Seedream API：图片生成与编辑，每张 0.018 美元起

export LAOZHANG_API_KEY="替换为你的老张API密钥"
python -m pip install requests pillow

curl --fail-with-body "https://api.laozhang.ai/v1/images/generations" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedream-5-0-260128",
    "prompt": "A beautiful sunset over mountains, realistic style",
    "size": "2K",
    "response_format": "url",
    "watermark": false
  }' \
  -o seedream-generation.json

python save_images.py seedream-generation.json seedream-generation

import os
from pathlib import Path

import requests

API_URL = "https://api.laozhang.ai/v1/images/generations"
HEADERS = {"Authorization": f"Bearer {os.environ['LAOZHANG_API_KEY']}"}

response = requests.post(
    API_URL,
    headers=HEADERS,
    json={
        "model": "seedream-5-0-260128",
        "prompt": "A beautiful sunset over mountains, realistic style",
        "size": "2K",
        "response_format": "url",
        "watermark": False,
    },
    timeout=120,
)
response.raise_for_status()
result = response.json()
if not result.get("data"):
    raise SystemExit(f"没有返回图片：{result}")

image = requests.get(result["data"][0]["url"], timeout=60)
image.raise_for_status()
Path("seedream-generation.jpg").write_bytes(image.content)
print("已保存 seedream-generation.jpg")

curl --fail-with-body "https://api.laozhang.ai/v1/images/generations" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedream-5-0-260128",
    "prompt": "Generate a close-up image of a dog lying on lush grass.",
    "image": "https://ark-doc.tos-ap-southeast-1.bytepluses.com/doc_image/seedream4_imageToimage.png",
    "size": "2K",
    "response_format": "url",
    "watermark": false
  }' \
  -o seedream-edit.json

python save_images.py seedream-edit.json seedream-edit

IMG1=$(base64 < model.png | tr -d '\n')
IMG2=$(base64 < jacket.png | tr -d '\n')

curl --fail-with-body "https://api.laozhang.ai/v1/images/generations" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- \
  -o seedream-multi-edit.json <<EOF
{
  "model": "seedream-5-0-260128",
  "prompt": "让图 1 中的模特穿上图 2 的外套，保持图 1 的姿势、表情和背景不变",
  "image": [
    "data:image/png;base64,$IMG1",
    "data:image/png;base64,$IMG2"
  ],
  "size": "2K",
  "response_format": "url",
  "watermark": false
}
EOF

python save_images.py seedream-multi-edit.json seedream-multi-edit

import base64
import mimetypes
import os
from pathlib import Path

import requests

API_URL = "https://api.laozhang.ai/v1/images/generations"
HEADERS = {"Authorization": f"Bearer {os.environ['LAOZHANG_API_KEY']}"}


def to_reference(source):
    """公网 URL 原样使用，本地文件转成 data URL。"""
    if source.startswith(("http://", "https://", "data:")):
        return source
    path = Path(source)
    mime_type = mimetypes.guess_type(path.name)[0] or "image/png"
    encoded = base64.b64encode(path.read_bytes()).decode("ascii")
    return f"data:{mime_type};base64,{encoded}"


def seedream_edit(prompt, images, output_prefix, model="seedream-5-0-260128"):
    if not 1 <= len(images) <= 10:
        raise ValueError("Seedream 图改图需要 1–10 张参考图")
    references = [to_reference(source) for source in images]
    response = requests.post(
        API_URL,
        headers=HEADERS,
        json={
            "model": model,
            "prompt": prompt,
            # 一张参考图直接传字符串，多张传数组
            "image": references[0] if len(references) == 1 else references,
            "size": "2K",
            "response_format": "url",
            "watermark": False,
        },
        timeout=180,
    )
    response.raise_for_status()
    result = response.json()
    if not result.get("data"):
        raise SystemExit(f"没有返回图片：{result}")

    # 逐张保存 data[] 中的全部图片（组图模式可能返回多张）
    for index, item in enumerate(result["data"], start=1):
        image = requests.get(item["url"], timeout=60)
        image.raise_for_status()
        output = Path(f"{output_prefix}-{index}.jpg")
        output.write_bytes(image.content)
        print(f"已保存 {output}")


seedream_edit(
    prompt="让图 1 中的模特穿上图 2 的外套，保持图 1 的姿势、表情和背景不变",
    images=["model.png", "jacket.png"],
    output_prefix="seedream-multi-edit",
)

curl --fail-with-body --max-time 360 "https://api.laozhang.ai/v1/images/generations" \
  -H "Authorization: Bearer $LAOZHANG_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedream-5-0-flash-260915",
    "image": "https://example.com/your-poster.jpg",
    "layer_decomposition": true,
    "size": "1K",
    "response_format": "url",
    "watermark": false
  }' \
  -o seedream-layers.json

{
  "data": [
    {
      "url": "https://example.com/base.jpeg",
      "size": "896x1200",
      "output_format": "jpeg",
      "z_index": 0
    },
    {
      "url": "https://example.com/layer.png",
      "size": "916x529",
      "output_format": "png",
      "z_index": 4,
      "bounding_box": {
        "absolute": [260, 716, 619, 924],
        "normalized": [290, 597, 690, 769]
      },
      "name": "Spaceship",
      "description": "Sci-fi spaceship with blue engine glow effects, separate from the background nebula."
    }
  ],
  "usage": {
    "input_images": 1,
    "generated_images": 6
  }
}

python save_layers.py seedream-layers.json

{
  "created": 1726051200,
  "data": [
    {
      "url": "https://example.com/generated_image.jpg",
      "revised_prompt": "..."
    }
  ]
}