tesseract

cmake and tesseract, how to link using cmake

由 空扰寡人 提交于 2021-02-19 06:00:11
问题 I'm trying to build my application against tesseract, which i have installed through brew (working on mac os x). While i can compile my application without problem using g++ and pkg-config, i'm not sure how to do the same with cmake. I tried FIND_PACKAGE tesseract REQUIRED but it can't seem to find it. Does anyone have a sample CMakeLists.txt ? Appreciate the help. 回答1: It seems the only (or the easiest) way to use tesseract in your project with CMake is to download tesseract sources (from

Pytesseract - Using user patterns

由 ╄→гoц情女王★ 提交于 2021-02-19 04:18:55
问题 I'm trying to use tesseract's user-patterns with pytesseract but can't seem to get the command working. This seems like it should be fairly straight forward but the documentation is sparse I'm on tesseract 3.05.01. Doing this doesn't work: pytesseract.image_to_string(image, config='--oem 0 bazaar --user-patterns ./timestamps.user_patterns') I have a bazaar file in /usr/local/share/tessdata/configs/bazaar that says this: load_system_dawg T load_freq_dawg T user_words_suffix user-words user

How to OCR image with Tesseract

由 浪子不回头ぞ 提交于 2021-02-19 03:33:12
问题 I am starting to learn OpenCV and Tesseract, and have trouble with what seems to be a very simple example. Here is an image that I am trying to OCR, that reads "171 m": I do some preprocessing. Since blue is the dominant color of the text, I extract the blue channel and apply simple thresholding. img = cv2.imread('171_m.png')[y, x, 0] _, thresh = cv2.threshold(img, 150, 255, cv2.THRESH_BINARY_INV) The resulting image looks like this: Then throw that into Tesseract, with psm 7 for single line:

java tesseract error in linux “Unable to load library 'tesseract': libtesseract.so”

由 青春壹個敷衍的年華 提交于 2021-02-18 17:49:55
问题 I am using tess4J ocr library in eclipse and is working fine in my windows. But when i want to run that java program in linux it is giving an error "Unable to load library 'tesseract': libtesseract.so: cannot open shared object file: No such file or directory". I dont have any permissions on linux to install the tesseract or any other software . Just i can use the jar files and run the java program by calling the shell script.Please help me on this . As I am thinking my problem will be solved

Tesseract - ERROR net.sourceforge.tess4j.Tesseract - null

由 丶灬走出姿态 提交于 2021-02-18 10:23:08
问题 Created a java application that uses Tesseract in order to convert a given image or pdf to a string format, when running it on my machine as a unit test using junit it runs great but when running the full system which is a restFul API run by tomcat that receives the image and runs Tesseract it gives me the following error: 23:22:36.511 [http-nio-9999-exec-3] ERROR net.sourceforge.tess4j.Tesseract - null java.lang.NullPointerException: null at net.sourceforge.tess4j.util.PdfUtilities

Does Google Cloud Vision API detect formatting in OCRed text like bold, italics, font name (helvetica or times new roman), etc?

由 我们两清 提交于 2021-02-17 05:35:31
问题 The quick brown fox jumps over the lazy dog In such a case like this, assuming there are different font families too, can cloud VIsion API detect this. Or any other OCR API detect this cleanly. Tesseract has capabilities but its so inaccurate. 回答1: ABBYY Cloud OCR will be quite accurate, but at the end, everything depends on your fonts and scanning quality. 回答2: Does google cloud vision API detect formatting in OCRed text like bold, italics, font name (helvetica or times new roman), etc?

图像识别

由 自闭症网瘾萝莉.ら 提交于 2021-02-15 16:54:11
1、Tess4j 最近在GitHub上看到一个图像识别的开源框架 tess4j ，而且是Java版的，为此利用此框架来识别验证码中的信息，利用它提供的字体库，来提取信息，对于没有什么干扰线的验证码准确率还是蛮高的，对于有一些干扰线的就差一些，不过也可以能通过训练字体库，从而可以提高准确率的。 根据范例，写了一个简单的提取验证码信息的工具类VerificationCode： 主要是用这个类的extract方法，这个方法有3个参数： 第1个参数是指定图片的路径 第2个参数是指定字体库的，其中chi_sim表示中文简体，eng表示英文 第3个参数是指定是否需要去除干扰线，true表示需要，false表示不需要 package com.swnote.tess4j.test; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; import com.recognition.software.jdeskew.ImageDeskew; import net.sourceforge.tess4j.ITesseract; import net.sourceforge.tess4j.Tesseract; import net.sourceforge.tess4j.util

Tesseract Ocr文字识别

由 a 夏天 提交于 2021-02-14 15:25:44
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。2005年，Tesseract由美国内华达州信息技术研究所获得，并求诸于Google对Tesseract进行改进、消除Bug、优化工作。Tesseract目前已作为开源项目发布在Google Project. 运行环境： windows10 + python 3.6 + tesseract 4.0.0-beta.1 先看效果： 一、安装python模块 pip3 install pytesseract 二、安装tesseract orc 下载地址： https://github.com/UB-Mannheim/tesseract/wiki 点击“tesseract-ocr-w64-setup-v4.0.0-beta.1.20180414.exe”下载安装。 注意：安装的时候选中中文包。 本人安装目录：C:\Users\Administrator\AppData\Local\Tesseract-OCR 使用命令，查看版本号和支持语言： cd C:\Users\Administrator\AppData\Local\Tesseract-OCR tesseract -v tesseract --list-langs　　#查看Tesseract-OCR支持语言 三

Tesseract-OCR文字识别

由 谁说我不能喝 提交于 2021-02-14 14:13:46
放在前面 ：本文主要参考了这篇 知乎专栏-Gemfield 时间有限，长话短说，主要是放一些资源，方便查找。 1.预处理 对于中文识别来说，不做预处理简直惨不忍睹。主要手段为 binarize and de-noise image； 高斯模糊之类的blur算法； 缩放图像（fix text size，e.g. 12 pt should be ok)； 锐化（Sharpening effect）； fix DPI (if needed) 300 DPI is minimum； try to fix illumination of image (e.g. no dark part of image); contrast, brightness... it tends to work best when there is just black & white, i.e. no greyscale; 去掉图片中无关的线条; 高对比度； 详细的 官方教程 再放一个有人制作的相关工具 textcleaner ， 这里 有一小段介绍 2. 识别中文 下载中文语言包，简体中文的代号为chi_sim，每种语言在新时代的tesseract都应该有3种语言包：fast版、best版、raw版。fast版是考量了速度，并对准确度做了一定的妥协，apt安装的时候下载的语言包模型正是fast版

cMakefile for using tesseract and opencv

由 别等时光非礼了梦想. 提交于 2021-02-11 14:28:12
问题 I am a newbie to cmake and I am writing an application for using tesseract. the g++ command line work fine g++ -O3 -std=c++11 `pkg-config --cflags --libs tesseract opencv` my_first.cpp -o my_first But I wrote the following CMakeFile.txt and building in Clion and it throws a bunch of linking errors cmake_minimum_required(VERSION 2.6) add_compile_options(-std=c++11) project (my_first) find_package(PkgConfig REQUIRED) pkg_check_modules (OPENCV REQUIRED opencv) link_directories(${OPENCV_LIBRARY
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