John Zhang
John Zhang

Reputation: 518

Why would tesseract-ocr fail in this case?

I'm trying to use Tesseract to recognize characters in this seemingly simple case:

enter image description here

Yet, the only thing it returns is "5". Why would that be so? Is there anything I can do to fix it? Are there any alternatives (ideally open-source C++) available?

Upvotes: 2

Views: 775

Answers (2)

Mike
Mike

Reputation: 1727

Tesseract is not very good OCR. Also it does not like small images or images with a few characters only. But it is the best open-source OCR, others are worse. Not expensive alternative: http://www.nicomsoft.com/crystalocr/ , expensive (but better): http://www.abbyy.com/ocr_sdk/

Upvotes: 1

nguyenq
nguyenq

Reputation: 8345

The image resolution is too low. Try scan again @ 300 DPI.

Upvotes: 0

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