Looks like the image resolution is not set correctly. You can specify dpi while processing.
ubuntu@tesseract-ocr:~/TEST$ tesseract 82.png - --dpi 300 82 ubuntu@tesseract-ocr:~/TEST$ tesseract 81.png - --dpi 300 81 On Thu, Apr 30, 2020 at 2:57 PM tristan gordon <tristan.gor...@gmail.com> wrote: > Hello all, > > Could you help? > > Attached are two images containing two numbers, 81 and 82, which I am > attempting to get Tesseract OCR to read. > > Each time Tesseract OCR is returning empty page and producing an empty > text.txt document. > > The error is displaying as follows: > > # tesseract 82.png out > Tesseract Open Source OCR Engine v4.1.1-rc2-20-g01fb with Leptonica > Warning: Invalid resolution 0 dpi. Using 70 instead. > Estimating resolution as 1622 > Empty page!! > Estimating resolution as 1622 > Empty page!! > > How can I get the numbers to output? Are any changed required to the > images or to tesseract? > > These images have been produced using Centos 7, Apache, PHP and Imagick. > Retrieving the image from an external server, then processing the image > using Imagick to crop, grayscale, trim to focus area, resize, smooth edges, > remove background, set image to black and white, flatten the image, set a > resolution and image format. > These images have then been saved (for development purposes) and tested > using the above. > > Once these errors are sorted and it's running, tesseract-ocr-php will > complete the process on the fly (as there's around 6000 images to read). > > Let me know. > > Thank you (in advance). > > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/tesseract-ocr/2314316b-1b5c-4a44-b9bb-8e65a901a688%40googlegroups.com > <https://groups.google.com/d/msgid/tesseract-ocr/2314316b-1b5c-4a44-b9bb-8e65a901a688%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- ____________________________________________________________ भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/CAG2NduUtA6_rZezjmUth7GQr%3DPvN21h6O_Lrbzn0g%3Dp7P%2BhSdA%40mail.gmail.com.
