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# -*- coding: utf-8 -*-
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from fastapi import FastAPI, APIRouter, UploadFile, File
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from fastapi.middleware.cors import CORSMiddleware
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from typing import List
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from fastapi.responses import JSONResponse
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import numpy as np
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import cv2
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import hyperlpr3 as lpr3
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import uvicorn
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import click
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type_list = ["蓝牌", "黄牌单层", "白牌单层", "绿牌新能源", "黑牌港澳", "香港单层", "香港双层", "澳门单层", "澳门双层", "黄牌双层"]
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catcher = lpr3.LicensePlateCatcher(detect_level=lpr3.DETECT_LEVEL_HIGH)
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class BaseResponse():
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def __init__(self, *args, **kwags) -> None:
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self.response = {
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'result': None,
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}
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# self.response.update(response)
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def http_ok_response(self, response_data):
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self.response['result'] = response_data
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self.response['code'] = 5000
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self.response['msg'] = '请求成功'
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return JSONResponse(self.response)
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def http_prermission_denied_response(self, response_data=None, error_msg=None):
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"""
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权限错误
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"""
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self.response['result'] = response_data
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self.response['code'] = 5005
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if error_msg:
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self.response['msg'] = error_msg
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else:
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self.response['msg'] = '权限校验失败，请重新检查权限'
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return JSONResponse(self.response)
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def http_request_parameter_error(self, response_data=None, error_msg=None):
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"""
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请求参数错误
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"""
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self.response['result'] = response_data
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self.response['code'] = 5007
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if error_msg:
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self.response['msg'] = error_msg
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else:
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self.response['msg'] = '提交参数异常，请重新检查接口参数'
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return JSONResponse(self.response)
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def http_server_error(self, response_data=None, error_msg=None):
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self.response['result'] = response_data
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self.response['code'] = 5009
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if error_msg:
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self.response['msg'] = error_msg
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else:
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self.response['msg'] = '服务异常'
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return JSONResponse(self.response)
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app = FastAPI(
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title="HyperLPR3-Api",
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version='0.0.9',
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docs_url='/api/v1/docs',
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description='HyperLPR3 Api Serving'
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)
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origins = [
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'http://localhost.slsmart.com',
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'https://localhost.slsmart.com',
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'http://localhost',
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'http://localhost:8715'
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]
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app.add_middleware(
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CORSMiddleware,
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allow_origins=origins,
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allow_credentials=True,
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allow_methods=['*'],
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allow_headers=['*'],
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)
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@app.get("/")
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async def running():
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'''当前api服务程序有在正常运行'''
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return """HyperLpr3 WebApi Server Running..."""
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@app.post("/api/v1/rec", tags=['车牌识别'])
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async def vehicle_license_plate_recognition(file: List[UploadFile] = File(...)):
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"""上传图片进行车牌识别，上传必须为图片类型png/jpg/jpge/wabp"""
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if len(file[0].filename) == 0:
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return BaseResponse().http_request_parameter_error(error_msg='单次上传图片不能为空')
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if len(file) > 1:
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return BaseResponse().http_request_parameter_error(error_msg='该接口仅支持单张图片上传')
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if len(file) == 1:
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if file[0].filename.rsplit('.', 1)[1].lower() not in ['png', 'jpeg', 'jpg', 'wabp']:
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return BaseResponse().http_request_parameter_error(error_msg='上传必须为图片类型png/jpg/jpge')
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content = await file[0].read()
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nparr = np.fromstring(content, np.uint8)
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img = cv2.imdecode(nparr, cv2.IMREAD_COLOR).astype(np.uint8)
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plates = catcher(img)
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results = list()
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for code, conf, plate_type, box in plates:
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if "nan" != f"{conf}": # conf=nan会导致Json序列化错误
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plate = dict(code=code, conf=float(conf), plate_type=type_list[plate_type], box=box)
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results.append(plate)
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return BaseResponse().http_ok_response({'plate_list': results})
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def get_application():
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return app
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@click.command(help="Exec HyperLPR3 WebApi Server.")
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@click.option("-host", "--host", default="0.0.0.0", type=str, )
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@click.option("-port", "--port", default=8715, type=int, )
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@click.option("-workers", "--workers", default=1, type=int, )
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def rest(host, port, workers):
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uvicorn.run(app="hyperlpr3.command.serve:app", host=host, port=port, workers=workers)
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if __name__ == "__main__":
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rest()
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