.50
▸ Load this pipeline · Load & run
• gallery2d_halcon_ext — py -3.11 examples/gallery2d_halcon_ext.py
region as input)identity · reg_erode · reg_dilate · reg_open · reg_close · fill_holes · select_largest · remove_small
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.