hx_gen_highpass — 2D `halcon_ext` op

• Data kinds: image → image

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

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

Usage

Generates the frequency mask of an ideal high-pass filter. Corresponds to HALCON's `gen_highpass` (generates an ideal high-pass filter).

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

DC を中心に fftshift した正規化周波数半径 `r を計算し、r > cutoff` の

画素を 1 とする(`cutoff = 0.05 + 0.45*a)。兄弟 op hx_gen_lowpass` /

`hx_gen_bandpass と半径の計算式を共有する。b` は未使用。返り値は

フィルタそのもの(周波数領域のマスク画像)で、画像に畳み込む前段にあたる。

Detailed usage guide

• gallery2d_halcon_ext 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)

• gallery2d_halcon_ext — py -3.11 examples/gallery2d_halcon_ext.py

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

identity · gaussian · mean_box · bilateral · unsharp · median · min_filter · max_filter

Same category (`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).*

hx_gen_highpass — 2D halcon_ext op