Description of the Issue:
I am working on an OMR processing project using Aspose.OMR in C#. The .omr file is generated successfully, and its size is not empty, yet when I try to load and recognize the template, I receive the following error:
Initializing OMR Engine…
Loading OMR Template…
OMR Template loaded successfully.
Recognizing the Single Bubble from the Image…
Error: .omr file is empty
Steps to Reproduce the Issue:
- Generate the
.omrtemplate using Aspose.OMR. - Validate the
.omrfile:
- Check its existence: (File is present)
- Check its size: (File is not empty)
- Print first few bytes: (File contains JSON data)
- Load the template using
GetTemplateProcessor(). - Attempt to recognize an image (
single_filled_corrected.png). - The recognition fails with “.omr file is empty”.
code ‘’’
using System;
using System.IO;
using System.Linq;
using System.Text;
using Aspose.OMR.Api;
using Aspose.OMR.Generation;
using Aspose.OMR.Model;
class Program
{
static void Main()
{
string templatePath = “SingleBubbleTemplate.omr”;
string formImage = “single_filled_corrected.png”;
Console.WriteLine("📝 Starting OMR Processing...");
try
{
GenerateSingleBubbleTemplate(templatePath);
if (!File.Exists(templatePath) || new FileInfo(templatePath).Length == 0)
{
Console.WriteLine("❌ OMR Template file is missing or empty.");
return;
}
Console.WriteLine($"✅ OMR Template created at: {templatePath}, Size: {new FileInfo(templatePath).Length} bytes");
byte[] omrFileBytes = File.ReadAllBytes(templatePath);
Console.WriteLine($"🔍 First few bytes of .omr file: {BitConverter.ToString(omrFileBytes.Take(20).ToArray())}");
if (!File.Exists(formImage))
{
Console.WriteLine("❌ OMR filled form image not found.");
return;
}
Console.WriteLine("🔄 Initializing OMR Engine...");
OmrEngine omrEngine = new OmrEngine();
Console.WriteLine("🔄 Loading OMR Template...");
TemplateProcessor templateProcessor = omrEngine.GetTemplateProcessor(templatePath);
Console.WriteLine("✅ OMR Template loaded successfully.");
Console.WriteLine("🔄 Recognizing the Single Bubble from the Image...");
RecognitionResult recognitionResult = templateProcessor.Recognize(formImage);
Console.WriteLine("✅ OMR Recognition completed.");
}
catch (Exception ex)
{
Console.WriteLine($"❌ Error: {ex.Message}");
}
}
static void GenerateSingleBubbleTemplate(string templatePath)
{
try
{
OmrEngine omrEngine = new OmrEngine();
string omrTemplateText = "SingleBubbleTemplate\n? SingleBubble\n( )";
using (MemoryStream templateStream = new MemoryStream(Encoding.UTF8.GetBytes(omrTemplateText)))
{
GlobalPageSettings pageSettings = new GlobalPageSettings();
TemplateGenerationResult generateResult = omrEngine.Generate(templateStream, pageSettings);
File.WriteAllBytes(templatePath, generateResult.Template);
}
Console.WriteLine($"✅ OMR Template generated successfully at: {templatePath}");
}
catch (Exception ex)
{
Console.WriteLine($"❌ Error generating OMR template: {ex.Message}");
}
}
}
‘’’