极简矢量海报转换

A complex, structured prompt for Nano Banana Pro designed to transform an existing image into a clean, minimalist vector-style poster. It mandates geometric simplification, a restricted color palette (3–6 colors, no gradients), flat lighting, and the preservation of essential identity while removing all photorealistic details and textures. This prompt requires an input image to be transformed.

{
  "task": "将提供的图片转换为最小矢量风格的海报。",
  "style": {
    "overall_look": "平面设计、几何简化、最小矢量艺术",
    "color_palette": {
      "type": "受限",
      "description": "使用3-6种和谐颜色的简化色板，具有清晰的色调分离且无渐层。",
      "constraints": [
        "无照片级渲染",
        "无质感或噪点",
        "避免过度细节"
      ]
    },
    "shapes": {
      "treatment": "将所有形式简化为基本的几何轮廓和实心形状。",
      "linework": "使用干净、等重线条艺术，或根据海报连贯性选择无轮廓。",
      "abstraction_level": "高，但不要高到使主题无法识别。"
    },
    "lighting": {
      "handling": "移除真实感照明。用简化的色块替换阴影和高光，或完全省略。",
      "allowed_effects": [
        "硬边阴影形状",
        "细微色调区域"
      ],
      "forbidden_effects": [
        "柔和阴影",
        "复杂反射",
        "照片级高光"
      ]
    }
  },
  "subject_preservation": {
    "identity": "通过轮廓、比例、关键面部地标和基本特征保持可识别的身份。",
    "proportions": "保持身体、头部和主要元素的准确相对比例。",
    "essential_details": [
      "仅定义识别所需的最重要特征。",
      "移除细微质感、头发丝、毛孔和小型衣物细节。"
    ]
  },
  "composition": {
    "framing": "除非另有说明，否则匹配原始构图。",
    "background": {
      "treatment": "简化为1-2个大型平面色域或抽象几何形状。",
      "forbidden_details": [
        "真实质感",
        "复杂场景",
        "照片级景深"
      ]
    },
    "hierarchy": "主题应保持为焦点，背景作为支持性的最小结构。"
  },
  "color_and_balance": {
    "poster_aesthetic": "高清晰度、大胆对比和可读的轮廓。",
    "white_balance": "中性；避免温暖或冷色的照片级偏移。",
    "edge_integrity": "所有边缘必须清晰、干净且一致风格化。"
  },
  "output_requirements": {
    "format": "平面、海报般的矢量外观（但光栅输出可接受）。",
    "resolution": "匹配原始图片分辨率，除非另有指示。",
    "consistency": "无添加文本、标志、浮水印或原始中不存在的元素。"
  },
  "prohibited_changes": [
    "不要更改身份。",
    "不要添加新对象或移除必要对象。",
    "不要使用与最小矢量美学相矛盾的风格化（例如，绘画笔触、渐层、3D阴影）。"
  ],
  "goal_summary": "创建一个干净、最小矢量风格的原始图片解释，保留轮廓、比例和基本身份，同时移除所有非必要细节和真实感照明提示。"
}

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