1. IronOCR
  2. Troubleshooting
  3. 7 Segment Digital/LCD Displays

How to Read 7-Segment Digital LCD Displays with OCR

Curtis Chau
Curtis Chau
Updated:

Can IronOcr read 7-segment digital displays?

Seven-segment digital display text has multiple breaks in each character, which is the opposite of what standard OCR programs are looking for — this is called the character separability principle.

Some image pre-processing would be necessary to blur the characters, removing the breaks.

For deeper processing to achieve reliable OCR results, we recommend ImageMagick for .NET as a free and very well-documented tool with filters comparable to Photoshop. You can find the package here: Magick.NET-Q8-AnyCPU.

https://www.nuget.org/packages/Magick.NET-Q8-AnyCPU/

IronOCR can also use custom language packs, so you might try the LetsGoDigital Tesseract language pack, which is specifically tuned for 7-segment displays: Tesseract_sevenSegmentsLetsGoDigital.

For more information on adding a custom language pack in IronOCR, visit IronOCR Language Guide.

Curtis Chau
Curtis Chau
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Technical Writer

Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.

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