xpil_emboss — 2D artistic op

• Data kinds: image → image

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

Usage

Pillow's emboss filter. Applies the fixed 3x3 kernel of `PIL.ImageFilter.EMBOSS` (a classic NPR filter that detects diagonal gradients and drops flat areas to mid-gray).

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

a, b は未使用（Pillow の `ImageFilter.EMBOSS` はパラメータを持たない固定カーネル）。

Detailed usage guide

• gallery2d_color_artistic 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_color_artistic — py -3.11 examples/gallery2d_color_artistic.py

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

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

Same category (artistic)

xcv_stylization · xcv_pencil_sketch

*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.