AI Image Generation (多后端自动切换)

Generate images from text prompts — completely free, no API key, no registration.

支持多后端自动降级：Pollinations → AI Horde → Craiyon → Together.ai

Quick Start

bash

./scripts/generate_image.sh "a sunset over mountains" /tmp/sunset.jpg

Usage

bash

./scripts/generate_image.sh "prompt" [output_path] [width] [height] [model]

Parameter	Default	Description
prompt	(required)	Text description of the image
output_path	`/tmp/ai_image_<timestamp>.png`	Where to save
width	1024	Image width in pixels
height	1024	Image height in pixels
model	flux	Generation model (Pollinations only)

后端优先级

后端	免费	速度	质量	需API Key
Pollinations	✅ 完全免费	⚡ 快	⭐⭐⭐⭐	❌
AI Horde	✅ 完全免费	🐌 慢(排队)	⭐⭐⭐	❌ (匿名可用)
Craiyon	✅ 完全免费	🕐 中等	⭐⭐	❌
Together.ai	✅ 有免费额度	⚡ 快	⭐⭐⭐⭐	✅ TOGETHER_API_KEY

脚本自动按优先级尝试，一个失败就试下一个。

Available Models (Pollinations)

Model	Style	Best For
`flux`	General purpose	Default, good all-around
`flux-realism`	Photorealistic	Portraits, landscapes, product shots
`flux-anime`	Anime/manga	Anime characters, illustrations
`flux-3d`	3D rendered	3D objects, scenes
`turbo`	Fast generation	Quick drafts, iteration
`dall-e-3`	DALL-E style	Creative, artistic

Integration with Messaging

After generating, send the image to the user via their messaging channel:

code

# Feishu
message send → channel=feishu, filePath=/tmp/image.png, message="description"

# Other channels
message send → channel=telegram/discord/etc, filePath=/tmp/image.png

Prompt Tips

•Supports both Chinese and English prompts
•Be specific: "a golden retriever puppy playing in autumn leaves, warm sunlight" > "a dog"
•Mention style: "watercolor painting of...", "photorealistic...", "anime style..."
•Mention lighting: "soft warm lighting", "dramatic shadows", "golden hour"
•Mention composition: "close-up", "wide angle", "bird's eye view"

Limitations

•No image editing (inpainting, outpainting) — generation only
•No consistent characters across images
•Rate limited per-backend (Pollinations generous but may temp-ban IPs; AI Horde uses kudos queue)
•curl needs -k flag (skip SSL verify) in some environments

Troubleshooting

Problem	Solution
SSL error	`-k` flag; or try next backend
Pollinations temp-banned	等15-30分钟自动恢复; 脚本会自动尝试备选
AI Horde 排队太久	匿名用户优先级低, 高峰可能等3-5分钟
All backends fail	手动访问 pollinations.ai / craiyon.com
Chinese prompt garbled	Script handles URL encoding via Python