OMR Sheet Reader in Java - OMR Sheet PNG

Optical mark recognition (OMR) is a process of retrieving data from a document that has a certain type of marking. The markings are done by humans and are read by OMR sheet reader software or a scanner. However, OMR is an important component in automating the creation and evaluation of answer sheets and OMR templates. So, this blog post will introduce an OMR library for Java programmers. Aspose.OMR for Java offers features to build an OMR sheet reader in Java programmatically. In addition, we will also go through an online OMR tool so read this article thoroughly.

We will cover the following sections in this blog post:

  1. Aspose.OMR for Java - OMR Library Installation
  2. OMR Sheet Reader in Java - Code Sample
  3. Online OMR Tool

Aspose.OMR for Java - OMR Library Installation

There is a comprehensive guide on installation. So, you can download the JAR file or use the following Maven configurations:

 <repositories>
     <repository>
         <id>AsposeJavaAPI</id>
         <name>Aspose Java API</name>
         <url>https://releases.aspose.com/java/repo/</url>
     </repository>
</repositories>
 <dependencies>
    <dependency>
        <groupId>com.aspose</groupId>
        <artifactId>aspose-omr</artifactId>
        <version>23.12</version>
    </dependency>
</dependencies>
omr library installation

OMR Sheet Reader in Java - Code Sample

We can now start developing an OMR sheet reader software by following the steps mentioned below:

  • Create an object of the OmrEngine class.
  • Invoke the getTemplateProcessor method to get the template processor.
  • Set a custom threshold to use in recalculation whose range is (0 to 100). Lower the value - the fewer black pixels required for a bubble to be counted as filled and vice versa.
  • Loop through the images.
  • Recognize image by calling the recognizeImage method.
  • Call the getCsv method to get the export CSV string and save the CSV to the output folder.
  • Invoke the recalculate method to recalculate recognition results with a custom threshold.
  • Save recalculated results in a CSV file.

The following code snippet demonstrates how to develop an OMR sheet reader in Java programmatically:

You can see the output in the image below:

omr sheet reader software

Online OMR Tool

In addition to an OMR library for Java, Aspose.OMR backs an online OMR sheet reader. So, this free tool is highly secure and scans bubble answer sheets efficiently. Above all, there is no account creation or subscription required. So, you can use it by just dragging and dropping files.

online omr tool

OMR Sheet PNG - Get a Free License

Now, you can avail a free temporary license to try this OMR library beyond evaluation limitations.

Conclusion

This brings us to the end of this blog post. We have gone through what is OMR and the implementation of the building of an OMR sheet reader in Java. Likewise, you can leverage this OMR library to save time and manpower as you can develop your own OMR sheet reader software. In addition, you can visit the GitHub repo to start development. Moreover, you can visit the documentation and API references to learn more about Aspose.OMR for Java.

Help is Available

You can share your questions or queries on our forum.

Frequently Asked Questions – FAQs

Can we check OMR sheet online?

You can use this online OMR sheet reader to check OMR answer sheets.

How to read OMR sheet in Java?

Aspose.OMR for Java is an OMR library that offers rich features to read OMR answer sheets programmatically. See this link to learn how to do it.

See Also