Hello. How to improve OCR recognition for these images (OpenCV):

[image: d.jpg]

[image: b.jpg]

[image: c.jpg]

[image: a.jpg]

OpenCV, bluring, inverting,scaling,binarisation does not help( 
<https://github.com/tesseract-ocr/tesseract/wiki/ImproveQuality#inverting-images>
Only numbers! Thanks!!!



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