# GPT Image Hub prompt

## Restauration et Mise à l'Échelle de Photos HD
- URL: https://www.gptimagehub.com/fr/library/photo-restoration-and-high-definition-upscale
- Generator URL: https://www.gptimagehub.com/fr/generate?promptId=oss-ym-g2-19634
- Markdown URL: https://www.gptimagehub.com/api/agent/markdown?path=%2Ffr%2Flibrary%2Fphoto-restoration-and-high-definition-upscale
- Category: Portrait et photographie
- Model: nanobanana2-lite
- Aspect ratio: 4:5
- Style: photorealistic
- Tags: restauration, mise à l'échelle, portrait, retouche photo, cinématographique, photoréaliste
- Updated: 2026-10-28T04:02:38.098Z
- Created: 2026-10-28T04:02:38.098Z

Restaure, nettoie et agrandit des portraits anciens ou dégradés tout en préservant le visage et le grain de peau d'origine. Ajustez la résolution et le débruitage.

### Full prompt
```text
{
  "task": "[image_restoration_upscale]",
  "positive_prompt": "Restore and enhance the reference photo. Strictly preserve original identity, facial structure, proportions, and composition. High-fidelity photo restoration, natural skin texture, accurate fine details, professional photographic finish. [4K] resolution output, sharp natural focus, subtle cinematic lighting, soft volumetric illumination, professional color grading, depth of field, HDR, Arri Alexa raw photo aesthetic.",
  "negative_prompt": "Creative reinterpretation, style change, identity alteration, face reshaping, exaggerated features, cartoonish, painting, illustration, over-sharpening, plastic skin, blur, noise, film grain, jpeg artifacts, distortion, bad anatomy, overexposed, underexposed, washed out colors.",
  "parameters": {
    "steps": 30,
    "cfg_scale": 6.5,
    "denoising_strength": 0.45,
    "upscaler": "4x_NMKD_Siax_200k",
    "target_resolution": "[4K]"
  }
}
```