Low-resolution images can come from a variety of sources, but the most common source is probably screen capture. Screen capture images are usually 96 DPI on Windows. (This can vary depending on the user settings). Additionally, image representations of incoming faxes may also be considered low-res and fall under the resolution threshold acceptable for OCR. Typically, OCR engines require images of 200 or 300 DPI in order to achieve acceptable results.

Change Image Resolution

One easy solution for images that do not have noise or have complex structures is to change the resolution of the image before OCRing the image. This C# sample shows you how, then it gets the text from the image and outputs it to the console.

As part of the LEAD Technologies 25th anniversary, we are creating 25 projects in 25 days to celebrate LEAD's depth of features and ease of use. Today's project comes from Nathan.

Download the Project

Last year, as part of our 25 projects in 25 days, we created a MeteorJS app to perform OCR using the LEADTOOLS web services.

LEADTOOLS provides fast and highly accurate Optical Character Recognition (OCR) SDK technology for .NET (C# & VB), C/C++, WinRT, iOS, OS X, Java, and web. Developers around the world are leveraging the LEADTOOLS SDK to add high-performance OCR and document processing to their applications across all of the platforms in their enterprise, including server, desktop, and mobile devices.

OCR is a very processor intensive process, so native OCR on servers and desktops is expected. But, did you know that LEADTOOLS OCR also runs natively on Windows Phone, Android, and iOS? To test the performance of LEADTOOLS OCR on your our device, we have created several applications and put them in the respective app stores. These apps can OCR images stored on the device or taken with the camera in order to extract text or convert to a text based document format such as PDF or DOC.
Features include:

Enterprise Content Management (ECM) and eDiscovery aren’t necessarily all that new, but it’s becoming increasingly important to implement due to the continuing transition into a digital age. Businesses, especially large corporations, have a massive amount of electronically stored information (ESI) that they would be wise to retain for future possible legal ramifications, so the stakes are high.