f2_gauss_pyramid — 2D `smoothing` op

• Data kinds: image → image

• Call: fullseye.apply(img, "f2_gauss_pyramid", a=0.5, b=0.5) (the 2-D model is one image plus two scalar knobs a,b∈[0,1])

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

Usage

Return one level of the image's Gauss pyramid, down-sampled by 2 `level times (blur + decimate) and then up-sampled back to the original HxW so the result is a band-limited (low-pass) version at reduced resolution. a selects the level (1..4); b` is ignored.

Detailed usage guide

• gallery2d_smoothing_rank 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_smoothing_rank — py -3.11 examples/gallery2d_smoothing_rank.py

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

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

Same category (`smoothing`)

gaussian · mean_box · bilateral · unsharp · sk_tv · sk_wavelet · sk_rolling_ball · sk_nlm

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

f2_gauss_pyramid — 2D smoothing op