28 lines
921 B
Markdown
28 lines
921 B
Markdown
---
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title: "负向提示词"
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type: concept
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tags: [ai, prompt, image-generation]
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---
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## Definition
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负向提示词（Negative Prompt）是一种明确指定 AI 生成过程中需要排除的特征或元素的提示词策略。
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## Mechanism
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在图像生成中，negatives 字段告诉模型"不要生成这些内容"：
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- 避免常见缺陷：blur、noise、watermark、logo
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- 排除不需要的元素：human hands、text、distortion
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- 控制风格纯度：no unrealistic lighting、no cartoon style
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## In Nano Banana Framework
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Nano Banana 的 negatives 字段是质量控制关键：
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```json
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"negatives": "no scratches, no dust, no logos or brand names, no human hands, blurry watch face"
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```
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## Why It Matters
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不写 negatives = 让 AI 自由发挥，容易混入不需要的元素。明确的 negatives = 质量门槛。
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## Connections
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- [[Nano Banana]] ← 框架实现
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- [[结构化提示词]] ← 上位概念
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