Lineart Extraction & Coloring: Speed up your art pipeline

What it does

Extract crisp lineart from a color illustration, or color existing lineart following a given palette. Great for downstream inking, variant exploration, or rapid color studies.

Steps

  1. Prepare inputs: a color illustration to extract lineart from, or a lineart plus a palette reference.
  2. Upload to Nano Banana.
  3. Provide a prompt that states “extract lineart” or “color lineart” and any style constraints.
  4. Generate and iterate.

Prompt (English) — Extract lineart

Extract a clean black and white line art from this illustration. Ensure all original details are preserved and the background is pure white. Style: clean, high‑contrast line drawing.

Illustration → lineart

Prompt (English) — Color lineart

Color the line art in the second image strictly following the color palette provided in the first image. Keep the line art intact and apply colors smoothly to create a cohesive, anime‑style illustration.

Palette → colored art

Tips

  • Be explicit about “preserve all original details” and “keep lineart intact.”
  • Add style notes like “anime‑style, smooth shading” to match output expectations.

Value

  • Simplifies inking and color testing in professional pipelines.
  • Rapidly compare palettes without repainting from scratch.
  • Lowers the skill barrier for coloring while keeping authorial control.

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