Welcome Guest! To enable all features, please Login or Register.

Notification

Icon
Error

Options
View
Last Go to last post Unread Go to first unread post
#1 Posted : Thursday, October 5, 2017 4:45:31 PM(UTC)

Nick  
Nick

Groups: Registered, Tech Support, Administrators
Posts: 48


This code snippet shows how LEADTOOLS OCR can be used to detect, recognize, and execute simple mathematical statements such as "2 + 2".

Code:

      static void SimpleOCRCalculator(string filePath)
      {
         RasterCodecs codecs = new RasterCodecs();

         RasterImage image = codecs.Load(filePath);

         string[] calculations;
         using (IOcrEngine engine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage, false))
         {
            engine.Startup(null, null, null, null);
            IOcrPage page = engine.CreatePage(image, OcrImageSharingMode.None);

            page.AutoZone(null);
            page.Recognize(null);

            calculations = new string[page.Zones.Count];

            for (int i = 0; i < page.Zones.Count; i++)
            {
               calculations[i] = page.GetText(i);
            }

            engine.Shutdown();
         }

         Dictionary<string, Action<double, double>> operands = new Dictionary<string, Action<double, double>>();
         operands.Add("+", new Action<double, double>(delegate(double a, double b) { double ans = a + b; Console.WriteLine("{0} + {1} = {2}", a, b, ans); }));
         operands.Add("-", new Action<double, double>(delegate(double a, double b) { double ans = a - b; Console.WriteLine("{0} - {1} = {2}", a, b, ans); }));
         operands.Add("x", new Action<double, double>(delegate(double a, double b) { double ans = a * b; Console.WriteLine("{0} * {1} = {2}", a, b, ans); }));
         operands.Add("/", new Action<double, double>(delegate(double a, double b) { double ans = a / b; Console.WriteLine("{0} / {1} = {2}", a, b, ans); }));

         for (int i = 0; i < calculations.Length; i++)
         {
            string equation = Regex.Replace(calculations[i], @"\n|\r| ", "");
            string[] ops = new string[] { "+", "-", "x", "/" };

            for (int j = 0; j < ops.Length; j++)
            {
               int index = equation.IndexOf(ops[j]);

               if (index > 0 && index < equation.Length)
               {
                  string op1 = equation.Substring(0, index);
                  string op2 = equation.Substring(index + 1);

                  double arg1 = double.Parse(op1);
                  double arg2 = double.Parse(op2);

                  operands[ops[j]](arg1, arg2);

                  break;
               }
            }
         }

         codecs.Dispose();
         image.Dispose();
      }


The image used for testing is also included.
calc.png

Edited by moderator Wednesday, November 15, 2017 8:09:06 AM(UTC)  | Reason: Not specified

Nick Crook
Developer Support Engineer
LEAD Technologies, Inc.
nick@leadtools.com
www.LEADTOOLS.com
 

Try the latest version of LEADTOOLS for free for 60 days by downloading the evaluation: https://www.leadtools.com/downloads

Wanna join the discussion? Login to your LEADTOOLS Support accountor Register a new forum account.

You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET | YAF.NET © 2003-2017, Yet Another Forum.NET
This page was generated in 0.130 seconds.