Blockchain Identity Example "Passport Contract" Version 2

So in this example, on top of just information, i want to be saving the Users Picture just like the passport.
I should be able to retrieve this picture and be able to view it.
Given that there is no specific Datatype for image. i Will be using a "Base64" string of the image.
In order to see an example of this Image to String of Base64: Use this https://www.base64-image.de

 Following is some Sample Outputs and images size

Filesize:	8.21 KB
Encoded:	10.95 KB
Width:	170 px
Height:	86 px

Filesize:	53.60 KB
Encoded:	71.47 KB
Width:	511 px
Height:	511 px

From the samples. The bigger the image, the more KB of size, and more Ether needs to be spent.
Assuming i stick to a 72x72 image

Filesize:	6.68 KB
Encoded:	8.91 KB
Width:	72 px
Height:	72 px

which works fine to be saved in the block-chain for the period of the passport Validity.

The new code is added in Bold

pragma solidity ^0.4.0;

contract passportAresh{
    //Declare a struct similar to C++ 
    struct Passport{
        string givenName;
        string middleName;
        string surname;
        string passportType;
        string countryCode;
        string passportNumber;
        string dateBirth;
        string nationality;
        string gender;
        string placeBirth;
        string dateIssue;
        string dateExpire;
        //only if photo exists
        string Photo;
    }
    address creator; 
    mapping (bytes32 => Passport) AllCountryPassport;
    
    //modifier
    modifier onlyBy(address _account)
    {
        require(msg.sender == _account);
        // Do not forget the "_;"! It will
        // be replaced by the actual function
        // body when the modifier is used.
        _;
    }
    function passportAresh() public {
        creator = msg.sender;
    }
    function addPassport(string _firstname, string _lastname,
                        string _middlename, string _passtype, string _countrycode,
                        string _passno, string _datebirth, string _nationality,
                        string _gender, string _placebirth, string _dateissue,
                        string _dateexpire) public onlyBy(creator)
    {
      bytes32 hash = sha256(_passno);
      AllCountryPassport[hash] = Passport(_firstname,_middlename,
                                        _lastname, _passtype,_countrycode,_passno,_datebirth,
                                        _nationality,_gender,_placebirth,_dateissue,_dateexpire,'');  
    }
    
    function getPassportBasic(string _passnum) public view onlyBy(creator) returns (string _firstname, string _lastname,
                        string _middlename, string _passtype, string _countrycode,
                        string _passno) 
    {
        
        bytes32 hash = sha256(_passnum);
        return (AllCountryPassport[hash].givenName, AllCountryPassport[hash].surname,
                AllCountryPassport[hash].middleName,AllCountryPassport[hash].passportType,
                AllCountryPassport[hash].countryCode,AllCountryPassport[hash].passportNumber);
    }
    function getPassportAdvance(string _passnum) public view onlyBy(creator) returns (
                        string _passno, string _datebirth, string _nationality,
                        string _gender, string _placebirth, string _dateissue,
                        string _dateexpire)
    {
        bytes32 hash = sha256(_passnum);
        return (AllCountryPassport[hash].passportNumber,
                AllCountryPassport[hash].dateBirth,AllCountryPassport[hash].nationality,
                AllCountryPassport[hash].gender,AllCountryPassport[hash].placeBirth,
                AllCountryPassport[hash].dateIssue,AllCountryPassport[hash].dateExpire);
    }
    function addPhoto(string _passnum, string _base64) public onlyBy(creator){
        bytes32 hash = sha256(_passnum);
        AllCountryPassport[hash].Photo = _base64;
    }
    function getPhoto(string _passnum) public constant returns (string)
    {
        bytes32 hash = sha256(_passnum);
        return AllCountryPassport[hash].Photo;
    }
    //verify if person is of legal age (Bar/Club)
    function isLegalAge(string _passnum) public constant returns (string)
    {
        bytes32 hash = sha256(_passnum);
        return AllCountryPassport[hash].dateBirth;
    }
}