Hướng dẫn chi tiết để phục hồi ảnh cũ bằng GPT Image 1.5

```json
{
  "task": "portrait_restoration",
  "language": "zh-CN",
  "prompt": {
    "subject": {
      "type": "human_portrait",
      "identity_fidelity": "match_uploaded_face_100_percent",
      "no_facial_modification": true,
      "expression": "natural",
      "eye_detail": "sharp_clear",
      "skin_texture": "ultra_realistic",
      "hair_detail": "natural_individual_strands",
      "fabric_detail": "rich_high_frequency_detail"
    },
    "lighting": {
      "exposure": "bright_clear",
      "style": "soft_studio_light",
      "brightness_balance": "even",
      "specular_highlights": "natural_on_face_and_eyes",
      "shadow_transition": "smooth_gradual"
    },
    "image_quality": {
      "resolution": "8k",
      "clarity": "high",
      "noise": "clean_low",
      "artifacts": "none",
      "over_smoothing": "none"
    },
    "optics": {
      "camera_style": "full_frame_dslr",
      "lens": "85mm",
      "aperture": "f/1.8",
      "depth_of_field": "soft_shallow",
      "bokeh": "smooth_natural"
    },
    "background": {
      "style": "clean_elegant",
      "distraction_free": true,
      "tone": "neutral"
    },
    "color_grading": {
      "style": "cinematic",
      "saturation": "rich_but_natural",
      "white_balance": "accurate",
      "skin_tone": "natural_true_to_subject"
    },
    "style_constraints": {
      "no_cartoon": true,
      "no_beauty_filter": true,
      "no_plastic_skin": true,
      "no_face_reshaping": true,
      "no_ai_face_swap": true
    }
  },
  "negative_prompt": [
    "cartoon",
    "anime",
    "cgi",
    "painterly",
    "plastic skin",
    "over-smoothing",
    "over-sharpening halos",
    "heavy skin retouching",
    "face reshaping",
    "identity drift",
    "face swap",
    "beauty filter",
    "uncanny",
    "washed out",
    "color cast",
    "blown highlights",
    "crushed shadows",
    "banding",
    "jpeg artifacts",
    "extra fingers",
    "deformed eyes",
    "asymmetrical face",
    "warped features"
  ],
  "parameters": {
    "fidelity_priority": "identity",
    "detail_priority": "eyes_skin_hair_fabric",
    "realism_strength": 0.95,
    "sharpening": "micro_contrast_only",
    "skin_retention": "keep_pores_and_microtexture",
    "recommended_denoise": "low_to_medium"
  }
}
```