public static matrixItem getItem(List <string> lines, int l, int x)
{
//Console.WriteLine("l = " + l);
string line0, line1, line2;
int index = x * 3;
line0 = lines[l].Substring(index, 3);
line1 = lines[l + 1].Substring(index, 3);
line2 = lines[l + 2].Substring(index, 3);
matrixItem ocrDigit = new matrixItem(line0, line1, line2, 0);
return(ocrDigit);
}
public static int toDigit(matrixItem ocrDigit)
{
int value = -1;
// all the parentheses seem to be needed - otherwise errors
if ((ocrDigit.Row1.Equals(" ")) &
(ocrDigit.Row2.Equals(" |")) &
(ocrDigit.Row3.Equals(" |")))
{
value = 1;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals(" _|")) &
(ocrDigit.Row3.Equals("|_ ")))
{
value = 2;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals(" _|")) &
(ocrDigit.Row3.Equals(" _|")))
{
value = 3;
}
else if ((ocrDigit.Row1.Equals(" ")) &
(ocrDigit.Row2.Equals("|_|")) &
(ocrDigit.Row3.Equals(" |")))
{
value = 4;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals("|_ ")) &
(ocrDigit.Row3.Equals(" _|")))
{
value = 5;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals("|_ ")) &
(ocrDigit.Row3.Equals("|_|")))
{
value = 6;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals(" |")) &
(ocrDigit.Row3.Equals(" |")))
{
value = 7;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals("|_|")) &
(ocrDigit.Row3.Equals("|_|")))
{
value = 8;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals("|_|")) &
(ocrDigit.Row3.Equals(" _|")))
{
value = 9;
}
else if ((ocrDigit.Row1.Equals(" _ ")) &
(ocrDigit.Row2.Equals("| |")) &
(ocrDigit.Row3.Equals("|_|")))
{
value = 0;
}
else
{
ocrDigit.ErrorCode = 1;
Debug.WriteLine("Error in data: digit not recognized");
}
return(value);
}
static void Main(string[] args)
{
/*
* Imperfect to hard-code the input file, but here
* overriding it with user input is possible.
* Using built-in functions to obtain the local project path could be better.
*/
string path = @"/Users/alcurry/Projects/bankOCR/OCRinput.txt";
Console.WriteLine("default input file is : " + path);
Console.WriteLine("to use it, press enter, or enter your full path and filename");
string newPath = Console.ReadLine();
if (!String.IsNullOrWhiteSpace(newPath))
{
path = newPath;
}
if (!File.Exists(path))
{
Debug.WriteLine("Where you at ?");
}
List <string> lines = File.ReadLines(path).Where(line => line != "").ToList();
Debug.WriteLine(lines.Count + " lines in input file");
for (int i = 0; i <= lines.Count - 1; i++)
{
Debug.Write(lines[i]);
Debug.WriteLine(lines[i].Length);
}
matrixItem digit = new matrixItem();
for (int l = 0; l < lines.Count; l += 3)
{
int x = 0;
int value = 0;
string strResult = "";
/*
* Assume no blank columns between characters
* requirements inconsistent (written description vs. sample input file),
* this approach probably makes more sense for a real application.
*
* Calculating "charCount" this way, diving by 3, since the matrix is 3
* characters wide. Problem description states errors are limited -
* "the characters inside the 3 x 3 matrix may not be valid" - this is checked
* in the toDigit method in the matrixItem class.
*/
int charCount = lines[l].Length / 3;
do
{
digit = matrixItem.getItem(lines, l, x);
value = matrixItem.toDigit(digit);
x++;
// convert each digit returned to a string, final output for each line
// is a string, check for errors from each 3x3 matrix
strResult = strResult + value.ToString();
if (value == -1)
{
Console.WriteLine("Error in data");
break;
}
} while (x < charCount);
// No errors from "toDigit" above
if (value > -1)
{
Console.WriteLine(strResult);
}
}
}
