The whitelist feature is currently not working in Tesseract 4.0.0.
https://github.com/tesseract-ocr/tesseract/issues/751
On Sunday, February 24, 2019 at 11:21:17 AM UTC-6, Nenad Kocev wrote:
>
> Hello, I recently discovered Tesseract and I've been using it to extract
> digits from images using tess4j library. With the settings posted bellow I
> get around 85% accuracy of recognition.
> Is there a way to get 100% accuracy. I have example of an image in the
> attachments. Other images may differ only in number of digits they have and
> may also contain special characters like ",+-". Thanks for your help.
>
> Settings:
>
> tesseract.setPageSegMode(7); // text is in single line
>
> tesseract.setTessVariable("tessedit_char_whitelist", ",+-0123456789");
> tesseract.setTessVariable("load_system_dawg ", "false");
> tesseract.setTessVariable("load_freq_dawg ", "false");
>
>
>
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