you can do Lense Correction.
On Thursday, July 30, 2015 at 6:44:55 PM UTC+5:30, Nohinn wrote: > > Hello, > > I've been trying some pre-processing techniques, etc. to get the best > result with tesseract ocr. But I'm getting some errors on parts of data. > I'm using AForge libraries for C#. > > The image I'm using is this one: > > > <https://lh3.googleusercontent.com/-0FtXGLwCKnE/Vboc6S32bHI/AAAAAAAADrc/HZ5Jmmsmfj0/s1600/IMG_20150724_192936.jpg> > > > These are the steps I'm doing right now: > > 1) Detect where the text starts and crop to avoid any issues when I > binarize the image > > 2) Apply a Median filter (processing square size of 3) > > 3) Apply gaussian sharpen (0.6 sigma) > > 4) Apply brightness correction (6 adjustValue) > > 5) Apply contrast stretch > > 6) Apply contrast correction (3 factor) > > 7) Apply saturation correction > > 8) Convert image to grayscale > > 9) Apply gamma correction (0.85 gamma) > > 10) Apply a bradley local thresholding > > 11) Get skew angle > 12) Apply opening filter > > 13) Rotate image with angle obtained from step 11 > > 14) OCR > > > Result: > > CAFETERIA ESCLAT > > AV.LLuis Companys,s/n.— T]f.934 772 965 j > > FCO.GONZALEZ CASTRO > > SANT JOAN D' ESPI > > NIF:09747552Z-IVA NCLUIDO > > TICKET 617431 > > VIE 24 JUL 2015 16:07 > > Cant Descripcion P.U. Tatil > > 2 MENU iiiiiiiii 10.00 20.00 > > l CAFE CON LEUHE 1.30 1.30 > > 1 CAFE 1.10 1.10 > > TOTAL 22.40 > > EFECTIVO 22.40 > > **BASE IMPONIBLE 20.36 IVA 10% 2.04 ** > > ... GRACIAS POR SU VISITA ... > > JERU CAJA 1 > > > > > Is there anything I could do to improve the output? > > 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/b7c3efaf-1c38-4d5b-a43c-857f360640e5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
