# GPT Image Hub prompt

## Chân Dung Đêm Thành Phố Dùng Đèn Flash
- URL: https://www.gptimagehub.com/vi/library/night-city-flash-portrait
- Generator URL: https://www.gptimagehub.com/vi/generate?promptId=oss-ym-mm-12593
- Markdown URL: https://www.gptimagehub.com/api/agent/markdown?path=%2Fvi%2Flibrary%2Fnight-city-flash-portrait
- Category: Chân dung và nhiếp ảnh
- Model: nanobananapro
- Aspect ratio: 4:5
- Style: photorealistic
- Tags: chụp ảnh flash, chân dung đêm, ánh đèn thành phố, phong cách sống, độ tương phản cao, đồng hồ sang trọng, bố cục trung tâm
- Updated: 2026-10-26T16:50:08.098Z
- Created: 2026-10-26T16:50:08.098Z

Tạo bức ảnh chân dung ban đêm độ tương phản cao với đèn flash trực tiếp trên nền ánh đèn thành phố. Tùy chỉnh mã màu hex, trang phục hoặc phong cảnh phía sau.

### Full prompt
```text
{
  "metadata": {
    "image_type": "photograph",
    "primary_purpose": "portrait/lifestyle"
  },
  "composition": {
    "rule_applied": "center composition",
    "aspect_ratio": "4:5",
    "layout": "single subject foreground with expansive deep background",
    "focal_points": [
      "Subject's brightly lit face and crisp white shirt",
      "Clasped hands displaying luxury watch",
      "Glowing band of city lights in the background"
    ],
    "visual_hierarchy": "Viewer eye starts at the smiling face, travels down the unbuttoned white shirt to clasped hands and watch, then moves outward to glowing city lights and mountain silhouette",
    "balance": "symmetric subject placement contrasted by slightly asymmetric background landscape"
  },
  "color_profile": {
    "dominant_colors": [
      {"color": "Deep Black/Navy", "hex": "#0D1117", "percentage": "55%", "role": "background night sky and suit jacket"},
      {"color": "Crisp White", "hex": "#FFFFFF", "percentage": "15%", "role": "primary subject shirt"},
      {"color": "Warm Skin Tone", "hex": "#C68767", "percentage": "15%", "role": "primary subject face and hands"},
      {"color": "Golden Yellow", "hex": "#F4C430", "percentage": "10%", "role": "accent city lights"}
    ],
    "color_palette": "complementary warm golden lights against cool dark blue/black shadows",
    "temperature": "warm foreground against cool dark background",
    "saturation": "moderate vivid skin tones and lights, deep desaturated shadows",
    "contrast": "high contrast"
  },
  "lighting": {
    "type": "mixed direct artificial flash on subject with ambient practical lights in background",
    "source_count": "single dominant front flash foreground, pinpoint ambient lights background",
    "direction": "front, slightly elevated",
    "quality": "hard light creating crisp shadows under chin, collar, and hands",
    "intensity": "bright on subject, low-key overall background",
    "contrast_ratio": "high contrast dramatic foreground isolation",
    "shadows": {
      "type": "harsh defined edges",
      "density": "deep black",
      "placement": "under chin, behind shirt collar, under hands, beneath lapels"
    },
    "highlights": {
      "treatment": "specular",
      "placement": "on nose tip, forehead, hair texture, and watch face"
    }
  },
  "technical_specs": {
    "medium": "digital photography",
    "style": "realistic lifestyle portrait",
    "texture": "glossy hair and watch contrasted with smooth fabric and skin",
    "sharpness": "tack sharp on subject",
    "grain": "subtle digital noise in deep background sky",
    "depth_of_field": "medium with crisp subject and distant visible city scape",
    "perspective": "eye-level"
  }
}
```