Hi Tom, the compression artifacts are of course easy to avoid, but the “ghosting” in the image is definitely a severe problem. I noticed that, too, but I have no idea what the reason could be. Again, a different AD converter could help. I already tried to clean the “ghosting”, but had no success.
Another interesting fact, I found a different OCR solution called "https://ocr.space/";, which seems to handle my kind of images pretty well. It's not a free service (decent free tier, tough), but that could be an alternative solution, if I can't manage to get a better image quality. I would still prefer a local solution with tesseract, will post my updates. Greetings, Chris On Sunday, November 13, 2022 at 9:12:57 PM UTC+1 tfmo...@gmail.com wrote: > The image has "mosquito noise" around the characters which indicates that > it's been compressed with JPEG or similar algorithm. You should definitely > try to avoid any compression at this low a resolution. > > I think your idea of investigating different video capture devices is a > good one. It looks to me like there is horizontal "ringing" or an echo in > the signal which is showing up as two ghost images slightly offset from > each other in the X axis. With a clean signal you'd have a much easier > time. If you are forced to deal with this, you can construct your filter > matrices to operate in the X axis, but leave the Y axis untouched. > > Tom > > On Saturday, November 12, 2022 at 12:57:55 PM UTC-5 goaf...@gmail.com > wrote: > >> Hi, >> >> I want to OCR this kind of image, which is from a video grabber, >> unfortunately of pretty bad quality. With the default options of tesseract, >> it's pretty useless. >> Before I start digging deeper into training tesseract, I would love to >> hear some recommendations. Would it be possible to achieve a good result >> from this kind of image with proper training? >> Any further ideas/tips would be appreciated! >> >> Greetings, >> Chris >> >> [image: temp2.jpg] >> >> -- 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/1918b0ba-db56-4fd9-af3e-7079445757c0n%40googlegroups.com.
