Hi Jon, The code I have written is in MATLAB. Will you be able to convert it into OpenCV code? Lemme know.
In OpenCV if you apply simple thresholding, it should work. My method (local-minima) is a little complicated (and accurate) then simple thresholding. Therefore, hard to implement in C++ because of interpolation step. I think OpenCV can do this, but we need to have a closer look for this step. Best Regards, Vicky -----Original Message----- From: Jon Andersen [mailto:jande...@gmail.com] Sent: Monday, February 21, 2011 23:42 To: Vicky Budhiraja Subject: Re: Image pre-processing for good OCR results Vicky, Thank you so much for responding! I appreciate your help with this project. I have taken thousands of photos of headstones, and am trying to use Tesseract on them. I will make the results available through findagrave.com, so that people can search for their relatives. Here is a whole directory of sample images: http://freepages.genealogy.rootsweb.ancestry.com/~janderse/cemeteries/Star%2 0of%20David%20Memorial%20Gardens/Garden%20of%20Haifa/ Could you send me the code or results that you found? I am trying to use OpenCV to do the image pre-processing. Thanks!!! -Jon Vicky Budhiraja wrote: > Hi Jon, > > > > Like each morning, I check my emails and I saw those headstones Images from > Graves. I am a God fearing person. So, I was not able to ignore your email. > > > > Regarding the preprocessing step, I suggest to apply Local Minima method for > background removal. However, you might require to adjust your window size in > order to achieve the best results. I did some experiments with the MATLAB > code, and I got some good results. Testing on a larger sample set, may > improve the step. > > > > Please tell me what project you are working on, maybe I will be able to > contribute better? Just lemme know if you need any type of help! > > > > Best Regards, > > Vicky > > > > > > > > From: tesseract-ocr@googlegroups.com [mailto:tesseract-ocr@googlegroups.com] > On Behalf Of Jon Andersen > Sent: Monday, February 21, 2011 07:32 > To: tesseract-ocr@googlegroups.com > Subject: Image pre-processing for good OCR results > > > > Hi, > > > > My project at http://RecordAGrave.com is about recording headstones from > graves and posting the text and images on the Net so that people can > research their family history. I would appreciate some advice on how to > pre-process these headstone images to get the best results from Tesseract > OCR. I have thousands of 1-2 MB jpg images of headstones to process. > > > > Example images: > > http://freepages.genealogy.rootsweb.ancestry.com/~janderse/cemeteries/Star%2 > 0of%20David%20Memorial%20Gardens/Garden%20of%20Haifa%20-%20Raw/IMG_28215.jpg > > http://freepages.genealogy.rootsweb.ancestry.com/~janderse/cemeteries/Star%2 > 0of%20David%20Memorial%20Gardens/Garden%20of%20Haifa%20-%20Raw/IMG_28216.jpg > > http://freepages.genealogy.rootsweb.ancestry.com/~janderse/cemeteries/Star%2 > 0of%20David%20Memorial%20Gardens/Garden%20of%20Haifa%20-%20Raw/IMG_28217.jpg > > I am a software developer so I can script up pre-processing steps to prepare > the input for Tesseract. > > > > Any advice on improving OCR accuracy through pre-processing steps? > > > > Thanks so much, > > > > -Jon > > -- > You received this message because you are subscribed to the Google Groups > "tesseract-ocr" group. > To post to this group, send email to tesseract-ocr@googlegroups.com. > To unsubscribe from this group, send email to > tesseract-ocr+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/tesseract-ocr?hl=en. -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to tesseract-ocr@googlegroups.com. To unsubscribe from this group, send email to tesseract-ocr+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en.
