使用Nano Banana Pro（Gemini 3 Pro Image）通过第三方中转API站清云EchoFlow API生成或编辑图像。支持图像生成、图像编辑和多图像合成（最多14张图像）。当用户请求生成图像、创建图像、编辑图像或组合图像时使用。关键词：图像生成、图片生成、生成图片、AI绘画、Nano Banana Pro、Gemini、Gemini 3 Pro Image。

EchoFlow Image Generation (Nano Banana Pro)

Generate or edit images using EchoFlow API with Nano Banana Pro (Gemini 3 Pro Image). EchoFlow provides OpenAI-compatible access to Gemini's powerful image generation model.

Setup

1. Get your API key from EchoFlow: https://api.echoflow.cn/ 2. Set environment variable: ECHOFLOW_API_KEY 3. Alternatively, set in OpenClaw config: skills."echoflow-image-gen".apiKey

Quick Start

Generate Image

uv run {baseDir}/scripts/generate_image.py --prompt "a serene mountain landscape at sunset" --filename "mountain.png"

Edit Image (Single)

uv run {baseDir}/scripts/generate_image.py --prompt "add a rainbow in the sky" --filename "edited.png" -i "/path/to/input.png"

Multi-Image Composition (up to 14 images)

uv run {baseDir}/scripts/generate_image.py --prompt "combine these into one scene" --filename "combined.png" -i img1.png -i img2.png -i img3.png

Parameters

| Parameter | Description | Default | |-----------|-------------|---------| | --prompt, -p | Image description (required) | - | | --filename, -f | Output filename (required) | - | | --input-image, -i | Input image for editing (can repeat, max 14) | - | | --resolution, -r | Output resolution: 1K, 2K, 4K | 1K | | --model, -m | Model name | gemini-3.1-flash-image-preview | | --api-key, -k | Override API key | - | | --api-base | Override API base URL | https://api.echoflow.cn/v1 |

Available Models

Resolutions

Auto-detection: When editing images, the script auto-detects resolution from the largest input dimension:

Output

The script outputs:

Examples

# Simple generation
uv run {baseDir}/scripts/generate_image.py -p "a cute cat wearing a hat" -f "cat.png"
High resolution
uv run {baseDir}/scripts/generate_image.py -p "futuristic city" -f "city.png" -r 4K
Edit single image
uv run {baseDir}/scripts/generate_image.py -p "add snow to the scene" -f "snowy.png" -i summer.png
Compose multiple images
uv run {baseDir}/scripts/generate_image.py -p "create a collage of these photos" -f "collage.png" -i photo1.png -i photo2.png -i photo3.png -i photo4.png
Use gemini-3-pro-image-preview model
uv run {baseDir}/scripts/generate_image.py -p "abstract art" -f "art.png" -m "gemini-3-pro-image-preview"

API Reference

For detailed API documentation, see echoflow_api.md.

Notes

# Simple generation
uv run {baseDir}/scripts/generate_image.py -p "a cute cat wearing a hat" -f "cat.png"
High resolution
uv run {baseDir}/scripts/generate_image.py -p "futuristic city" -f "city.png" -r 4K
Edit single image
uv run {baseDir}/scripts/generate_image.py -p "add snow to the scene" -f "snowy.png" -i summer.png
Compose multiple images
uv run {baseDir}/scripts/generate_image.py -p "create a collage of these photos" -f "collage.png" -i photo1.png -i photo2.png -i photo3.png -i photo4.png
Use gemini-3-pro-image-preview model
uv run {baseDir}/scripts/generate_image.py -p "abstract art" -f "art.png" -m "gemini-3-pro-image-preview"

1. Get your API key from EchoFlow: https://api.echoflow.cn/ 2. Set environment variable: ECHOFLOW_API_KEY 3. Alternatively, set in OpenClaw config: skills."echoflow-image-gen".apiKey