In this how-to topic, we’ll show you how to create OMR answer sheet checker in C#. After this step by step guide, you’ll be able to scan multiple choice answer sheet in C# code. This topic helps to apply optical mark recognition in C# applications to an image.
Steps to Create OMR Answer Sheet Checker in C#
- Install Aspose.OMR for .NET package from NuGet.org
- Use Aspose.OMR and Aspose.OMR.Api namespaces to scan answer sheet in C#
- Set Aspose.OMR for .NET API license using SetLicense method
- Read OMR template into TemplateProcessor object using OmrEngine class
- Scan and Recognize PNG image to extract result as CSV data
- Save extracted CSV data as an output CSV file
The steps above help you read multiple choice answer sheet in C# quickly and easily. You do not need any external software to read answer sheet in C# application. The Aspose.OMR for .NET can solve this problem.
Code to Create OMR Answer Sheet Checker in C#
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| using System; | |
| using System.IO; | |
| //Add reference to Aspose.OMR for .NET API | |
| //Use following namespaces to create OMR answer sheet checker | |
| using Aspose.OMR; | |
| using Aspose.OMR.Api; | |
| namespace CreateOMRAnswerSheetChecker | |
| { | |
| class Program | |
| { | |
| static void Main(string[] args) | |
| { | |
| //Set Aspose license before creating OMR answer sheet checker | |
| //using Aspose.OMR for .NET | |
| Aspose.OMR.License AsposeOMRLicense = new Aspose.OMR.License(); | |
| AsposeOMRLicense.SetLicense(@"c:\asposelicense\license.lic"); | |
| //Load template file into template processor | |
| OmrEngine OMREngine = new OmrEngine(); | |
| TemplateProcessor OMRTemplateProcessor = OMREngine.GetTemplateProcessor("OMRTemplate.omr"); | |
| //Get CSV values from the actual image | |
| String ExtractedCSVFromImage = OMRTemplateProcessor.RecognizeImage("AnswerSheetImageToOMR.png").GetCsv(); | |
| //Save output as CSV | |
| File.WriteAllText("OutputExtractedCSVValues.csv", ExtractedCSVFromImage); | |
| } | |
| } | |
| } |
In the above code, we have applied optical mark recognition on a PNG image and read answer sheet in C#. Note that we’re using an OMR template to recognize the multiple choice answer sheet. Finally, we have saved the extracted data in a CSV file.
