morph — SHAPE2D morph op

• Data kinds: image2d × image2d × pairs × pairs → image2d

• Call: import imagemorph; imagemorph.morph(imgA, imgB, ptsA, ptsB, alpha, method='affine', lam=0.0, with_corners=True) (or opsshape2d.get("morph"))

Usage

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

2 枚の画像 A, B を対応点でモーフし、比率 alpha の中間画像を作る。

手順(Beier–Neely 流のメッシュ・モーフ):

1. 中間形状 mid = (1-alpha)·ptsA + alpha·ptsB を作る。

2. A を ptsA→mid へ、B を ptsB→mid へワープ(両者の特徴を mid に揃える)。

3. warp(A), warp(B) を alpha でクロスディゾルブ。

alpha=0 で A、alpha=1 で B に一致する。単純な blend(A,B,alpha) と違い、

目・鼻などの特徴が二重像にならず 1 つに重なる(=「本物の中間」)。

引数:

imgA, imgB: (H,W[,C])、同 shape、[0,1]。

ptsA, ptsB: (K,2) の (x,y)。A と B の対応点(同数・同順)。

alpha: 合成比率 [0,1]。

method: "affine"(区分アフィン, 速い)か "tps"(滑らか)。

lam: TPS の平滑化係数(method="tps" のとき)。

with_corners: True で四隅を固定点に足し、端の穴を防ぐ。

返り値: (H,W[,C]) の中間画像([0,1])。

Detailed usage guide

• shape_description_2d 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)

• image_morph — py -3.11 examples/image_morph.py

Ops the type connects to (they accept image2d as input)

warp_tps_image · warp_piecewise_affine · blend · morph_sequence

Same category (morph)

add_frame_corners · warp_tps_image · warp_piecewise_affine · blend · morph_sequence

*Provenance: imagemorph.py — SHAPE2D 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.