1

original image

1

I think recognize the digits from this image would be really easy, but it just can't be recognized by tesseract and a lot of online OCR. Then I process it like this.

process image

2

Unfortunately it still can't be recognized by the tesseract.

My tesseract parameter:

tesseract input output digits -psm 7

That only returns a single dot .

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3

The images are too small for it to properly work. I took your images and simply scaled them up to a height of 50px (constant resolution) and ran

tesseract input output -psm 7

First Images

My output resulted in

4 5 3 6 9 8 7 2 1 0

I did the same with your single 4, and before it got a . character as you did. Resized it and it worked fine.

Depending on your circumstances you may need a command line image resizing utility such as Imagemagick to process them.

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