# GPT Image Hub prompt

## Khóa Kỹ Thuật Thay Thế Danh Tính Chuẩn Xác
- URL: https://www.gptimagehub.com/vi/library/precision-identity-swap-technical-lock
- Generator URL: https://www.gptimagehub.com/vi/generate?promptId=oss-ym-mm-3838
- Markdown URL: https://www.gptimagehub.com/api/agent/markdown?path=%2Fvi%2Flibrary%2Fprecision-identity-swap-technical-lock
- Category: Chân dung và nhiếp ảnh
- Model: nanobananapro
- Aspect ratio: 2:3
- Style: photorealistic
- Tags: thay the danh tinh, doi mat, prompt json, chup anh thuc te, chan dung, khoa may anh
- Updated: 2026-10-28T05:26:03.098Z
- Created: 2026-10-28T05:26:03.098Z

Prompt JSON cấu trúc cao giúp hoán đổi danh tính chuẩn xác từng pixel mà vẫn giữ nguyên bố cục, ánh sáng và tư thế. Tùy chỉnh khung bounding box và thông số máy ảnh theo ảnh gốc của bạn.

### Full prompt
```text
{
  "metadata": {
    "engine_name": "PX-LOCK-X",
    "prompt_version": "pxlockx-1.0.0",
    "generation_goal": "Near pixel-perfect recreation with identity-only replacement",
    "reference_frame_policy": {
      "use_reference_as_ground_truth": true,
      "identity_swap_only": true,
      "no_creative_inference": true
    },
    "units": {
      "angles": "degrees",
      "lengths": "centimeters",
      "coords": "normalized_0_to_1",
      "temperature": "kelvin"
    }
  },
  "identity_replacement": {
    "mode": "identity_only",
    "reference_identity_source": "[uploaded subject reference photo]",
    "replace": {
      "face_identity": true,
      "head_shape": true,
      "hair_color_and_length": true,
      "skin_tone": true,
      "body_identity": true
    },
    "preserve_from_reference": {
      "pose": true,
      "camera": true,
      "lighting": true,
      "environment": true,
      "wardrobe": true,
      "jewelry": true,
      "expression_valence": true,
      "framing_and_crop": true
    },
    "identity_strength": 1.0,
    "no_beautification": true,
    "no_style_transfer": true
  },
  "output_settings": {
    "aspect_ratio": "2:3",
    "resolution_target": "reference_matched",
    "render_style": "photorealistic",
    "color_space": "sRGB",
    "compression": "lossless",
    "dynamic_range": "natural",
    "white_balance_lock": true
  },
  "pixel_coordinates_lock": {
    "lock_enabled": true,
    "reference_frame_dimensions_px_estimate": {
      "width_px": 1024,
      "height_px": 1536
    },
    "crop_boundaries_px_norm": {
      "left_x_norm": 0.0,
      "right_x_norm": 1.0,
      "top_y_norm": 0.0,
      "bottom_y_norm": 1.0
    },
    "primary_subject_bounding_box_norm": {
      "x_min": 0.105,
      "y_min": 0.155,
      "x_max": 0.945,
      "y_max": 0.975
    },
    "head_bounding_box_norm": {
      "x_min": 0.205,
      "y_min": 0.175,
      "x_max": 0.625,
      "y_max": 0.360
    },
    "face_feature_anchors_norm": {
      "left_eye_center": { "x": 0.345, "y": 0.252 },
      "right_eye_center": { "x": 0.445, "y": 0.247 },
      "nose_tip": { "x": 0.405, "y": 0.287 },
      "mouth_center": { "x": 0.403, "y": 0.318 },
      "chin_point": { "x": 0.410, "y": 0.352 }
    }
  },
  "camera_lock": {
    "lock_enabled": true,
    "camera_height_cm": 105.0,
    "camera_to_subject_distance_cm": 230.0,
    "camera_orientation_degrees": {
      "yaw": 8.5,
      "pitch": -3.0,
      "roll": 0.6
    },
    "lens": {
      "focal_length_mm": 85.0,
      "sensor_format": "full_frame",
      "distortion_model": "brown_conrady",
      "distortion_coefficients": { "k1": -0.012, "k2": 0.004 }
    },
    "aperture": {
      "f_number": 2.2,
      "focus_distance_cm": 220.0,
      "focus_target": "face_plane"
    },
    "exposure": {
      "iso": 200,
      "shutter_s": 0.002,
      "exposure_comp_ev": 0.0
    }
  },
  "pose_lock": {
    "lock_enabled": true,
    "pose_type": "[deep_squat_crouch]",
    "body_facing_angle_deg": 15.0
  }
}
```