psr? On Thursday, August 20, 2015 at 3:02:02 PM UTC-4, Allistair C wrote: > > Try different psr too - I got close with psr 6 > > Sent from my iPhone > > On 20 Aug 2015, at 19:59, Amit Rao <rao....@gmail.com <javascript:>> > wrote: > > Thanks. I tried scaling the image horizontally trying different widths and > heights and the best Tesseract could do for 09:43 AM was > > *ocr string = @9243 RH* > > > I'll check out the threads on LCD/clock type reading. Thanks for the > pointer. > > > -amit > > On Thursday, August 20, 2015 at 8:09:58 AM UTC-4, Allistair C wrote: >> >> So another thing you could try ... I notice that everything is >> horizontally compressed. You could try scaling the image horizontally only >> to stretch things out (like I attach). >> >> This would then make the problem similar to those looking to read e.g. >> digital clock text - there are a variety of threads on this group about >> LCD/clock type reading that may then reveal further things you could do >> from that point. >> >> >> >> On 20 August 2015 at 13:03, Allistair <alli...@gmail.com> wrote: >> >>> The font does not look like that - look the shape of the 0 which has a >>> strikethrough in your image but not in Lucinda of the M shape. I am not >>> sure font training will do a lot here, I think it's more the quality of the >>> edges in your image due to the dot matrix printing or however it's printed >>> producing uncertain edges. >>> >>> Perhaps others can chip in. >>> >>> On 20 August 2015 at 10:31, Amit Rao <rao....@gmail.com> wrote: >>> >>>> Thanks, Allistair. I was guessing that this font was similar to Lucida >>>> Console. e.g. >>>> >>>> >>>> https://www.google.com/search?q=lucida+console+font&espv=2&biw=1174&bih=761&tbm=isch&tbo=u&source=univ&sa=X&sqi=2&ved=0CCUQsARqFQoTCKrkzcypt8cCFQddHgod7XsPDw#imgrc=H27K5k9g7hx19M%3A >>>> >>>> However, I don't know for certain what font this is and I don't know of >>>> a tool that will help me know for sure which font the image uses. The only >>>> text I am really interested in is "HH:MM AM/PM" but if I crop the image to >>>> include only the time Tesseract is still not able to read it similar to >>>> what you reported.. I cropped the image to include 09:43 AM and it reads >>>> it >>>> as *@9243 Rh* >>>> >>>> If this is a font that Tesseract does not recognize would it help >>>> augmenting the training data set with data from images with this format >>>> and >>>> font? >>>> >>>> Thanks, >>>> amit >>>> >>>> >>>> >>>> On Thursday, August 20, 2015 at 4:34:25 AM UTC-4, Allistair C wrote: >>>>> >>>>> Which Lucinda font do you think this is? All Lucinda fonts I see in a >>>>> Google Image search are nothing like this. >>>>> >>>>> You're right, this does not OCR well. In fact, if you just crop out a >>>>> part of it to remove other noise, say, 09:43 AM, even with lots of margin >>>>> Tesseract isn't even finding anything it thinks looks like text in normal >>>>> page segmentation. >>>>> >>>>> The best I got (for the cropped out time) was: >>>>> >>>>> 39:43 HH >>>>> >>>>> So 28% incorrect. >>>>> >>>>> The definition of the 'M' is quite eroded already which is not great. >>>>> >>>>> >>>>> >>>>> On 20 August 2015 at 08:29, Amit Rao <rao....@gmail.com> wrote: >>>>> >>>>>> HI folks, >>>>>> >>>>>> I am using Tesseract IOS SDK to OCR parking stubs. The parking stubs >>>>>> are primarily in 2 formats. Tesseract does quite well on one of the >>>>>> formats >>>>>> but the OCR text >>>>>> for the second format is pretty much useless. I have attached the >>>>>> image that Tesseract is unable to OCR. If someone is able to report any >>>>>> success with OCRing this image >>>>>> I would really appreciate it. So far I have tried the following but >>>>>> they do not help with the OCR results. >>>>>> >>>>>> 1. Cropping the image >>>>>> 2. Reducing the height and width of the image with same/different >>>>>> aspect ratio >>>>>> 3. Binarizing the image into black and white >>>>>> 4. Filtering the image to smoothen the image. >>>>>> >>>>>> I haven't tried augmenting the training data set yet. The font seems >>>>>> to be pretty standard (Lucida) and my understanding is that unless the >>>>>> fonts are non-standard >>>>>> augmenting the training data will not be very useful. >>>>>> >>>>>> Your help/suggestions will be greatly appreciated. >>>>>> >>>>>> Thank you, >>>>>> Amit Rao >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> 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-oc...@googlegroups.com. >>>>>> To post to this group, send email to tesser...@googlegroups.com. >>>>>> 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/f7ed92d0-6448-48c8-a404-774965d9b35a%40googlegroups.com >>>>>> >>>>>> <https://groups.google.com/d/msgid/tesseract-ocr/f7ed92d0-6448-48c8-a404-774965d9b35a%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-oc...@googlegroups.com. >>>> To post to this group, send email to tesser...@googlegroups.com. >>>> 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/82e43d56-d3f1-480f-a6d1-10cde2afa7b5%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/tesseract-ocr/82e43d56-d3f1-480f-a6d1-10cde2afa7b5%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-oc...@googlegroups.com <javascript:>. > To post to this group, send email to tesser...@googlegroups.com > <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/144c2438-f161-4903-8863-47c6c831c340%40googlegroups.com > > <https://groups.google.com/d/msgid/tesseract-ocr/144c2438-f161-4903-8863-47c6c831c340%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 http://groups.google.com/group/tesseract-ocr. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/27612917-16d7-48d3-a367-3efc253e548c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
