OMR SDK Libraries

LEADTOOLS provides fast and accurate Optical Mark Recognition SDK libraries for .NET (C#, VB, Core, Xamarin, UWP), C, iOS, macOS, Linux, Java, and web developers. Leverage the LEADTOOLS OMR toolkit to rapidly develop robust, high-performance recognition applications that detect whether boxes are checked and bubbles are filled within surveys and tests, saving time and money over manual data entry and inspection.

A-to-Z OMR Libraries

The LEADTOOLS OMR libraries automatically detect and process large numbers of test sheets and surveys with hundreds of bubbles. The OMR APIs provide AI-powered components that automatically detect structured and loosely structured bubble layouts that help end-users to rapidly define master form templates by clicking and dragging over large multiple-choice bubble groups.

No Specialized Processing Equipment Necessary

LEADTOOLS OMR libraries do not restrict your end-users to using specific OMR form designs that require specialized equipment to be processed. This is important so that you are not locked into a vendor specific form.

OMR Statistics and Comparison

LEAD's OMR libraries evaluate forms and surveys to calculate grades for tests and detailed statistics for surveys. LEADTOOLS OMR API automatically compares marked tests against an answer key to calculate grades.

Fast, reliable, and accurate OMR libraries

Unbeatable Speed and Reliability

LEAD is continuously optimizing its OMR libraries to ensure that they are as fast and reliable as possible. This makes the API perfect for applications that range from unattended large volume document batch processing to converting single and multipage documents with manual review. Because LEADTOOLS has libraries for multiple platforms, these applications can run on mobile devices, workstations, servers, and in the cloud. LEADTOOLS makes the most of the hardware made available to it.

Cross-Platform OMR Libraries

There is practically no limitation to where you can deploy a solution that uses LEADTOOLS OMR libraries. No matter if you need an OMR solution for desktops, servers, or mobile devices running Windows, Linux, macOS, iOS, Android, or even in a web browser, LEADTOOLS has you covered. The libraries even provide specialized image processing to handle common deformations, such as 3D perspective skew and keystone effect, that occur snapping pics on mobile devices and digital cameras.

Mixed Zone Recognition

Recognizing that automation and efficiency are at the forefront for developers building OCR solutions, LEAD has mixed mode AutoZone capabilities to extract text from images that contain a mix of machine-printed text, handwritten text, MICR, MRZ, OMR, graphics, and table zones. LEADTOOLS automatically detects and recognizes everything. This powerful combination of OCR, ICR, and other advanced recognition technologies is critical for companies that need to quickly and accurately process various form types regardless of how the data is formatted.

Other Industry-Leading Recognition Libraries

For the past 22 years, LEAD's recognition libraries have been used by thousand of developers and millions of end-users throughout the world. The patented machine learning algorithms that drive these engines bring unparalleled accuracy, speed, and reliability to all of the LEADTOOLS recognition libraries, including the OMR API library.

Other recognition libraries and components include:

Easy to Integrate

LEADTOOLS handles the heavy lifting — eliminating months of R&D, while giving you the best quality and performance available. This leaves you free to focus on other components of your application. Download the evaluation and start coding to get an idea of how much more streamlined your development will be using LEADTOOLS.

OMR SDK Platforms and Programming Interfaces

Projects that use LEADTOOLS OMR libraries can be deployed to web browsers, Windows, macOS, iOS, Android, and Linux devices.

OMR SDK libraries are available for

.NET, .NET Core, UWP, Xamarin
- C#, VB, C++/CLI
- WinForms, ASP.NET, XAML
C API
HTML/JavaScript
Web Services - JSON, WebAPI, SOAP, RESTful
iOS & macOS - Objective-C, Swift, .NET Core, Xamarin, Java
Linux - C/C++ , Java, .NET Core
Android - Java, Xamarin

Start Coding With LEADTOOLS OMR

OMR libraries for Windows, Linux, and macOS as well as all LEADTOOLS Recognition, Document, Medical, Vector, and Imaging technologies for all development and target platforms.

Download LEADTOOLS Libraries

Documentation

See What People are Saying About LEADTOOLS

Paliscope

"We started to work with LEADTOOLS to add very powerful OCR functionality to our product. LEADTOOLS has been very supportive and easy to work with during our development allowing us to create an even better product!"

Christian Berg

Founder and CEO

InnerActive

"We needed high quality OCR libraries and text extraction for various file types. LEADTOOLS proved to be the perfect fit for our application, and the support team is outstanding."

Win Worcester

Lead Developer

page one GmbH

"As a solution provider, we always want the best for our customers. Thanks to the LEADTOOLS SDK modules, we were able to expand our solution quickly and easily to include functions such as barcode recognition."

Christian Eder

Head of Software Projects

"We use LEADTOOLS Imaging Pro Developer Toolkit for more than 20 years. The library is working fast and reliable. For so many years we have experienced no major issues. And this is important as rendering and image processing is a core function of the Document Management system that we provide to our customers."

Markus Koelmans

Vice President Research & Development and Quality

“As a long-time customer of LEADTOOLS, we’ve been using LEAD’s OCR engine to extract information from incoming faxes to be stored in our database. LEAD’s OCR technology has allowed us to improve our internal workflow and organization of our records.”

David Revell

CIO

“In need of new tools for encoding and decoding MPEG2, MPEG4, WMV, and H.264, we found LEADTOOLS Multimedia SDK. With their robust toolkit and flexible support and sales teams, LEADTOOLS has been integrated within Pipelogix and we’ve been satisfied customers since 2005.”

Jeremy Wagner

President

“Thanks to LEADTOOLS, we were able to easily integrate top-notch Document, OCR, and PDF functionality into our Merge Document Management paperless office solution.”

Kelly Reiman

Business Analyst, R&D

“KS21 Software & Beratung GmbH uses the Leadtools Imaging Pro SDK to capture image documentation on the construction site and to support order planning and order processing. With Unirent and LEADTOOLS we found two strong business partners for the implementation of further documentation and processing mechanisms and look forward to future projects with the help of your products.”

Oliver Raepple

Product Management

“eDOC Aviation Solution AG specializes in software solutions for complex technical documentation. Both in our flagship applications ‘eDoc’ for document management and paperless records management and in our solutions for data extraction in special cases, we need a powerful OCR and the ability to read, edit and create PDF. LEADTOOLS provides a high-performance and reliable library with a modern API for this purpose.”

Development Team

“Using LEADTOOLS Document SDK we were able to quickly develop a customized scanning application to handle the large quantity of files our employees process, store, and transfer daily.”

Andrew Bush

Developer

"We have leveraged the LEADTOOLS Document and PDF toolkits within our records management software for many years. The quality of both their components and their customer relationship team really sets them apart from other vendors."

David Hall

Poject Supervisor

"Our eDiscovery software needs to be able to process, extract and store data from thousands of sensitive client files. LEADTOOLS Document and OCR libraries have been invaluable to our development team since 2009"

Chris Waterman

Director of Software Development

"Integrating LEADTOOLS OCR and Recognition libraries into our scanning solutions have given our developers truly powerful technology and access to a reliable customer support team."

Torin Ford

Senior Software Engineer

"Making the decision to integrate LEADTOOLS was easy because of their reliable and convenient DICOM libraries. Their intuitive API helped us shrink our development time and hit our deadlines. The code samples provided on their website are extremely helpful, and to back it up they also have direct technical support to help answer any other questions."

J.W. Chang

Engineer

BMedley.org

"The LEADTOOLS SDK's high-level interface is a joy to work with and works on Linux when I develop on Mac!"

Brian Medley

Developer

"LEADTOOLS has been integrated within our document management platform, VirPack, for over 20 years. LEAD’s document conversion and annotation libraries allowed our development team to hit the ground running when building and optimizing the virtual file and workflow automation capabilities that our product provides."

Michael J. Coar Jr.

CEO

"We have been using LEADTOOLS development toolkits for over 15 years. Their customer support and development teams have been extremely responsive to all of our technical needs. Their DICOM capabilities have ensured our ability to provide DICOM communications services for our application, and has been able to help us expand our DICOM feature set over the years."

Tony Molinari

Vice President

"After difficulties using other tools, we were in the market for DICOM libraries from a trusted company, supported by high quality technical support, and rich in features and functionality. LEADTOOLS solved all of our problems with their Medical SDK and they provided us with excellent customer service!"

Mr. S. K. Lee

Head of Software

LG Electronics

“To achieve DICOM compliant interoperability between our PACS server, MWL server, and other DICOM devices and services, we chose LEAD for their well-known and trusted LEADTOOLS DICOM libraries. I highly recommend LEADTOOLS for establishing interoperability with DICOM medical devices and equipment.”

Mr. J. W. Park

LG Electronics