This Python3 program is specifically designed for Indian state driving licences.This 

program takes an image (i.e. a jpg or png file) as an argument to the command and validates

if the image is an Indian Driving Licence or not.If it is, then it extracts information 

from the image like Document is a Indian Drivers licence date of expiry, date of birth,

Drive licence # and Name of licence holder.


from PIL import Image
import pytesseract
import datetime
import sys
import os
import os.path
import re
import cv2
import numpy as np

#class to extract text from an image where the image file is passed as an argument

# to the command
class Text_Extractor():
    #Constructor
    def __init__(self,image_file):
        self.image_file=image_file
        if self is None:
            return 0
        
#Function to extract the text from image as string 
    def extract_text(self):
         try:
            image=cv2.imread(self.image_file)
            # Convert to gray
            image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
            #Resize the image
            image = cv2.resize(image, None, fx=2, fy=2)
            text=pytesseract.image_to_string(image,config='--tessdata-dir "/usr/local/Cellar/tesseract/4.0.0_1/share/tessdata"') 
            return text
         except Exception as e:
            print(str(e))

#class to validate if an image is a drivers licence 
class Drivers_Licence_Validator:
    #Constructor
    def __init__(self,text):
          self.text=text
#Function to validate  an Indian driving licence
    def is_licence(self):
        res=self.text.split('/n')
        for word in res:
            if word=='Driving' or 'DRIVING':
                    print("Document is a Indian Drivers licence")
                    return True
            else:
                print("Document is not a Indian Drivers licence")
                print("Please try again with a valid Drivers licence")
                return False
#Function to find the age of the licence holder
    def age(self,y,m,d):
        dob = datetime.date(y,m,d)
        today = datetime.date.today()
        years = today.year - dob.year
        if today.month < dob.month or (today.month == dob.month and today.day < dob.day):
            years -= 1
        return years
    #Function to validate if driving licence is expired or not
    def is_valid(self):
        if (self.is_licence()):
            res=self.text.split()   

            list_of_states={'JK','HP','PN','CH','UK','UA','HR','DL','RJ','UP','BR','SK','AR','AS','NL','MN','ML','TR','MZ','WB','JH','OR','OD','CG','MP','GJ','MH','DD','DN','TS','AP','KA','KL','TN','PY','GA','AN','LD'}
            match=None
            day=None
            month=None
            year=None
            date_of_expiry=None
            dob=None
            count=0
            s=None
            strings_with_states=[]
     #get all the dates in a list
            p = re.compile('d+/d+/d+')
            if (p.findall(self.text)):
                dates=p.findall(self.text)
            else:
                p = re.compile('d+-d+-d+') 
                dates=p.findall(self.text)
            now = datetime.datetime.now()
            for date in dates:
                if '/' in date:
                       day,month,year=date.split("/")
                else:
                       day,month,year=date.split("-")
                age=self.age(int(year),int(month),int(day))
                temp_date= datetime.datetime(int(year), int(month),int(day))
                if temp_date>=now:
                    date_of_expiry=temp_date
                if age>=18:
                    dob=temp_date
            if date_of_expiry :
                print("Date of expiry :"+ str( date_of_expiry.strftime('%Y-%m-%d')))
            else:
                print("Cannot determine the date of expiry or the licence has expired")
            if dob:
                print("Date of birth :"+ str(dob.strftime('%Y-%m-%d')))
            elif 'DOB' in res:
                index=res.index('DOB')
                if ':' not in res[index+1]:
                    print( 'DOB is: '+ res[index+1])
                else:
                    print( 'DOB is: '+ res[index+2])
            else:
                print("Cannot determine the date of birth")
	  #check for strings with state codes
            for word in res:
                for state in list_of_states:
                    if state in word:
                        strings_with_states.append(word)
	#get the driving licence # from the strings with state codes
            for string in strings_with_states:
                for i in string:
                    if(i.isdigit()):
                        count=count+1
                
                if count<13:
                    index=res.index(string)
                    s=res[index] + res[index +1]
                    if len(s)>=15:
                        for i in s:
                            if(i.isdigit()):
                                count=count+1
                        if count>13:
                            s=s[-16:]
                            print('Driving licence # is :'+ s)
                            break
                            break
                else:
                    print('Driving licence # is :'+ string)
                    break
                    break
             # get the name next to the string 'Name' in the text extracted               
            if 'Name' in res:
                index=res.index('Name')
                print('Name of licence holder: '+ res[index+1]+ ' ' + res[index+2])
            return True
                

def main():
        te=Text_Extractor(sys.argv[1])    
        image_text=te.extract_text()		#call the text extractor function 
        dlv=Drivers_Licence_Validator(image_text)
        dlv.is_valid()				# call  the licence validation function
    
main()




Input :indian-driving-license.jpg

Output:
Document is a Indian Drivers License
Date of expiry :2026-02-08
Date of birth :1976-02-09
Driving License Number is :DL-0420110149646
Name of License holder: : ANURAG

Limitations:The limitations to this program as based on the quality of the image passed 
as input to the program.The text read by the OCR functionality of OpenCV provided by 
tesseract. So in cases where the Optical Character Recognition(OCR) is not done well, 
the text is either read incorrectly or not read at all.The user might want to try
different images.