问题：百度接口 baidu-aip 识别图片效果不佳

百度提供其他高精度识别图片接口 https://cloud.baidu.com/doc/OCR/OCR-API.html#.E8.AF.B7.E6.B1.82.E6.A0.BC.E5.BC.8F
通过 python 的 requests 库实现获取验证码

获取图片验证码

思路

截图页面
地位验证码位置
保存验证码图片
调用百度接口获取验证码

关键字：GUI_Get_Verify_Code

百度接口

手写文字识别：https://cloud.baidu.com/doc/OCR/OCR-API.html#.E6.89.8B.E5.86.99.E6.96.87.E5.AD.97.E8.AF.86.E5.88.AB
注册百度账号，百度云管理中心创建应用，生成AppID、App Key、Secret Key
参数：
API_KEY：必须参数，应用的API Key；
SECRET_KEY：必须参数，应用的Secret Key
image：图像的 base64 编码
language_type：语言类型

pyhon 源代码

# coding=utf-8

# Author: Allan
# Version: 2.0

import os
from PIL import Image
import requests
import base64
import json

def get_image(path, filename, img, positions=None):
    """ 通过Image处理图像 """
    im = Image.open(os.path.join(path, filename))
    im = im.crop(positions)
    im.save(os.path.join(path, img))
    return 'PASS'

def get_file_content(path, filename):
    """ 读取图片 """
    filename = os.path.join(path, filename)
    with open(filename, 'rb') as fp:
        return fp.read() 

def GetCaptchaV(path, filename):
    """
    获取验证码
    Arguments:
            |  path  | 路径 |
    Arguments:
            |  filename  | 文件名 |
    Examples:
    | GetCaptchaV | path | verify.png | 
    """
    url_post = 'https://aip.baidubce.com/rest/2.0/ocr/v1/handwriting'
    image = get_file_content(path, filename)
    image = base64.b64encode(image)
    access_token = get_access_token()
    data = {'access_token': access_token, 'image': image, 'language_type': 'CHN_ENG'}
    headers = {'Content-Type': 'application/x-www-form-urlencoded'}
    post_req = requests.post(url_post, headers=headers, data=data)
    res = post_req.text
    res = json.loads(res, encoding='utf-8')
    if res['words_result']:
        # 防止为空，报异常
        code = res['words_result'][0]['words']
        if ' ' in code:
            # 去掉空格
            code = code.replace(' ', '')
        return code
    return '0'

def get_access_token():
    """ 获取百度访问token """
    API_KEY = 'xxx'
    SECRET_KEY = 'yyy'
    url = 'https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id={}&client_secret={}'.format(API_KEY, SECRET_KEY)
    res = requests.post(url)
    res = json.loads(res.text, encoding='utf-8')
    return res['access_token']