tesseract

Java exception- Exception in thread “main” java.lang.NoClassDefFoundError: net/sourceforge/tess4 j/Tesseract

拟墨画扇 提交于 2019-12-05 20:49:33
I am try to make things works with tess4j (OCR algorithm), and i m using this code: import java.awt.image.RenderedImage; import java.io.File; import java.net.URL; import javax.imageio.ImageIO; import net.sourceforge.tess4j.*; public static void main(String[] args) throws Exception{ URL imageURL = new URL("http://s4.postimg.org/e75hcme9p/IMG_20130507_190237.jpg"); RenderedImage img = ImageIO.read(imageURL); File outputfile = new File("saved.png"); ImageIO.write(img, "png", outputfile); try { Tesseract instance = Tesseract.getInstance(); // JNA Interface Mapping // Tesseract1 instance = new

java.lang.UnsatisfiedLinkError: Couldn't load stlport_shared: findLibrary returned null (tess-two)

半城伤御伤魂 提交于 2019-12-05 20:10:19
问题 I am using sqlcipher.jar for encrypting database in android and also using it's native library in libs/armeabi folder 1)libdatabase_sqlcipher.so 2)libsqlcipher_android.so 3)libstlport_shared.so and libs/x86 folder 1)libdatabase_sqlcipher.so 2)libsqlcipher_android.so 3)libstlport_shared.so and jar file named sqlcipher.jar in libs/ folder all i have imported now every thing is working fine it's going good database is fetching and reading from sqlite is also working fine and also i am not

在centos7上编译Tesseract 4.1和Leptonica 1.78

喜欢而已 提交于 2019-12-05 19:38:47
Tesseract 4.0 源码编译安装时,会需要 Leptonica 依赖。在安装好最新版本后,编译 Tesseract 时依然会有报错: configure: error: Leptonica 1.74 or higher is required. Try to install libleptonica-dev package. 这种情况出现,可以查看一下本机 Leptonica 头文件和库的位置,以及pkg-config的配置,并添加到环境变量中。 编译Leptonica没有任何难度,直接一次就过了。安装完后,Leptonica会安装在如下目录: Leptonica 头文件在 /usr/local/include/ 路径下 leptonica 文件夹中,该文件夹下有很多 .h 结尾的文件。 Leptonica 库在 /usr/local/lib 路径下, 以liblept开头。 然后执行如下命令: export LD_LIBRARY_PATH=/usr/local/lib export LIBLEPT_HEADERSDIR=/usr/local/include export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig 最后,回到 tesseract 源码文件夹下 ./autogen.sh ./configure --with-extra

基于Tesseract的OCR图像识别

妖精的绣舞 提交于 2019-12-05 17:19:17
何为Tesseract? Tesseract的OCR引擎最先由HP实验室于1985年开始研发,至1995年时已经成为OCR业内最准确的三款识别引擎之一。然而,HP不久便决定放弃OCR业务,Tesseract也从此尘封。数年以后,HP意识到,与其将Tesseract束之高阁,不如贡献给开源软件业,让其重焕新生。在2005年,Tesseract由美国内华达州信息技术研究所获得,并委托Google对其进行改进、优化工作。 Tesseract目前已作为开源项目发布在Google Project,它与Leptonica图片处理库结合,可以读取各种格式的图像并将它们转化成超过60种语言的文本,我们还可以不断训练自己的库,使图像转换文本的能力不断增强。如果团队深度需要,还可以以它为模板,开发出符合自身需求的OCR引擎。 Tesseract基本工作原理: Tesseract安装教程: 1. tesseract下载地址:https://digi.bib.uni-mannheim.de/tesseract/ 2.下载完成后双击安装包,选择路径,选择语言后继续下一步直到安装成功 3.配置Tesseract的环境变量 4.查看安装结果 在cmd中输入tesseract –v 有结果如下图,则说明安装成功: Tesseract使用教程: bat调用Tesseract在cmd中进入图片所在目录,输入

Improve horizontal line detection in .pdf image with OpenCV

[亡魂溺海] 提交于 2019-12-05 16:27:05
I have .pdf files that have been converted to .jpg images for this project. My goal is to identify the blanks (e.g ____________) that you would generally find in a .pdf form that indicate a space for the user to sign of fill out some kind of information. I have been using edge detection with the cv2.Canny() and cv2.HoughlinesP() functions. This works fairly well, but there are quite a few false positives that come about from seemingly nowhere. When I look at the 'edges' file it shows a bunch of noise around the other words. I'm uncertain where this noise comes from. Should I continue to tweak

JAVA Tess4j doOCR() not working, Exception “Invalid memory access”

拟墨画扇 提交于 2019-12-05 16:03:53
I'm working in dynamic web project in eclipse, I made a TesseractOCR class that contain: public class TesseractOCR { public TesseractOCR() { } public String doOCR(String file) { System.setProperty("jna.library.path", "32".equals(System.getProperty("sun.arch.data.model")) ? "lib/win32-x86" : "lib/win32-x86-64"); File imageFile = new File("C:\\Users\\Sherein Dabbah\\Downloads\\ca096-d7a6d799d7a1d798d799d7a72.jpg"); Tesseract instance = Tesseract.getInstance(); // JNA Interface Mapping Tesseract1 instance1 = new Tesseract1(); instance.setLanguage("heb+eng"); // Tesseract1 instance = new

opencv4nodejs 在 mac 上的安装

放肆的年华 提交于 2019-12-05 14:47:20
一直报错 RPC, 通过以下办法解决的: brew install git //更新git版本 git config --global http.postBuffer 524288000 //增大git缓存 brew unlink tesseract // 如果没有tesseract可以忽略这个命令 然后执行 npm -g install opencv4nodejs ,要等很长时间才能安装成功。 安装成功后,brew link tesseract 来源: https://www.cnblogs.com/mlllily/p/11928990.html

Ubuntu16.04 安装tesseract

北城以北 提交于 2019-12-05 14:41:29
原文链接:https://blog.csdn.net/tintinetmilou/article/details/80212305 必要包安装: sudo apt-get install autoconf automake libtool autoconf-archive pkg-config libpng12-dev libjpeg8-dev libtiff5-dev zlib1g-dev -y 如果要用tesseract自己训练,就需要安装training,那下面这些依赖也要安装: sudo apt-get install libicu-dev libpango1.0-dev libcairo2-dev leptonica安装 sudo apt install git git clone https://github.com/DanBloomberg/leptonica cd leptonica autoreconf -vi ./autobuild ./configure make -j8 sudo make install 安装tesseract git clone --depth 1 https://github.com/tesseract-ocr/tesseract.git cd tesseract ./autogen.sh ./configure --enable

Crop pictures with Leptonica API -> OR which image processing Lib to use?

徘徊边缘 提交于 2019-12-05 14:02:57
I'm trying to do two things -> First I need to read in an image and crop it ( coordinates / frame will be provided by the user ). Then I want to run an OCR over it. ( Actually the cropping an the OCR shall be strictly divided ). Now to my problem: For the OCR I'm using Tesseract, which is using the Leptonica API for the image processing. Since I'm programing for an embedded device I want to keep the count of different libraries low. So my best interest is to crop my image with Leptonica, so I don't need a third library just to do this task. So my question is now, how can I cut out frames with

Java 使用 Tess4J 进行 图片文字识别 笔记

拟墨画扇 提交于 2019-12-05 13:24:40
最近的工作中需要使用到从图片中识别文字的操作,就在网上找到到Tess4j.那么,现在来总结一下使用中遇到的问题. 关于Tess4J简价: http://tess4j.sourceforge.net/ (需要翻墙) 很简洁的项目主页.一个从Java角度使用JNA封闭的针对 Tesseract ORC 的开源项目,使用 Apache License, v2.0 协议.支持TIFF, JPEG, GIF, PNG, and BMP image formats,Multi-page TIFF images,PDF document format.(支持Tiff是一个很大的亮点) 那就再了解一下 Tesseract ORC. https://code.google.com/p/tesseract-ocr/ 是一个Google支持的开源的OCR图文识别开源项目.去持多语言(当前3.02 版本支持包括英文,简体中文,繁体中文),支持Windows,Linux,Mac OSX 多平台.使用中Tesseract 的识别率非常高. ( 自己仅对数字,使用中图片清析的情况下没发生错误 ) 网上传的代码示例大多是在Windows下安装Tesseract ORC后通过CMD命令操作进行图识别操作.而 Tess4j 针对Tesseract 提供了JNI支持,同时还提供了一些图片操作的工具类,提供比如图片放大