Exception issue

Aspose.OMR Product Family
,
1

RecognitionResult recognitionResult = templateProcessor.Recognize(Path.Combine(“D:\Veera\HelloOMR\wwwroot\A4Uploads”, fileName));

If the image is unclear or blurred, throw an error in Asp.net core C#. I already tried the try-catch method, but in this scenario, a null value exception was thrown. How can I handle this?

2

@StanlyIGX

To handle exceptions when recognizing an image with Aspose.OMR, especially in cases where the image may be unclear or blurred, you can implement a check before calling the Recognize method. Since you are encountering a null value exception, it is essential to ensure that the image is valid and meets the recognition criteria.

Here’s a general approach you can take:

  1. Check Image Validity: Before calling the Recognize method, you can check if the image file exists and if it is not empty. You can also consider implementing additional checks for image clarity, such as analyzing the image dimensions or using a library to assess image quality.

  2. Try-Catch Block: Wrap your recognition call in a try-catch block to handle any exceptions that may arise during the recognition process.

Here’s an example code snippet demonstrating this approach:

using Aspose.OMR.Api;
using Aspose.OMR.Model;
using System;
using System.IO;

public class OMRRecognition
{
    public void RecognizeImage(string filePath, string patternPath)
    {
        if (!File.Exists(filePath))
        {
            Console.WriteLine("The specified image file does not exist.");
            return;
        }

        if (new FileInfo(filePath).Length == 0)
        {
            Console.WriteLine("The specified image file is empty.");
            return;
        }

        try
        {
            OmrEngine omrEngine = new OmrEngine();
            TemplateProcessor templateProcessor = omrEngine.GetTemplateProcessor(patternPath);
            RecognitionResult recognitionResult = templateProcessor.Recognize(filePath);
            // Process recognitionResult as needed
        }
        catch (Exception ex)
        {
            Console.WriteLine($"An error occurred during recognition: {ex.Message}");
        }
    }
}

In this code:

  • We first check if the file exists and if it is not empty.
  • We then attempt to recognize the image within a try-catch block to gracefully handle any exceptions that may occur.

This approach should help you manage the recognition process more effectively and avoid null value exceptions due to unclear or blurred images.

If you need further assistance or have specific requirements, feel free to ask!

3

Hello, @StanlyIGX

Can you share an example of images and .omr files that throw exception?