前景分割工具 (抠图)

API 端点

POST https://jimeng.jianying.com/mweb/v1/aigc_draft/generate

Python 示例

import requests
import hashlib
import time
import uuid
import json

def generate_sign(uri_path):
    device_time = int(time.time())
    sign_str = f"9e2c|{uri_path[-7:]}|7|5.8.0|{device_time}||11ac"
    sign = hashlib.md5(sign_str.encode()).hexdigest()
    return sign, device_time

def foreground_segmentation(sessionid, image_uri):
    uri = "/mweb/v1/aigc_draft/generate"
    sign, device_time = generate_sign(uri)
    
    component_id = str(uuid.uuid4())
    
    draft_content = {
        "type": "draft",
        "id": str(uuid.uuid4()),
        "min_version": "3.3.8",
        "is_from_tsn": True,
        "version": "3.3.8",
        "main_component_id": component_id,
        "component_list": [{
            "type": "image_base_component",
            "id": component_id,
            "min_version": "3.3.8",
            "metadata": {
                "type": "",
                "id": str(uuid.uuid4()),
                "created_platform": 3,
                "created_time_in_ms": int(time.time() * 1000)
            },
            "generate_type": "cutout",
            "aigc_mode": "workbench",
            "abilities": {
                "type": "",
                "id": str(uuid.uuid4()),
                "cutout": {
                    "type": "",
                    "id": str(uuid.uuid4()),
                    "init_image": {
                        "type": "image",
                        "id": str(uuid.uuid4()),
                        "source_from": "upload",
                        "platform_type": 1,
                        "image_uri": image_uri,
                        "uri": image_uri
                    },
                    "history_option": {"type": "", "id": str(uuid.uuid4())}
                }
            }
        }]
    }
    
    headers = {
        "Content-Type": "application/json",
        "Appid": "513695",
        "Appvr": "5.8.0",
        "Pf": "7",
        "Origin": "https://jimeng.jianying.com",
        "Referer": "https://jimeng.jianying.com",
        "Cookie": f"sessionid={sessionid}",
        "Device-Time": str(device_time),
        "Sign": sign,
        "Sign-Ver": "1"
    }
    
    data = {
        "extend": {},
        "submit_id": str(uuid.uuid4()),
        "draft_content": json.dumps(draft_content),
        "http_common_info": {"aid": 513695}
    }
    
    resp = requests.post(
        f"https://jimeng.jianying.com{uri}",
        params={"aid": 513695, "device_platform": "web", "region": "CN", "da_version": "3.3.8"},
        headers=headers,
        json=data
    )
    return resp.json()

参数说明

功能

从图片中提取前景主体，去除背景，输出透明背景 PNG 图片。

使用流程

1. 上传图片获取 image_uri (见 dreamina-upload-image)
2. 调用抠图 API
3. 轮询查询结果 (见 dreamina-query-result)
4. 下载透明背景图片