Seedream 5.0 Pro API：中文海报与参考图编辑

curl --fail-with-body --max-time 180 https://api.apizt.com/v1/images/generations \
  -H "Authorization: Bearer $tokenba_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedream-5-0-pro-260628",
    "prompt": "生成一张竖版书店活动海报，奶油白背景、深紫色中文标题“周末阅读会”，下方准确写“周六 14:00”，主体是一叠书与一杯茶。版面留白充足，文字清晰，不添加价格、品牌或其他文字。",
    "size": "2K",
    "output_format": "png",
    "response_format": "b64_json"
  }' \
  -o seedream-generation-response.json

python3 - <<'PY'
import base64, json
from pathlib import Path

result = json.loads(Path("seedream-generation-response.json").read_text())
items = result.get("data", [])
if not items or not items[0].get("b64_json"):
    raise RuntimeError("No image data returned; check response JSON")
Path("seedream-generation.png").write_bytes(base64.b64decode(items[0]["b64_json"], validate=True))
print("seedream-generation.png")
print(result.get("usage"))
PY

import base64, json, os
from pathlib import Path
from urllib.request import Request, urlopen

reference = base64.b64encode(Path("reference.png").read_bytes()).decode("ascii")
payload = {
    "model": "doubao-seedream-5-0-pro-260628",
    "prompt": "保留参考图中商品的形状、颜色、标签和数量，将背景更换为浅色影棚并添加柔和地面阴影。商品完整进入画面，不修改商品文字，不增加装饰物。生成一张正方形商品展示图。",
    "image": "data:image/png;base64," + reference,
    "size": "2K",
    "output_format": "png",
    "response_format": "b64_json",
}
request = Request(
    "https://api.apizt.com/v1/images/generations",
    data=json.dumps(payload).encode("utf-8"),
    headers={
        "Authorization": "Bearer " + os.environ["tokenba_API_KEY"],
        "Content-Type": "application/json",
    },
    method="POST",
)
with urlopen(request, timeout=180) as response:
    result = json.load(response)
Path("seedream-edit-response.json").write_text(json.dumps(result), encoding="utf-8")
items = result.get("data", [])
if not items or not items[0].get("b64_json"):
    raise RuntimeError("No image data returned; check response JSON")
Path("seedream-edit.png").write_bytes(base64.b64decode(items[0]["b64_json"], validate=True))
print("seedream-edit.png")
print(result.get("usage"))