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hair/face_features.py
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2026-06-23 23:30:24 +08:00

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"""接口4:用户面部特征分析(调用火山方舟 豆包视觉模型 doubao-seed-1-6-vision)。
算法来源:/home/xsl/fuyanFaceArk.py)。worker 把图片以 base64 data URI 传给方舟
多模态模型,模型返回一大堆人脸特征 JSON;本模块解析后映射出接口4 的英文优先字段
face_shape 等),并保留 doubao 返回的全部中文字段。
⚠️ 这是**唯一调外网云模型**的接口(其余接口全本地)。API Key 走配置/环境变量,不入 git。
"""
from __future__ import annotations
import base64
import json
import logging
import os
logger = logging.getLogger("hair.worker")
ARK_BASE_URL = os.getenv("ARK_BASE_URL", "https://ark.cn-beijing.volces.com/api/v3")
ARK_MODEL = os.getenv("ARK_MODEL", "doubao-seed-1-6-vision-250815")
# doubao 中文键 → 接口4 英文优先字段(仅保留这 6 项)
_KEY_MAP = {
"脸型": "face_shape",
"眉形": "eyebrow_shape",
"面部年龄": "facial_age",
"动静类型": "dynamic_static_type",
"性别": "gender",
"基因风格": "gene_style",
}
# 仅请求接口4 需要的 6 个字段(+「图片是否有人脸」用于 1001 判定,不进最终输出)
_PROMPT = (
"分析一下图片告诉我以下特征,只要答案,格式为json字符串,"
"图片是否有人脸(有人/没人) "
"脸型(圆形脸/心形脸/菱形脸/鹅蛋脸/方形脸/长形脸/瓜子脸) 眉形 "
"面部年龄(给出区间年龄) 动静类型(静态型/动态型) 性别(男/女) "
"基因风格(戏剧型/睿智型/自然型/古典型/优雅型/浪漫型/前卫型/少女型/少年型)"
)
_client = None
def _load_api_key() -> str | None:
"""ARK_API_KEY 环境变量优先,否则读 worker_config.json / gateway/config.json 的 ark_api_key。"""
key = os.getenv("ARK_API_KEY")
if key:
return key
base = os.path.dirname(__file__)
for cfg_name in ("worker_config.json", "gateway/config.json"):
cfg = os.path.join(base, cfg_name)
if os.path.isfile(cfg):
try:
with open(cfg, encoding="utf-8") as f:
v = json.load(f).get("ark_api_key")
if v:
return v
except Exception as e: # noqa: BLE001
logger.warning("读取 %s ark_api_key 失败:%s", cfg_name, e)
return None
def get_client():
global _client
if _client is None:
from volcenginesdkarkruntime import Ark
key = _load_api_key()
if not key:
raise RuntimeError("缺少火山方舟 API Key(设 ARK_API_KEY 或 worker_config.json.ark_api_key")
_client = Ark(base_url=ARK_BASE_URL, api_key=key)
return _client
def _parse_json(text: str) -> dict:
"""去掉 ```json 包裹后解析。"""
s = text.strip()
if s.startswith("```"):
s = s.strip("`")
if s[:4].lower() == "json":
s = s[4:]
return json.loads(s.strip())
def _image_to_url(image_bytes: bytes = None, image_url: str = None) -> str:
"""优先用现成 URL;否则把字节转 base64 data URIdoubao 兼容)。"""
if image_url:
return image_url
fmt = "png" if image_bytes[:8] == b"\x89PNG\r\n\x1a\n" else "jpeg"
return f"data:image/{fmt};base64," + base64.b64encode(image_bytes).decode()
def analyze_features(image_bytes: bytes = None, image_url: str = None):
"""调 doubao 视觉模型分析人脸特征。
Returns: dict —— 仅含接口4 的 6 个英文字段(face_shape/eyebrow_shape/facial_age/
dynamic_static_type/gender/gene_style)**无人脸返回 None**(调用方据此判 1001)。
"""
url = _image_to_url(image_bytes, image_url)
resp = get_client().chat.completions.create(
model=ARK_MODEL,
messages=[{
"role": "user",
"content": [
{"type": "image_url", "image_url": {"url": url}},
{"type": "text", "text": _PROMPT},
],
# 【SDK原生支持的标准参数,绝对不报错】
max_tokens=1024, # 限制输出长度,模型秒回
temperature=0, # 固定输出,无随机采样,提速+结果稳定
stream=False, # 关闭流式,单次返回结果更快
# 【官方正确写法】扩展参数必须放在extra_body中传递
extra_body={
"thinking": {
"type": "disabled" # 【核心提速】彻底关闭深度思考模式,提速50%+,官方标准格式{insert\_element\_1\_}
}
}
}],
)
text = resp.choices[0].message.content
raw = _parse_json(text) # doubao 原始中文字段
if not has_face(raw):
return None
# 只保留 6 个英文字段(doubao 缺某字段则跳过)
return {en: raw[zh] for zh, en in _KEY_MAP.items() if zh in raw}
def has_face(features: dict) -> bool:
"""据 doubao 的「图片是否有人脸」判断。"""
v = features.get("图片是否有人脸") or features.get("是否有人") or ""
return "没人" not in str(v) and "没有" not in str(v)
if __name__ == "__main__":
import sys
path = sys.argv[1] if len(sys.argv) > 1 else "tests/fixtures/frontal.jpg"
with open(path, "rb") as f:
feats = analyze_features(image_bytes=f.read())
if feats is None:
print("无人脸(1001")
else:
print(json.dumps(feats, ensure_ascii=False, indent=2))