Honestly I wouldn't bother with the complex solutions to get precise progress callbacks - the estimation method based on past scans works really well. You can see it with ScanBizCards (free versions available for iOS, iPad, Android): right after you install the app you'll notice that the progress animation may not be accurate (i.e. the scan may jump to 100% complete straight from say 70% done or get stuck at 100% done for a second) but after scanning a couple of cards it will match actual progress quite well.
Patrick On Fri, Jan 11, 2013 at 10:26 AM, <[email protected]> wrote: > Patrick > > thanks. your idea is sort of good so far. > > I roughly looked through the source code and found nothing . > > it seems that there's no event or callback function relative to OCR > progress . > > > > On Friday, January 11, 2013 9:45:07 PM UTC+8, Patrick Questembert wrote: >> >> I don't know what callback mechanisms exist in Tesseract but you could >> use the lower-level APIs to first get blocks and rows then do the >> recognition for each row separately. Or, simpler, just keep track of how >> long it takes your app to complete the OCR as a function of image size and >> assume the next image will follow the same performance stats. >> >> Patrick >> >> On Fri, Jan 11, 2013 at 2:44 AM, <[email protected]> wrote: >> >>> >>> sometime it takes a long time to run OCR >>> >>> so how to get the progress during OCR? >>> >>> thanks ! >>> >>> I'm using Tesseract3.02 win7 b4bit VS2010 >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "tesseract-ocr" group. >>> To post to this group, send email to [email protected] >>> To unsubscribe from this group, send email to >>> tesseract-oc...@**googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/**group/tesseract-ocr?hl=en<http://groups.google.com/group/tesseract-ocr?hl=en> >>> >> >> >> >> -- >> Patrick Questembert, *ScanBizCards* >> +1-917-250-4177 | www.scanbizcards.com >> twitter.com/ScanBizCards | >> www**.facebook.com/ScanBizCards<http://www.facebook.com/ScanBizCards> >> Just released: Power Contacts - http://itunes.apple.com/us/** >> app/power-contacts/**id476986356?mt=8<http://itunes.apple.com/us/app/power-contacts/id476986356?mt=8> >> > -- > You received this message because you are subscribed to the Google > Groups "tesseract-ocr" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/tesseract-ocr?hl=en > -- Patrick Questembert, *ScanBizCards* +1-917-250-4177 | www.scanbizcards.com twitter.com/ScanBizCards | www.facebook.com/ScanBizCards Just released: Power Contacts - http://itunes.apple.com/us/app/power-contacts/id476986356?mt=8 -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en
