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Questions tagged [tess4j]

Tess4J is a Java JNA wrapper for Tesseract OCR API.

Description

A Java JNA wrapper for Tesseract OCR API.
Tess4J is released and distributed under the Apache License, v2.0.

Releases Versions.

  • Version 1.3 (released : May 31, 2014)
  • Version 2.0 Beta (released : June 1, 2014)
  • Version 3.4.3 (released: 14 January 2018)

Features:

The library provides optical character recognition (OCR) support for:

  • TIFF, JPEG, GIF, PNG, and BMP image formats
  • Multi-page TIFF images
  • PDF document format

Related tags

Links

Tess4J homepage
Tess4J Github

222 questions
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tesseract is giving highly inconsistent result

I want get result of match which is in format of image . Below is the code I'm using to read text from image .I have used python code it also gives same result. How can i improve the output or is there any other better way for my problem . …
gaurav singh
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Tesseract / Tess4j memory leak

We are trying to use Tesseract with Tess4j for OCR text extraction. On continuous use of tesseract over a period, we notice the RAM used by the application getting increased gradually, During this time, The heap memory is still free. We monitored…
aravinth
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Java OCR Not reading clearly obvious numbers

picture of processed image + original I'm working on a project where I'm taking Smash Bros. game output, taking a screenshot, processing it in order to detect the percents which the characters are sitting at. The program I wrote is detecting the 57…
Frolic
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Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/jna/Pointer

I am trying to use tess4j into my java program. Here is my code: `import java.io.File; import net.sourceforge.tess4j.Tesseract; import net.sourceforge.tess4j.TesseractException; class Test { public static void main(String[] args) { …
Shobhit Tewari
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Why is tessdata throwing Exceptions?

All is happening on MAC in SpringBoot WAR file deployed in Tomcat: I have tesseract 4.1.0 installed (via brew on Mac). For Tessdata - OCR on Mac net.sourceforge.tess4j …
Morkus
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Tess4J, not finding tessdata

So I am working on this project and I need to use tess4J inorder to read some text on some images. Unfortunatly i can not seem to resolve the following error: Error opening data file C:\Users\****\eclipse workspace\****\tessdata\eng.traineddata…
mohammed mallah
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OCR not recognising text against a black background in Tess4j

I am not able to extract text against a black background as shown in the attached image. Everything else is getting recognised. Can somebody please help? public static void main(String args[]) { scrShotDirPath = new…
Prakash P
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How to whitelist characters in tess4j version 4.1.*

The objective is to read number specific data (1,2,...,9,0) from an image. For this, I'm using Tess4j version 4.1.1. …
pritamprasad
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How can I get simple Text from image?

I have a image captcha I already use Tess4j, but it cannot return perfect result. I want to get text from simple image captcha same a picture. Thanks for your help.
kien vu
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How to extract text from PDF image

I wanted to extract data from PDF which has image, and the image is form where letter will be inside small boxes for example, name : t e s t, here each and every word will be inside square box. I have tried tesseract OCR could not get the desired…
raghavendra prasad gudipalli
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How to set language in Tess4J using language from mobile device?

I am using a web service to read image files and return me some text on it using Tesseract. As we know Tesseract/Tess4j supports languages input in the ISO 639-3 format (ie: eng, spa, deu, ara, etc...) but the language I get from the mobile device…
Francisco Souza
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Android application and java application produces different results for same image

I am developing OCR application for two different platforms. Android Windows I am using android studio for android application development using Tess-two library version 5.4.1. Following is my code that I am using for text recognition from…
Nasir Rahim
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How do I make Tess4J accurately read TIFF image after threshold has been applied?

I am very new to Tess4J so my knowledge is somewhat limited. I am currently using Tess4j to do OCR on an image that has already had a threshold applied to it using OpenCV. I'm using OTSU to threshold the image, and cropping out most noise, but…
Chino Ugwumadu
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Tess4j, Java : Tesseract causing JVM crash

I am working on integrating OCR functionality in our application. Currently whenever I run doOCr method, JVM crashes and entire application is stopped. I checked out and found this, but the answer is very unclear as it just tells to create bean, but…
We are Borg
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net.sourceforge.tess4j is throwing wrong results when reading data from image

I am trying to work with OCR (Optical Character Reorganization). I have a sample image and i want to read data out of it. Below is my sample image file. I have used tess4j API to read the text from image. Please find the below piece of code. public…
Manindar
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