I know I'm a bit late to the party, but I came across this and thought I
should post my approach to this problem. I published a paper on it and it
can be found at:
Christiansen, Cameron S., and William A. Barrett. "Data acquisition from
cemetery headstones." IS&T/SPIE Electronic Imaging. Intern
On Sun, Feb 20, 2011 at 6:02 PM, Jon Andersen wrote:
> 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 thes
Dear Jon,
Beginning for analyzing; I try also to detect lines, corners; but results
are not good. I think due to images are low contrast.
Please try to analyze with some data line profiles:
ROI-left-profile:
https://picasaweb.google.com/congnguyenba/TesseractBasedOCR#5576706091073985
3
: Re: Image pre-processing for good OCR results
Hello,
A few comments from my side, sorry for being disordered, but I have not much
time right now.
In OpenCV you can use thresholding with the Otsu algorithm, it's not
documented in the documentation of the threshold function, but the paramet
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
> proje
Hello,
A few comments from my side, sorry for being disordered, but I have not much
time right now.
In OpenCV you can use thresholding with the Otsu algorithm, it’s not
documented in the documentation of the threshold function, but the parameter
is CV_THRESH_OTSU.
Otsu thresholding involves the
On Feb 20, 9:02 pm, Jon Andersen wrote:
> My project athttp://RecordAGrave.comis 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 t
Jon,
You will certainly need to implement mostly the steps that Cong Nguyen
suggests. However complications arise if you wish to do pre-processing
in a pure automatic way. You are going to precess real photographic
images, and therefore fonts, backgrounds, lighting conditions, etc.
differ much. An
;
>
>
>
> *From:* tesseract-ocr@googlegroups.com [mailto:
> tesseract-ocr@googlegroups.com] *On Behalf Of *Kip Hughes
> *Sent:* Monday, February 21, 2011 10:00
> *To:* tesseract-ocr@googlegroups.com
> *Subject:* Re: Image pre-processing for good OCR results
>
>
>
&g
groups.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
> gr
-processing for good OCR results
Whoops, sorry - links were broken for a bit. I just fixed the image links,
they should work now.
Thanks!!
-Jon
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Kip Hughes
Sent: Monday, February 21, 2011 10:00
To: tesseract-ocr@googlegroups.com
Subject: Re: Image pre-processing for good OCR results
Hi Vicky,
I have an interest in theology and just wanted to know which of the god(s)
are you "god fearing" of? In my experience, the phrase "g
gt;
>
> *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,
>
Whoops, sorry - links were broken for a bit. I just fixed the image links,
they should work now.
Thanks!!
-Jon
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Jon,
I don't know if it's intended but all your links to images report
"We're sorry. The page you tried to access is not available". In that
way nothing can be advised on your issue...
Warm regards,
Dmitry Silaev
On Mon, Feb 21, 2011 at 5:02 AM, Jon Andersen wrote:
> Hi,
> My project at htt
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
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
O
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