Tagged Questions

Tesseract is an optical character recognition engine(OCR)

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1
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0answers
26 views

Turn Off Dictionary in Tess4J

The accuracy of character recognition in my tess4j OCR application is very low. I have heard that turning off the dictionary in tess4j will increase the accuracy by letting individual characters to be ...
0
votes
1answer
56 views

Use ffmpeg for JPEG to TIFF conversion

I would like to use Tesseract OCR with a video. With ffmpeg I can export some (.jpeg) images from a video. Can I convert a .jpeg into a valid .tiff or export directly .tiff images from the video with ...
0
votes
0answers
59 views

Tesseract on linux

How to solve the problem without having to install tesseract 3.03 when I get a warning: Warning: You are running an unsupported version of Tesseract. Expecting version 3.03, your version is: ...
0
votes
0answers
515 views

Tesseract couldn't load any languages

Running tesseract makebox command produced me the following error Error opening data file /opt/local/share/tessdata/eng.traineddata Please make sure the TESSDATA_PREFIX environment variable is set to ...
5
votes
1answer
661 views

Tesseract OCR : Unsupported image type

I converted the PDF to TIF file using the following commands on terminal convert -density 300 -depth 4 lang.font-name.exp0.pdf lang.font-name.exp0.tif convert lang.font-name.exp0.tif -colorspace rgb ...
0
votes
0answers
28 views

Canadian or British language data for Google Tesseract?

Is there a language pack / OCR dictionary for British or Canadian English to be used with Google Tesseract? The generic English training set uses American English and it's inconvenient to use due to ...
0
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2answers
407 views

Tesseract 3.03 english language data

Tesseract 3.03 have been released recently and I have just installed it. Nevertheless, English language data is not provided with the download (from ...
0
votes
0answers
191 views

How to install ruby tesseract on linux mint(after following instructions I keep getting a compilation error)

Hi I'm trying to install ruby tesseract on linux mint OS. I've installed tesseract and ruby teseract-ocr but every time I try I require the gem I get this compilation error: CompilationError: compile ...
0
votes
1answer
540 views

OCR with non-language text

I am interested in using OCR to recognize text from a document that doesn't contain words. Rather, it is a document with a long string of "random" printed characters. I have been trying to use ...
2
votes
1answer
432 views

Tesseract hocr and txt at the same time, or converting from Tesseracts hocr to txt

I've been playing around with Linux OCR software, and I really like Tesseract, especially in conjunction with gsan2pdf. Tesseract v3 or greater supports outputting in the hocr format, and gscan2pdf is ...
0
votes
2answers
518 views

Unable to process GIFs with Tesseract in OSX

Getting the following error: Tesseract Open Source OCR Engine v3.02.02 with Leptonica Error in pixReadStreamGif: function not present Error in pixReadStream: gif: no pix returned Error in pixRead: ...
1
vote
1answer
141 views

TesseractOCR custom training

I don't get it how am I supposed to tell Tesseract that this is actually a b c letters? Appending makebox in cli, produced this file: C 78 127 104 166 0 l 96 127 118 166 0 . 116 127 126 140 0 - 124 ...
1
vote
3answers
2k views

OCR Tesseract, Empty page error?

I compiled it from sources with leptonica. This is a png image with transparent background, which I edited adding a blue color and still this error: Tesseract Open Source OCR Engine v3.02.02 with ...
2
votes
0answers
126 views

Tesseract can't scan `Error:Only 1,2,4,5,6,8 bpp are supported:32`

Even though I did convert canvas.png -depth 8 canvas.tif I am still seeing this error message: Tesseract Open Source OCR Engine check_legal_image_size:Error:Only 1,2,4,5,6,8 bpp are supported:32 ...
0
votes
1answer
100 views

gImageReader Clipboard doesn't work on Windows

I'm using gImageReader to do some OCR on Windows 7, and though I can copy from within the application itself, I can't copy to the external Windows 7 clipboard. I believe the program is gtk based, and ...
0
votes
3answers
3k views

Install tesseract ocr 3 on OSX

I am trying to install Tesseract OCR on OSX 10.6... I have got as far as installing leptonic (by downloading src from http://www.leptonica.org/download.html and installing with ./configure; make; ...
3
votes
1answer
2k views

Training Tesseract-OCR for english language fonts

I have about 3000 small images of single words that I am trying to convert to text. I have installed tesseract on my windows 7 machine using the installer and successfully managed to OCR images ...
1
vote
1answer
4k views

Why does Tesseract CLI show 'cannot create output file' on Windows 7?

I have installed (Or at least I think I ran an installer) tessearct-ocr on my my machine running 64-bit Windows 7. I am trying to interact with the program through cmd. to convert a .png image to ...
1
vote
1answer
749 views

Tesseract OCR - Newbie Questions!

I just installed Tesseract OCR and was able to convert a TIF image to its corresponding text. The application seems fairly easy to use, but I am struggling finding the documentation that will help me ...