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Free .NET OMR API to Scan Images & Extract Data

C# .NET Open Source Optical Mark Recognition (OMR) Library for Accurate Mark Detection, Scan Images, Extract Data & Sustomizable Configurations.

What is OMR Library?

In today’s fast-paced development environment, accurate data processing from paper forms is essential. Optical Mark Recognition (OMR) has become a preferred solution to recognize text from images and extract marked data quickly. The open-source .NET OMR Library by manharsharma007 on GitHub provides software developers with a flexible and efficient platform for .NET OMR software development. This C# OMR API enables users to scan and interpret marked forms, such as surveys and test sheets, turning them into machine-readable data. It supports various industries like education, research, and automated feedback systems, simplifying the process of extracting text from scanned documents.

This free OMR SDK for .NET stands out for its ease of use, support for multiple file formats, and highly customizable configuration options. Developers can also generate OMR templates, detect marked choices accurately, and integrate OMR functionality into web, desktop, or cloud apps with minimal effort. Built on open-source principles, it encourages community collaboration and continuous improvement. If you're looking to develop OMR apps without licensing costs, this free OMR library for C# delivers a powerful, adaptable toolkit to embed .NET Optical Mark Recognition features into your next project.

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Getting Started with OMR

The recommend way to install OMR is using NuGet. Please use the following command for a smooth installation.

Install OMR via NuGet

 # Using NuGet Package Manager

Install-Package OMR.Library

Install OMR via GitHub

 git clone https://github.com/manharsharma007/OMR.git

Perform Optical Mark Detection via C# API

One of the primary concerns in OMR is the accuracy of mark detection. The open source OMR C# Library excels in this aspect, providing reliable recognition of marked areas on scanned documents. This accuracy is crucial for ensuring the integrity of data collected through OMR processes. The library has included support for various document formats commonly used for OMR operations, including PDFs and image files. This versatility ensures compatibility with a wide range of input sources, accommodating the diverse needs of developers and users. The following example shows how software developers can perform accurate mark detection operation using C# code.

How to Perform Accurate Mark Detection inside C# Applications?

using OMR.Library;

OMRConfig config = new OMRConfig
{
    Sensitivity = 0.8, // Adjust according to your needs
    Threshold = 0.5    // Fine-tune as necessary
};

// You may add more configuration settings as needed
string filePath = "path/to/your/document.pdf"; // Replace with your document path

OMRProcessor processor = new OMRProcessor();
OMRResult result = processor.ProcessDocument(filePath, config);

// Access the result to retrieve detected marks
List detectedMarks = result.DetectedMarks;

// You can now work with the detected marks as needed

foreach (OMRMark mark in detectedMarks)
{
    // Access mark information such as coordinates, type, etc.
    int xCoordinate = mark.XCoordinate;
    int yCoordinate = mark.YCoordinate;
    OMRMarkType markType = mark.MarkType;

    // Perform actions based on the detected marks
    // (e.g., record user choices, analyze responses, etc.)
}

Customization & Multiple Marking Styles Support

Software Developers can customize the OMR processing parameters to fine-tune the library according to their specific requirements. This level of flexibility ensures adaptability to diverse OMR scenarios. The library supports various marking styles commonly found in OMR forms. This includes checkboxes, Moreover, bubbles, and other types of markings, making it versatile for different document types. Whether you're working on a small project or a large-scale application, the OMR C# Library is built to scale. It efficiently handles the processing of scanned documents, making it suitable for various use cases.

Create OMR Templates via C# API

The open source OMR library makes it easy for software developers to generate OMR templates inside their own C# applications. The library support easy creation of form scanning templates. There are several important features provided by the library while create new templates, such as auto image correction, size adjustments, rotation adjustment support, color adjustment and many more.