这个算是一个免费给百度打的广告吧，百度智能云里面有个百度识图接口，简介如下，只要有百度账号就能申请，每天500次免费调用，我无意中点进去的，就当是记录一下。

EasyDL是百度大脑推出的定制化AI训练及服务平台，支持面向各行各业有定制AI需求的企业用户及开发者使用。支持从数据管理与数据标注、模型训练、模型部署一站式AI开发流程，通过原始图片、文本、音频、视频类数据经过EasyDL加工、学习、部署可发布为公有云API、设备端SDK、本地化部署及软硬一体产品。

使用方法：
1.注册百度账号后进入百度ai开放平台，登录图像识别控制台，创建一个app，接口相关信息就有了。
2.代码

# coding=utf-8import sys
import json
import base64
import os# 保证兼容python2以及python3
IS_PY3 = sys.version_info.major == 3
if IS_PY3:from urllib.request import urlopenfrom urllib.request import Requestfrom urllib.error import URLErrorfrom urllib.parse import urlencodefrom urllib.parse import quote_plus
else:import urllib2from urllib import quote_plus#from urllib2 import urlopen#from urllib2 import Request#from urllib2 import URLErrorfrom urllib import urlencode# 防止https证书校验不正确
import ssl
ssl._create_default_https_context = ssl._create_unverified_contextAPI_KEY = '这里填你的api key'SECRET_KEY = '一样，secret key'#这里填你图像识别要调用的接口，我这里用的是图片通用识别
#会把图片里所有信息都识别出来，试了下感觉能有50-60%的正确识别率
IMAGE_RECOGNIZE_URL = "https://aip.baidubce.com/rest/2.0/image-classify/v2/advanced_general"#获取token的url，这个应该是固定的
"""  TOKEN start """
TOKEN_URL = 'https://aip.baidubce.com/oauth/2.0/token'"""获取token
"""
def fetch_token():params = {'grant_type': 'client_credentials','client_id': API_KEY,'client_secret': SECRET_KEY}post_data = urlencode(params)if (IS_PY3):post_data = post_data.encode('utf-8')req = Request(TOKEN_URL, post_data)try:f = urlopen(req, timeout=5)result_str = f.read()except URLError as err:print(err)if (IS_PY3):result_str = result_str.decode()result = json.loads(result_str)if ('access_token' in result.keys() and 'scope' in result.keys()):if not 'brain_all_scope' in result['scope'].split(' '):print ('please ensure has check the  ability')exit()return result['access_token']else:print ('please overwrite the correct API_KEY and SECRET_KEY')exit()"""读取文件
"""
def read_file(image_path):f = Nonetry:f = open(image_path, 'rb')return f.read()except:print('read image file fail')return Nonefinally:if f:f.close()"""调用远程服务
"""
def request(url, data):req = Request(url, data.encode('utf-8'))has_error = Falsetry:f = urlopen(req)result_str = f.read()if (IS_PY3):result_str = result_str.decode()return result_strexcept  URLError as err:print(err)"""调用菜品识别接口并打印结果
"""
def print_result(filename, url):# 获取图片，我这里用的是桌面的一个文件夹，遍历里面的jpg来识别。for root,dir,filenames in os.walk(r"C:\Users\abc\Desktop\新建文件夹"):for filename in filenames:if filename.endswith(".jpg"):filename=os.path.join(root,filename)file_content = read_file(filename)print(filename)response = request(url, urlencode({'image': base64.b64encode(file_content),'top_num': 1}))result_json = json.loads(response)# 打印图片结果for data in result_json["result"]:print(u"  菜品名称: " + data["keyword"])if data['root']:print(u"  菜品热量: " + data["root"])if __name__ == '__main__':# 获取access tokentoken = fetch_token()# 拼接图像识别urlurl = IMAGE_RECOGNIZE_URL + "?access_token=" + token# 菜品图1print("菜品1")print_result("./food1.jpg", url)# 菜品图3print("菜品2")print_result("./food2.jpg", url)# 菜品图3print("菜品3")print_result("./food3.jpg", url)