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Questions tagged [leptonica]

Leptonica is open source software used for image processing and analysis.

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Ephesoft can't learn or extract certain tif image (not all image)

I'm using Ephesoft community edition 4.0.2.0 with tif images (tested by ephesoft) the problem that ephesoft can classify or extract data from certain images but from others he can't with no error message in files log, i dont now why. When i click on…
salah eddine
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Error tesseract qt

I have a strange error. I want to build a simple example. .pro file: ... LIBS += ... -llept LIBS += ... -ltesseract main.cpp: char *outText; tesseract::TessBaseAPI *api = new tesseract::TessBaseAPI(); // Initialize tesseract-ocr with English,…
Gleb Belyaev
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How to detect simple text with Tesseract ORC?

I'm trying to convert simple image with numbers to text using https://github.com/tesseract-ocr/tesseract. I compiled latest version from github with Leptonica and other libs required for image process. My image looks like this: I'm trying to…
user1564141
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1 BIT MORPHOLOGY Leptonica

I am trying to understand the Leptonica code to perform 1 BIT Morphology(dilation and erosion) . Can anyone please elaborate below points. Dilation can be implemented as follows: start with a cleared destination image (all OFF pixels). Then do a…
Kumar Vishal
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Processing dark text images for tesseract ocr

I have noticed that whenever I use dark background images for tesseract I am getting a segmentation fault. I was trying to extract symbols using this code #include #include #include #include…
iLoveCamelCase
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Computer Vision: Document analysis & Text detection methods (OCR)

I'm looking for technique to detect text on document. For example on plain .txt file it's easy: There are many libraries, API's & SDK's for image processing and usually they have methods implementing OCR's algorithms. But discussing "complex"…
michael
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Tesseract-ocr, baseapi.h fatal error: platform.h file not found

I am working on engineering work on license plate recognition and therefore started from a simple code. Namely, I downloaded all the libraries or OpenCV, Tesseract and Leptonica but when you try to compile I have a problem with the file baseapi.h…
user4406224
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Building tesseract without leptonica

I need to build tesseract without leptonica dependency for some work(to porting using emscripten). I looked into the make files and it seems tesseract requires leptonica header files and lib files in order to build. Providing header files is not an…
HarshaXsoad
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An invalid parameter error at msvcr120.dll (Building Tesseract Lib in 64bit Windows)

I have already raised the inquiry to Tesseract Forum, but whether I can have a clue for the error, I raise the issue at this forum again. As this is my favorite forum in solving the problems. I have a problem somehow related to the tesseract…
batuman
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Tesseract OCR integration to Visual Studio 2013

There is a question same issue here. But the solution is not there. I use windows8, visual studio 2013. My machine is 64bit. I try to integrate tesseract ocr to vs2013. I install leptonica from here and tesseract from here. I did below steps…
zakjma
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Tesseract not able to recognize characters even for a high quality Image

I am doing the process of cleaning up and image using leptonica and then passing it to tesseract for OCR.However it is not able to recognize the characters even though the image is of high quality.The image specifications are as follows. 1 bpp,…
nnm
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Text region extraction by finding co-ordinates of text from an image

I am developing an image processing software that extracts/crops and enhances this cropped single page form from an image taken from a cellphone camera.The form has no rectangular boundaries to simplify the process of extraction.Yes it is a white…
nnm
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BadImageFormatException or System.DllNotFoundException When trying to run a c# project

I have built a cpp dll with output configuration manager settings as shown in the snapshot . It builds successfully and dll gets created.Then to consume it I have written a c# project that includes the dll as follows…
nnm
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"Cannot find -I" error during runtime

Machine details : 64bit windows MinGW installed gcc version 4.8.1 make version 3.8.1 eclipse indigo CDT I am trying to run a simple code using the image processing library leptonica.The code just reads an image and writes the image to a file. int…
nnm
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unrecognized external symbol getImageLibVersions

I have followed this link to get started with executing leptonica programs.However I am getting the following output when I run either of the cl commands given on the page. Microsoft (R) C/C++ Optimizing Compiler Version 16.00.30319.01 for…
nnm
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