README.md

metadata

title: OpenHTR-Gen
emoji: ✍️
colorFrom: red
colorTo: yellow
sdk: gradio
sdk_version: 5.35.0
app_file: app.py
pinned: false
license: other
short_description: Rewrite any handwritten region in the page's style
models:
  - black-forest-labs/FLUX.1-Fill-dev
  - OpenHTR/OpenHTR-Gen-LoRA
tags:
  - spaces
  - zero-gpu
  - handwriting
  - flux
  - text-rendering

OpenHTR-Gen

English | 中文

Rewrite a region of a Chinese handwritten page in its own handwriting style.

Upload a full-page Chinese handwriting scan, draw a box over the text you want to change, and type the new text. OpenHTR-Gen re-renders that region so the strokes, ink and paper match the rest of the page, then returns the generated crop.

How to use

1. Upload a full-page handwriting image.
2. Select the region. Use the brush to trace around the text (or paint over it) — the box is the bounding box of your strokes. Brush size and colour are in the editor toolbar.
3. Type the new text (up to 35 characters).
4. Click Generate. You get the edited crop, plus a preview of the whole page with the result pasted back in.

Settings

Control	Default	What it does
Inference steps	20	More steps → more detail, slower
guidance_scale	30	How strongly the new characters are followed
Seed	-1	-1 = random; fix it to reproduce a result
Crop padding	0	Margin around the output crop
Selection padding	4 px	Expands the detected box
x0 / y0 / x1 / y1	0	Manual box in image pixels; overrides the brush

Tips

• Leave a little vertical space inside the box so the new text can blend with neighbouring strokes.
• A generous outline or a filled-in stroke works better than a hairline rectangle.
• If a result looks off, fix nothing but the seed and try again.

Notes

• Generation is probabilistic — an occasional garbled character is expected.
• Very large pages work, but editing them in the browser may feel slow.
• FLUX.1 [dev] is released under a non-commercial license. Do not use this demo or its outputs commercially.