在线合成车牌照片【模拟车牌，用于车牌识别项目测试】

1、服务发布地址：

http://new.hdsxsc.com:10086/server.php?cphm=冀DSX888&cpys=0

2、传参说明：

cphm：车牌号码【仅限合规的车牌号码规则】
cpys：车牌颜色： 0=蓝色，1=黄色，2=白色，3=黑色，4=纯绿，6=黄绿
double：是否双层：0=单层 1=双层 【默认单层，仅白色和黄色支持双层车牌】

3、调用效果示例

3.1：蓝牌

http://new.hdsxsc.com:10086/server.php?cphm=冀DSX888&cpys=0

3.2：黄牌【单层】
http://new.hdsxsc.com:10086/server.php?cphm=冀DSX888&cpys=1

3.3：黄牌【双层】
http://new.hdsxsc.com:10086/server.php?cphm=冀DSX888&cpys=1&double=1

3.4 纯绿
http://new.hdsxsc.com:10086/server.php?cphm=冀DDS8888&cpys=4

3.5 黄绿
http://new.hdsxsc.com:10086/server.php?cphm=冀D88888D&cpys=6

项目库引用：

中国车牌模拟生成器【Python】
https://gitee.com/leijd/chinese_license_plate_generator

项目依赖安装：
./pip install -U opencv-python -i https://pypi.tuna.tsinghua.edu.cn/simple
./pip install -U numpy -i https://pypi.tuna.tsinghua.edu.cn/simple
./pip install -U tqdm -i https://pypi.tuna.tsinghua.edu.cn/simple
./pip install -U flask -i https://pypi.tuna.tsinghua.edu.cn/simple

服务页面代码：

#!/usr/bin/python3
#coding=utf-8
import cv2, os
import argparse
from generate_multi_plate import MultiPlateGenerator
from flask import Flask,request
import base64
import re

app = Flask(__name__)

@app.route("/")#路由：首页
def hello():
    return {
    
    'message':'wellcome to chinese_license_plate_generator api server!'}

@app.route('/server.php',methods=['POST','GET'])#路由/whatever_by_key.php, 接收方法：get,post 都行
def plate_special():
    plate_number = request.values.get('cphm')
    bg_color = request.values.get('cpys')
    double = request.values.get('double')
    
    if(bg_color=='0'):
        bg_color='blue'
    if(bg_color=='1'):
        bg_color='yellow'
    if(bg_color=='4'):
        bg_color='green_car'
    if(bg_color=='6'):
        bg_color='green_truck'
        
    if(double==None):
        double=False
    if(double=='0'):
        double=False
    if(double=='1'):
        double=True
    #按正则表达式，判断, 纠正车牌号颜色
    regex_0_1 = re.compile(r"[京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼]{1}[A-Z]{1}[A-HJ-NP-Z0-9]{5}$");                 #普通汽车 蓝/黄
    regex_4 = re.compile(r"[京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼]{1}[A-Z]{1}[DABCEFGHJK]{1}[A-HJ-NP-Z0-9]{1}[0-9]{4}$");    #新能源 小型车 纯绿
    regex_6 = re.compile(r"[京津沪渝冀豫云辽黑湘皖鲁新苏浙赣鄂桂甘晋蒙陕吉闽贵粤青藏川宁琼]{1}[A-Z]{1}[0-9]{5}[DABCEFGHJK]{1}$");                     #新能源 大型车 黄绿

    if(regex_4.match(plate_number)!=None):
        bg_color='green_car'

    if(regex_6.match(plate_number)!=None):
        bg_color='green_truck'
        
    if(not(regex_0_1.match(plate_number)!=None or regex_4.match(plate_number)!=None or regex_6.match(plate_number)!=None)):
        return '<img src="号码规则无效"></img>'

    generator = MultiPlateGenerator('plate_model', 'font_model')
    img = generator.generate_plate_special(plate_number, bg_color, double)
    image_code = str(base64.b64encode(cv2.imencode('.jpg', img)[1]))[2:-1]
    return '<img src="data:image/jpeg;base64,'+image_code+'"></img>'

if __name__ == "__main__":
    app.run(host='0.0.0.0',port=10086)

感谢网友反馈，更新新能源车牌 正则表达式