I believe Tesseact uses Otsu algorithm to find a single threshold value. The threshold is used to set gray pixels to binary values depending on whether a gray level is below or above the threshold. I use Leptonica for my own pre-OCR image processing and the performance seems to be fine.
On Sat, Jan 26, 2019 at 9:54 AM Scott Thibault <sathiba...@gmail.com> wrote: > I want to do my own pre-processing including binarization so I can remove > borders and other artifacts. However, the performance seems to be worse. > Perhaps Tesseract has better binarization? What algorithm does it use? > > --Scott > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to tesseract-ocr+unsubscr...@googlegroups.com. > To post to this group, send email to tesseract-ocr@googlegroups.com. > Visit this group at https://groups.google.com/group/tesseract-ocr. > To view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/2aac2250-cbaa-4b7a-bef0-ca1acf13d5f4%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/2aac2250-cbaa-4b7a-bef0-ca1acf13d5f4%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscr...@googlegroups.com. To post to this group, send email to tesseract-ocr@googlegroups.com. Visit this group at https://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAAMcHAG1gUeM7XrK1pxy43RjDP7Txahii7bp8q2hnhfOHCx1-A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
