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Image Generation

image_generation

AI图像生成与编辑能力,基于 Nano Banana (Gemini Image) 实现文生图、图生图、图像编辑。适用于创意设计、营销素材、社交媒体内容、演示文稿配图等场景。支持多种风格、高分辨率输出(最高4K)、文字渲染、角色一致性保持。

SKILL.md

Full skill instructions

能力概述

AI图像生成能力让你能够:

  • 文生图:根据文字描述生成图像
  • 图生图:基于参考图像生成新图像
  • 图像编辑:修改现有图像的特定部分
  • 风格转换:改变图像风格(写实、动漫、油画等)
  • 文字渲染:在图像中生成清晰可读的文字

底层基于 Google Gemini 的 Nano Banana / Nano Banana Pro 模型。

工作流程

Phase 1: 需求理解

  1. 理解用户的图像需求(主题、风格、用途)
  2. 确认输出格式(尺寸、分辨率、数量)
  3. 如有参考图,确认编辑意图

Phase 2: Prompt 构建

  1. 将用户意图转化为英文 Prompt(效果更好)
  2. 遵循 Prompt 公式:<subject> <action> <scene> <style> <quality>
  3. 补充必要的细节描述

Phase 3: 图像生成

  1. 调用 generate_image 工具
  2. 如需编辑,调用 edit_image 工具
  3. 生成多个候选(如用户需要选择)

Phase 4: 交付

  1. 展示生成结果
  2. 询问是否需要调整
  3. 保存到用户指定位置

工具使用

generate_image

  • 用途:根据文字描述生成图像
  • 参数:
    • prompt: 图像描述(英文效果更佳)
    • style: 风格预设(realistic, anime, oil_painting, watercolor, minimal, cinematic)
    • aspect_ratio: 宽高比(1:1, 16:9, 9:16, 4:3, 3:4)
    • resolution: 分辨率(1K, 2K, 4K)
    • num_images: 生成数量(1-4)
  • 示例:
    generate_image(
        prompt="A majestic horse galloping through cherry blossoms, golden hour lighting, Chinese New Year festive atmosphere",
        style="realistic",
        aspect_ratio="16:9",
        resolution="2K",
        num_images=2
    )
    

edit_image

  • 用途:编辑现有图像
  • 参数:
    • image_path: 原图路径或URL
    • prompt: 编辑指令(如:"将背景改为夜景")
    • preserve_subject: 是否保持主体不变(默认True)
  • 示例:
    edit_image(
        image_path="/​workspace/​photo.jpg",
        prompt="Add Chinese New Year decorations and red lanterns to the background",
        preserve_subject=True
    )
    

Prompt 最佳实践

基础公式

[主体] + [动作/姿态] + [场景/背景] + [风格] + [氛围/光线]

风格关键词

  • 写实:photorealistic, hyperrealistic, 8K, detailed
  • 动漫:anime style, Ghibli style, cel shading
  • 油画:oil painting style, impressionist, Van Gogh style
  • 极简:minimal, flat design, vector art
  • 电影感:cinematic, dramatic lighting, movie poster style

质量增强词

  • high quality, detailed, sharp focus
  • professional photography, award winning
  • 4K resolution, ultra detailed

避免事项

  • ❌ 避免模糊描述:"一张好看的图"
  • ❌ 避免矛盾描述:"写实风格的卡通"
  • ❌ 避免敏感内容
  • ✅ 具体、清晰、有层次

应用场景模板

场景1:微信红包封面/节日祝福图

prompt_template: |
  A {animal} in {pose}, surrounded by {decorations}, 
  Chinese New Year theme, festive red and gold colors, 
  {style} style, high quality, {text_content}
  
variables:
  animal: "majestic horse" # 马年
  pose: "running gracefully"
  decorations: "cherry blossoms, red lanterns, gold coins"
  style: "elegant illustration"
  text_content: "with Chinese text '恭喜发财' in golden calligraphy"

场景2:演示文稿配图

prompt_template: |
  {concept} visualization, professional infographic style,
  clean white background, modern corporate aesthetic,
  subtle gradients, minimalist design

variables:
  concept: "AI workflow automation"

场景3:社交媒体内容

prompt_template: |
  {subject} {action}, {platform} optimized aspect ratio,
  vibrant colors, eye-catching composition, 
  trending aesthetic, shareable content style
  
variables:
  subject: "coffee cup"
  action: "with steam rising"
  platform: "Instagram" # 1:1 or 4:5

输出格式

生成结果展示

## 🎨 图像生成完成

**Prompt**: [使用的英文Prompt]

**参数**:
- 风格: [style]
- 尺寸: [aspect_ratio]
- 分辨率: [resolution]

**生成结果**:
![Generated Image](path/​to/​image.png)

**下一步**:
- [ ] 满意,保存到指定位置
- [ ] 需要调整风格/颜色
- [ ] 需要修改特定部分
- [ ] 重新生成

注意事项

  1. 版权合规:生成的图像带有 SynthID 水印
  2. 内容政策:遵守 Google 使用政策,不生成敏感内容
  3. 商业使用:支持商业用途(营销、产品)
  4. 文字渲染:Nano Banana Pro 支持多语言文字,但中文效果需要验证
  5. 角色一致性:跨图保持角色特征需要使用参考图功能

资源引用

  • resources/​prompt_templates.yaml - 预设 Prompt 模板
  • resources/​style_presets.md - 风格预设详解
  • resources/​chinese_new_year_2026.md - 马年专属模板

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