Dmitri, you're right I need to get better quality pictures first. i will work on it and hopefully come back with better ones
thanks! On Monday, May 18, 2015 at 8:03:00 AM UTC-4, Dmitri Silaev wrote: > > Hi James, > > Here I think more effort needs to be taken for getting better source > images. In principle, there are two alternatives: > - Get a good quality source image. Then you'll be able to handle it by > means of relatively simple preprocessing. Maybe using ImageMagick. Probably > you'll be able to use Tesseract. > - Let any arbitrary image to get to your pipeline. Prepare to develop (or > order from a 3rd party) complex image processor, full-fledged programming, > etc. > > If you choose to go with the first, I suggest the following to be improved > to simplify further OCR: > - Don't use JPEG. Because of that, there's massive bunch of compression > artifacts in each of you images. Use lossless PNG instead. > - Improve lighting. Too dark shots result in overwhelming noise. Either > external or use flash. Beware of flares, though. Experiment in order to get > best shots. > - Try to hold camera evenly when shooting (fronto-parallel projection). > Otherwise you'd need perspective correction as a preprocessing step. Or at > least skew correction. > - LCD display area to occupy as much as possible area of the image, > centered. Otherwise you'd need background removal, ROI detection or devise > heuristics for locating reference points in the image. > > If you fix all of the above, you'll probably be able to manage with the > homemade ImageMagick scripts and Tesseract. You can send your sample images > again, so that we can discuss what can be done further. > > There's a number of training attempts for LCD display fonts on the > internet - look for them. They seem to address fonts similar to yours, but > in the end you'd probably need to train yourself. > > Best regards, > Dmitri Silaev > www.CustomOCR.com > > > > > > On Thu, May 14, 2015 at 8:17 PM, James Okken <[email protected] > <javascript:>> wrote: > >> Dmitri, >> >> thanks very much for your response. any help would be huge! >> anything you suggest for LCD segments would be huge too! >> >> I've attached more of the original images. >> >> thanks >> >> On Thursday, May 14, 2015 at 3:41:14 AM UTC-4, Dmitri Silaev wrote: >>> >>> Hi James, >>> >>> I can suggest a number of steps regarding connected component analysis >>> but it's better you'd show the original photo images. Probably there are >>> easier ways to get the numbers from them. Be aware also that Tesseract >>> might not be the best way to read LCD segment displays. It can work well >>> for you, though; it depends on source image specifics. Attach several >>> samples. >>> >>> Best regards, >>> Dmitri Silaev >>> www.CustomOCR.com >>> >>> >>> >>> >>> >>> On Wed, May 13, 2015 at 8:31 PM, James Okken <[email protected]> wrote: >>> >>>> hi everyone. >>>> >>>> can tesseract pull the numbers off this thermostat picture attached? >>>> I've tried a number of things including making the photo a better quality, >>>> to no avail. >>>> >>>> any help would be appreciated! thanks!! >>>> >>>> -- >>>> 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 [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/tesseract-ocr. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/tesseract-ocr/0de8f0b4-dff2-44f0-bd91-bd0403e4d130%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/tesseract-ocr/0de8f0b4-dff2-44f0-bd91-bd0403e4d130%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 [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at http://groups.google.com/group/tesseract-ocr. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/tesseract-ocr/41f963d3-e28b-47c2-a65e-c50ccef95530%40googlegroups.com >> >> <https://groups.google.com/d/msgid/tesseract-ocr/41f963d3-e28b-47c2-a65e-c50ccef95530%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. 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