hr-ocr-idcard/core/parser.py

import re
import string
from dataclasses import dataclass
from collections import defaultdict
import numpy as np
import cpca
from typing import List

from core.line_parser import OcrResult


@dataclass
class RecItem:
    text: str = ''
    confidence: float = 0.

    def to_dict(self):
        return {"text": self.text, "confidence": np.nan_to_num(self.confidence)}


class Parser(object):
    def __init__(self, ocr_results: List[OcrResult]):
        self.result = ocr_results
        self.res = defaultdict(RecItem)
        self.keys = ["name", "id", "ethnicity", "gender", "birthday",
                     "address", "address_province", "address_city", "address_region", "address_detail", "expire_date"]
        for key in self.keys:
            self.res[key] = RecItem()


    def parse(self):
        return self.res


class FrontParser(Parser):
    """
    """

    def __init__(self, ocr_results: List[OcrResult]):
        Parser.__init__(self, ocr_results)

    def birth(self):
        if len(self.res["id"].text) == 18:
            # 342423 2001  0  2    1  5    6552
            # 012345 6789  10 11   12 13   14
            str_num = self.res["id"].text
            date = str_num[6:10] + "年" + str_num[10:12] + "月" + str_num[12:14] + "日"
            self.res["birthday"] = RecItem(date, self.res['id'].confidence)

    def card_no(self):
        """
        身份证号码
        """
        for idx, row in enumerate(self.result):
            for r in row:
                txt = r.txt

                # 身份证号码
                if "X" in txt or "x" in txt:
                    res = re.findall("\d*[X|x]", txt)
                else:
                    res = re.findall("\d{16,18}", txt)

                if len(res) > 0:
                    if len(res[0]) == 18:
                        self.res["id"].text = res[0]
                        self.res["id"].confidence = r.conf
                        self.res["gender"].text = "男" if int(res[0][16]) % 2 else "女"
                        self.res["gender"].confidence = r.conf
                        if idx < 2:
                            self.result = self.result[idx + 1:]
                            self.result.reverse()
                        else:
                            self.result = self.result[:idx]
                    return
        raise Exception('无法识别')

    def name(self):
        """
        姓名
        """

        if len(self.result[0]) == 2:
            for r in self.result[0]:
                if '姓' in r.txt or ('名' in r.txt and len(r.txt) < 3):
                    continue
                else:
                    self.res['name'] = RecItem(r.txt, r.conf)
                    return
        if len(self.result[0]) == 1:
            txt = self.result[0][0].txt
            conf = self.result[0][0].conf
            if "姓名" in txt:

                res = txt[2:]
                name_list = []
                point_unicode = ["\u2E31", "\u2218", "\u2219", "\u22C5", "\u25E6", "\u2981",
                                 "\u00B7", "\u0387", "\u05BC", "\u16EB", "\u2022", "\u2027",
                                 "\u2E30", "\uFF0E", "\u30FB", "\uFF65", "\u10101"]
                for n in range(len(point_unicode)):
                    point = re.findall(point_unicode[n], res)
                    if len(point) != 0:
                        name_list = res.split(point[0])
                        self.res['name'] = RecItem(name_list[0].replace('姓名') + '\u00B7' + name_list[1], conf)
                        return

                res = re.findall("姓名[\u4e00-\u9fa5]{1,7}", txt)
                if len(res) > 0:
                    self.res["name"] = RecItem(res[0].split("姓名")[-1], conf)
                    return
        raise Exception('无法识别')

    def national(self):
        # 性别女民族汉
        if len(self.result[1]) == 1:
            txt = self.result[1][0].txt
            conf = self.result[1][0].conf
            res = re.findall(".*民族[\u4e00-\u9fa5]+", txt)

            if len(res) > 0:
                self.res["ethnicity"] = RecItem(res[0].split("族")[-1], conf)
                return

    def address(self):
        """
        身份证地址
        """
        res = []
        confs = []

        for row in self.result[3:]:
            for r in row:
                txt = r.txt

                if (
                        "住址" in txt
                        or "址" in txt
                        or "省" in txt
                        or "市" in txt
                        or "县" in txt
                        or "街" in txt
                        or "乡" in txt
                        or "村" in txt
                        or "镇" in txt
                        or "区" in txt
                        or "城" in txt
                        or "组" in txt
                        or "旗" in txt
                        or "号" in txt
                ):
                    # if "住址" in txt or "省" in txt or "址" in txt:
                    if "住址" in txt or "址" in txt:
                        res.append(txt.split("址")[-1])
                    else:
                        res.append(txt)
                    confs.append(r.conf)

        if len(res) > 0:
            self.res["address"] = RecItem("".join(res), np.mean(confs))
            self.split_addr()
            return
        raise Exception('无法识别')

    def split_addr(self):
        conf = self.res["address"].confidence
        df = cpca.transform([self.res["address"].text])
        # print(df)

        province = df.iloc[0, 0]
        city = df.iloc[0, 1]
        region = df.iloc[0, 2]
        detail = df.iloc[0, 3]
        print(f'pronvince: {province}, city: {city}, region: {region}, detail: {detail}')
        self.res["address_province"] = RecItem(province, conf)
        self.res["address_city"] = RecItem(city, conf)
        if detail and "旗" in detail:
            temp_region = []
            temp_region.insert(0, detail.split("旗")[0] + "旗")
            self.res["address_region"] = RecItem(temp_region[0], conf)
            self.res["address_detail"] = RecItem(detail.split("旗")[-1], conf)
        else:
            self.res["address_region"] = RecItem(region, conf)
            self.res["address_detail"] = RecItem(detail, conf)
        if not self.res['address_region'].text or not self.res['address_detail'].text:
            raise Exception('无法识别')

    def parse(self):
        self.card_no()
        self.name()
        self.national()
        self.birth()
        self.address()
        return {key: self.res[key].to_dict() for key in self.keys}


class BackParser(Parser):
    def __init__(self, ocr_results: List[OcrResult]):
        Parser.__init__(self, ocr_results)

    def expire_date(self):
        for row in self.result:
            for r in row:
                txt = r.txt
                txt = txt.replace('.', '')
                res = re.findall('\d{8}\-\d{8}', txt)
                if res:
                    self.res["expire_date"] = RecItem(res[0], r.conf)
                    return
                res = re.findall('\d{8}\-长期', txt)
                if res:
                    self.res["expire_date"] = RecItem(res[0], r.conf)
                    return
        raise Exception('无法识别')

    def parse(self):
        self.expire_date()
        if not self.res["expire_date"].text:
            raise Exception("无法识别")
        return {key: self.res[key].to_dict() for key in self.keys}