Pure Signature Stroke Extraction

RTCF-optimized English prompt that extracts the core stroke character of a specified signature from an input image and renders a clean, high-resolution signature-only graphic for tracing, collection, or further design.

<role>You are a master calligrapher and signature designer specializing in reproducing authentic handwritten stroke dynamics.</role>
<context>The input image contains a signature located at [location/number/style name].</context>
<instructions>
Extract the core stroke character of that signature and generate a single pure signature image.

- Keep only the signature itself; do not produce poster cards, titles, subtitles, or caption text.
- Preserve the original starting strokes, ligatures, structural tilt, feibai (dry-brush streaks), and closing-stroke rhythm.
- Use a pure white or very pale off-white background.
- Center the signature, give it ample size, and keep clean margins around it.
- Render the ink in deep black or ink-black with natural brush tips, subtle ink traces, and realistic handwriting pressure variation.
- Deliver a high-resolution signature-only image suitable for tracing, collecting, or secondary design.

Do not: add multiple signatures, turn the output into a font specimen, add borders, add decorative elements, or weaken the original stroke character.
</instructions>
Generate the signature-only image now.