Re: [tesseract-ocr] Improving accuracy on recognition Tesseract 4.3.1
Hello,
You can try the OCR preprocessing in spark NLP, if you are on Python or
Scala.
Try to use the scaling option.
Alberto.
On Feb 24, 2019 2:21 PM, "'Nenad Kocev' via tesseract-ocr" <
tesseract-ocr@googlegroups.com> 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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[tesseract-ocr] Re: Improving accuracy on recognition Tesseract 4.3.1
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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[tesseract-ocr] Improving accuracy on recognition Tesseract 4.3.1
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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