C# Optical Mark Recognition (OMR) Software in .NET

Optical Mark Recognition (OMR) is an automated process of capturing and analyzing data marked on a special type of document form. This special type of document could be marked/ filled by people on survey forms, test sheets, and other paper documents. In this article, we will learn how to develop a GUI-based OMR Sheet Reader application using C#. Our solution will take the scanned OMR sheet image as input from a local disk, then recognize the marks and finally export the marked registration number and shaded answers in CSV format. After following the mentioned steps, we will have our C# Optical Mark Recognition (OMR) Software in .NET. So let’s begin.

The article shall cover the following topics:

1. Features of C# Optical Mark Recognition (OMR) Software
2. C# OMR .NET API and UI Control
3. Steps to Develop C# OMR Software
4. C# Optical Mark Recognition (OMR) Software Demo
5. Download OMR Software Source Code

Features of C# Optical Mark Recognition (OMR) Software

Our Optical Mark Recognition (OMR) Software will have the following features:

1. Interactively adjust recognition parameters and watch their effect in real-time. We can adjust the following:
   • Recognition threshold
   • Zoom
   • Show/hide bubbles
2. Select and load the scanned image in the following formats:
   • PNG
   • JPG/JPEG
   • GIF
   • TIF/TIFF
3. Recognize the optical marks on the image.
4. Export results in CSV and save them to your local disk.

C# OMR .NET API and UI Control

Aspose.OMR for .NET API allows designing, creating, and recognizing answer sheets, tests, MCQ papers, quizzes, feedback forms, surveys, and ballots. Moreover, it provides a graphical user interface control that can be added to .NET UI applications. We will integrate Aspose.OMR for .NET UI control in the .NET UI application for developing an OMR scanner/reader application. Please either download the DLL of the API or install it using NuGet.

PM> Install-Package Aspose.OMR

Steps to Develop C# OMR Software

We can develop a GUI-based OMR scanner/reader application by following the steps given below:

• Firstly, create a new project and select the WPF App (.NET Framework) project template.

• Next, in Configure your new project dialog, enter the Project name, choose the Location, and set other parameters.

• Then, open NuGet Package Manager and install Aspose.OMR for .NET package.

• Next, add a new file DialogHelper.cs to the project.

• Add the following code to the newly created DialogHelper.cs.

• Next, update MainWindow.xaml file with the following XAML content.

• After that, replace the following content in MainWindow.xaml.cs file.

• Finally, run the application.

C# Optical Mark Recognition (OMR) Software Demo

The following is the demonstration of the OMR Scanner/Reader application we have just created.

Download C# .NET OMR Software Source Code

You can download the complete source code of the C# OMR Scanner application from GitHub.

Get a Free License

You can get a free temporary license to try the library without evaluation limitations.

Conclusion

In this article, we have learned how to

• integrate Aspose.OMR for .NET UI control in the .NET application;
• develop OMR sheet reader application in C#.

Besides, you can learn more about Aspose.OMR for .NET API using the documentation. In case of any ambiguity, please feel free to contact us on our forum.

See Also

• Perform OMR and Extract Data using C#
• Create Survey Form from JSON Markup using C#