tesseract

java语言下利用tess4j开源库进行图片中的文本提取

由 大城市里の小女人 提交于 2020-02-26 05:06:15
后来发现了一个帖子：# Java OCR tesseract 图像智能字符识别技术 Java代码实现 一，tess4j 简单介绍 Tess4J是对tesseract -OCR API.的Java JNA 封装，使java能够通过调用Tess4J的API来使用tesseract -OCR 我有一篇博客也介绍了tesseract -OCR如何使用tesseract -OCR进行图片识别 java代码实现DOS命令使用tesseract -OCR开源引擎实现图片文字识别 二，tess4j环境准备 官网下载tess4j的jar包 https://sourceforge.net/projects/tess4j 解压之后目录结构如下，tess4j的iar包在dist目录里面 如果要进行中文字符识别，需要下载中文字库，可自行百度，我也提供了百度网盘链接 https://pan.baidu.com/s/1dmpqQ8Cm7Cd5zaLC0ZOZaw 三，Eclipse IDE下的代码实现 新建一个java项目 2.导入tess4j的dist文件夹下的tess4j jar包和lib文件夹下的全部jar包，注意，lib下有一个后缀为.properties的文件别导进去了，把那个删除掉就行，你或许会问会用到那么多jar包吗，因为jar包可能依赖于其他iar包，所以最好全导入进去，我遇到过一个错误

结合Tesseract完成图形验证码识别

由 旧巷老猫 提交于 2020-02-25 15:53:39
结合Tesseract完成图形验证码识别 Tesseract Tesseract是目前最准确的OCR（Optical Character Recognition）库.具有很高的灵活性，它可以通过训练识别任何字体。 安装 windows: https://github.com/tesseract-ocr/tesseract 设置环境变量 安装完成后，如果想要在命令行中使用Tesseract，那么应该设置环境变量。Mac和Linux在安装的时候就默认已经设置好了，在Windows下把tesseract.exe所在的路径添加到Path环境变量中 还有一个环境变量需要设置的是，要把训练的数据文件路径也放到环境变量中。 在环境变量中，添加一个TESSDATA_PREFIX= 这个路径value值跟这样设置即可 在命令行中使用tesseract识别图像 使用命令：tesseract 图像路径 文件路径 示例： tesseract a . png a 那么就会识别出a.png中的图片，并且把文字写入到a.txt中。如果不想要写入文件直接显示在终端，那么不要加文件名就可以了。 在代码中使用tesseract识别图像 （1）安装 pip3 install pytesseract - - default - timeout = 1000 同时读取图片，需要借助一个第三方库叫做Pillow (2)

How improve image quality to extract text from image using Tesseract

由 前提是你 提交于 2020-02-25 06:37:45
问题 I'm trying to use Tessract in the code below to extract the two lines of the image. I tryied to improve the image quality but even though it didn't work. Can anyone help me? from PIL import Image, ImageEnhance, ImageFilter import pytesseract img = Image.open(r'C:\ocr\test00.jpg') new_size = tuple(4*x for x in img.size) img = img.resize(new_size, Image.ANTIALIAS) img.save(r'C:\\test02.jpg', 'JPEG') print( pytesseract.image_to_string( img ) ) 回答1: Given the comment by @barny I don't know if

How improve image quality to extract text from image using Tesseract

由 天大地大妈咪最大 提交于 2020-02-25 06:37:16
问题 I'm trying to use Tessract in the code below to extract the two lines of the image. I tryied to improve the image quality but even though it didn't work. Can anyone help me? from PIL import Image, ImageEnhance, ImageFilter import pytesseract img = Image.open(r'C:\ocr\test00.jpg') new_size = tuple(4*x for x in img.size) img = img.resize(new_size, Image.ANTIALIAS) img.save(r'C:\\test02.jpg', 'JPEG') print( pytesseract.image_to_string( img ) ) 回答1: Given the comment by @barny I don't know if

基于python的OCR中文字符识别——基于windows平台

由 北城余情 提交于 2020-02-24 15:47:53
1.安装配套环境 （1）首先安装OCR字符识别库Tesseract 下载网址：https://digi.bib.uni-mannheim.de/tesseract/ 下载下图对应的版本 下载后双击进行安装，这里因为我们要识别中文字符，所以在安装界面中需要进行额外的语言勾选，展开Additional language data 然后点击next安装即可（注意：在选择安装路径的时候不要出现中文，并且要记住这个安装路径） 接下来配置环境变量.路径添加到环境变量中 分别对用户变量PATH和系统变量Path添加刚才的安装目录 D:\toolplace\OCR\Tesseract-OCR; 这里注意各个变量之间隔开用英文的分号。 环境变量修改好之后验证下是否安装成功。打开cmd命令行工具 敲入命令： Tesseract -v 安装python环境 pip install Pillow==5.2.0 pip install pytesseract==0.2.4 pathSaveShot = “” img = Image.open(pathSaveShot) text = pytesseract.image_to_string(img, lang='chi_sim') logging.info('[截取图片的识别结果:' + text + ']') 问题： 安装之后报错 pytesseract

PHP TesseractOCR exec command issue

由 北战南征 提交于 2020-02-07 06:58:27
问题 I have installed TesseractOCR from terminal of mac. when i run the following command from terminal it is working. tesseract "hello.png" /Applications/MAMP/tmp/php/987051047 but the same command is not working in exec("tesseract "hello.png" /Applications/MAMP/tmp/php/987051047") and the full code is $tesseract = new TesseractOCR("hello.png"); $tmp_dir = ini_get('upload_tmp_dir') ? ini_get('upload_tmp_dir') : sys_get_temp_dir(); $tesseract->setTempDir( $tmp_dir ); $test = $tesseract->recognize(

PHP TesseractOCR exec command issue

由 你说的曾经没有我的故事 提交于 2020-02-07 06:57:26
问题 I have installed TesseractOCR from terminal of mac. when i run the following command from terminal it is working. tesseract "hello.png" /Applications/MAMP/tmp/php/987051047 but the same command is not working in exec("tesseract "hello.png" /Applications/MAMP/tmp/php/987051047") and the full code is $tesseract = new TesseractOCR("hello.png"); $tmp_dir = ini_get('upload_tmp_dir') ? ini_get('upload_tmp_dir') : sys_get_temp_dir(); $tesseract->setTempDir( $tmp_dir ); $test = $tesseract->recognize(

How to tune tesseract for identifying number plate of a car more accurately?

由 旧时模样 提交于 2020-02-06 09:34:11
问题 I have a code to detect and identify the car number plate and convert the image into text using tesseract. I am using openCV to localise the number plate. The problem that I am facing is that tesseract is not accurately identifying the number. Is there any way I can improve the tesseract performance? My code (which I downloaded from Internet) is: import numpy as np import cv2 # from copy import deepcopy from PIL import Image import pytesseract as tess # plate = 0 def preprocess(img): # print

How to tune tesseract for identifying number plate of a car more accurately?

由 放肆的年华 提交于 2020-02-06 09:30:46
问题 I have a code to detect and identify the car number plate and convert the image into text using tesseract. I am using openCV to localise the number plate. The problem that I am facing is that tesseract is not accurately identifying the number. Is there any way I can improve the tesseract performance? My code (which I downloaded from Internet) is: import numpy as np import cv2 # from copy import deepcopy from PIL import Image import pytesseract as tess # plate = 0 def preprocess(img): # print

Tess4j - Pdf to Tiff to tesseract - “Warning: Invalid resolution 0 dpi. Using 70 instead.”

由 梦想与她 提交于 2020-02-06 07:25:51
问题 I am usig tess4j (net.sourceforge.tess4j:tess4j:4.4.0) and try OCR on pdf files. So as I understood I have to transform the pdf first to tiff or png (any of those suggested?) what I did like this: tesseract.doOCR(PdfUtilities.convertPdf2Tiff(inputPdfFile)); and get following warning: Warning: Invalid resolution 0 dpi. Using 70 instead. Question Does it has any influence on my scan results? (if not, ok - I can switch off the warning) Is there a way to set the DPI by hand or should convertPdf
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