百度API之身份证识别

今天的任务是调用百度的API，实现身份证识别，然后我糟了，感觉有点难，开启百度模式，百度了半天，站到了别人写的代码，复制then粘贴→运行，成功了，可是不是自己的，于是在老师的指导下，阅读了百度给出的官方文档，决定自己写一下。

步骤如下：

1.注册登录

浏览器搜索百度AI智能开放平台，进入官网注册登录

2.找到如下图，点击身份证识别

3.点击立即使用

4.创建应用

5.填写信息。点击立即创建

6.返回应用列表

7.创建成功，注意图中标出的Appid, API Key ,secret Key

8.下面进入代码部分

环境依赖 requests，base65 库

下载requests库

pip install requests

推荐使用清华源,下载速度快

pip install requests -i https://pypi.tuna.tsinghua.edu.cn/simple

使用python代码如下，其他语言请参考https://ai.baidu.com/ai-doc/OCR/rk3h7xzck

import requests
import base64

'''
身份证识别
'''

request_url = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard"
# 二进制方式打开图片文件
f = open('[本地文件]', 'rb')
img = base64.b64encode(f.read())

params = {"id_card_side":"front","image":img}
access_token = '[调用鉴权接口获取的token]'
request_url = request_url + "?access_token=" + access_token
headers = {'content-type': 'application/x-www-form-urlencoded'}
response = requests.post(request_url, data=params, headers=headers)
if response:
    print (response.json())

注意文件路径f = open('[本地文件]', 'rb')

params = {"id_card_side":"front","image":img}
id_card_side的参数front为身份证正面，背面为back

获取Access Token

代码中三个参数

grant_type： 必须参数，固定为client_credentials；
client_id： 必须参数，应用的API Key；
client_secret： 必须参数，应用的Secret Key；

import requests 

# client_id 为官网获取的AK， client_secret 为官网获取的SK
host = 'https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=【官网获取的AK】&client_secret=【官网获取的SK】'
response = requests.get(host)
if response:
    print(response.json())

例如

import requests
import base64

host = 'https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=B5zZqwl2cO3b4lcWlPKoUuRO&client_secret=v4ZDzz8uT1pFaZkbOGLj5hSYupV7njKR'
response = requests.get(host)
if response:
    taken = response.json()

代码运行结果为

{
  "refresh_token": "25.b55fe1d287227ca97aab219bb249b8ab.315360000.1798284651.282335-8574074",
  "expires_in": 2592000,
  "scope": "public wise_adapt",
  "session_key": "9mzdDZXu3dENdFZQurfg0Vz8slgSgvvOAUebNFzyzcpQ5EnbxbF+hfG9DQkpUVQdh4p6HbQcAiz5RmuBAja1JJGgIdJI",
  "access_token": "24.6c5e1ff107f0e8bcef8c46d3424a0e78.2592000.1485516651.282335-8574074",
  "session_secret": "dfac94a3489fe9fca7c3221cbf7525ff"
}

获取access_token：taken['access_token']

最后，展示完整代码

import requests
import base64

# client_id 为官网获取的AK， client_secret 为官网获取的SK
host = 'https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=B5zZqwl2cO3b4lcWlPKoUuRO&client_secret=v4ZDzz8uT1pFaZkbOGLj5hSYupV7njKR'
response = requests.get(host)
if response:
    taken = response.json()
    print(taken)
    print(taken['access_token'])
    '''
    身份证识别
    '''
    request_url = "https://aip.baidubce.com/rest/2.0/ocr/v1/idcard"
    f = open('E:\plus班上课\模拟教务系统\db\card\张笑辉-正面.png', 'rb')
    img = base64.b64encode(f.read())
    params = {"id_card_side": "front", "image": img}
    access_token = taken['access_token']
    request_url = request_url + "?access_token=" + access_token
    headers = {'content-type': 'application/x-www-form-urlencoded'}
    response = requests.post(request_url, data=params, headers=headers)
    if response:
        res = response.json()
        print(res)