hx_fill_interlace — 2D `halcon_ext` op

• Data kinds: image → image

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

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

hx_fill_interlace: input → output

*The figure is the actual output on a synthetic 128×128 input. Left: input, right: output. Point clouds are drawn as a top-down scatter (brightness = z), 1-D series as a line plot, volumes as the maximum-intensity projection along z, videos as the middle frame, complex images as magnitude; return values that are not pictures are shown as the values themselves.*

*Knob a does not change the output (measured: identical at 0.1 / 0.5 / 0.9).*

*Knob b does not change the output (measured: identical at 0.1 / 0.5 / 0.9).*

On other images (synthetic scene / photo / coins. Top row: inputs, bottom row: their outputs. Knobs at default):

▸ hx_fill_interlace: other inputs (docs site)

*The 4th column is a colour (H,W,3) input. This op handles colour without crossing channels (it does not convolve the colour channel as a third spatial axis).*

Usage

Interpolate two video half-frames (replace the odd rows by the mean of the adjacent even rows = de-interlacing).

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

1 枚の画像を奇数行・偶数行の 2 フィールドとみなし、奇数行(`1::2`)を上下の隣接行の平均

`0.5*(v[i-1] + v[i+1])` で置き換える。偶数行はそのまま。出力は入力と同形の float 画像。

• `a, b` は未使用。

• 上下の行は `np.roll` で取るため、高さが偶数のとき最終行(奇数行)の「下」は先頭行になる(端 1 行だけ循環)。

インターレース映像の櫛状ずれを消す最も単純な線形補間で、奇数フィールドの情報は捨てられる(縦の解像度は

半分に落ちる)。どちらのフィールドを残すかは選べない(常に偶数行が生き残る)。行方向の縞が疑われるときの

前処理として、`hx_nonmax_dir` など微分系 op の前に置く。

Border handling: wrap around to the opposite side (periodic) (measured; tools/impl2/border_probe.py).

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.

Try it in Studio

The program below has been verified to run (same input as the figure). In Studio's help this block becomes buttons that load and run it on the spot.

hx_fill_interlace 0.50 0.50

▸ Load this pipeline · Load & run

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_fill_interlace — 2D halcon_ext op