phase_deg — 2D `frequency` op

• Data kinds: image → image

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

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

Usage

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

複素画像の位相角マップ。`np.angle(F)（-π〜π）を (angle+π)/(2π)` で [0,1] に線形写像する。a, b は未使用。

名称は「度（degree）」を示唆するが、実装は phase_rad と同じ `_sh_freq の fft_phase 分岐を共有しており、度数法への変換は行っていない —— 返るのは [0,1] に正規化された角度で、実際の度数（0-360°）ではない。HALCON の phase_deg`（複素画像の位相を度単位で返す演算）の代役としては単位が違う近似である点に注意。

Detailed usage guide

• gallery2d_texture_freq 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_texture_freq — py -3.11 examples/gallery2d_texture_freq.py

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

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

Same category (`frequency`)

lowpass · highpass · sk_butterworth · fft_image · power_real · power_byte · phase_rad · highpass_image

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

phase_deg — 2D frequency op