tesseract

Detect white characters on black background using Tesseract

由 徘徊边缘 提交于 2019-12-17 16:18:14
问题 I'm completely new to Tesseract OCR. This problem might be simple but I can't seem to find the answer using Google. Basically, I have an image that contains two parts: the first part, which is at the top of the image, has a black background with texts in white color; the second part, which is at the bottom of the image, has white background with texts in black color. I ran tesseract on the image, which correctly recognized all characters in the bottom part, but none in the top part. I am sure

How to implement Tesseract to run with project in Visual Studio 2010

由 萝らか妹 提交于 2019-12-17 15:51:56
问题 I have a C++ project in Visual Studio 2010 and wish to use OCR. I came across many "tutorials" for Tesseract but sadly, all I got was a headache and wasted time. In my project I have an image stored as a Mat . One solution to my problem is to save this Mat as an image (image.jpg for example) and then call Tesseract executable file like this: system("tesseract.exe image.jpg out"); Which gets me an output out.txt and then I call infile.open ("out.txt"); to read the output from Tesseract. It is

OCR with the Tesseract interface

由 余生颓废 提交于 2019-12-17 06:27:21
问题 How do you OCR an tiff file using Tesseract's interface in c#? Currently I only know how to do it using the executable. 回答1: The source code seemed to be geared for an executable, you might need to rewire stuffs a bit so it would build as a DLL instead. I don't have much experience with Visual C++ but I think it shouldn't be too hard with some research. My guess is that someone might have had made a library version already, you should try Google. Once you have tesseract-ocr code in a DLL file

Pytesseract OCR multiple config options

由 寵の児 提交于 2019-12-17 03:06:31
问题 I am having some problems with pytesseract. I need to configure Tesseract to that it is configured to accept single digits while also only being able to accept numbers as the number zero is often confused with an 'O'. Like this: target = pytesseract.image_to_string(im,config='-psm 7',config='outputbase digits') Many thanks, Niall 回答1: tesseract-4.0.0a supports below psm . If you want to have single character recognition, set psm = 10 . And if your text consists of numbers only, you can set

Linux下 (Ubuntu16.04 ) Tesseract4.0训练字库，提高正确识别率Linux下(合并字库)

由 这一生的挚爱 提交于 2019-12-16 13:54:11
由于tesseract的中文语言包“chi_sim”对中文手写字体或者环境比较复杂的图片，识别正确率不高，因此需要针对特定情况用自己的样本进行训练，提高识别率，通过训练，也可以形成自己的语言库。 Linux和windows的系统方法一样,就是下面改名的地方,linux用的mv 命令,windows要用rename命令 , linux下要先安装 tesseract-ocr sudo apt install tesseract-ocr 步骤： 1、工具准备： （1）官方文档： https://github.com/tesseract-ocr/tesseract/wiki/TrainingTesseract-4.00 （2）Java虚拟机，由于jTessBoxEditor的运行依赖Java运行时环境，所以需要安装Java虚拟机。 下载地址： http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html （3）jTessBoxEditor2.0工具，用于调整图片上文字的内容和位置， 下载地址： https://sourceforge.net/projects/vietocr/files/jTessBoxEditor/ 安装包解压后运行的“jTessBoxEditor.jar”，

Symbol lookup error while using Tesseract

由 北战南征 提交于 2019-12-14 04:16:46
问题 I've been using Tesseract 4, for a project for more than two months now. (This means that it's running on input images for more than two months.) The problem that I'm shown is: multiprocess.pool.RemoteTraceback: """ Traceback (most recent call last): File "/home/cse/.local/lib/python3.5/site-packages/multiprocess/pool.py", line 119, in worker result = (True, func(*args, **kwds)) File "/home/cse/.local/lib/python3.5/site-packages/multiprocess/pool.py", line 44, in mapstar return list(map(*args

php exec tesseract outputs empty array

由 此生再无相见时 提交于 2019-12-14 02:15:50
问题 I installed tesseract v3.01 on windows 7. I added tesseract path to the environments variables. I obtains the right output after typing this command in the cmd windows: "tesseract test.tif test". When I try to get the same result in php using the folowing script, I get an empty array and no file is generated: <?php try { exec("tesseract.exe test.tif test", $msg); var_export($msg); } catch (Exception $e) { echo $e; } ?> Any clue ? thanks in advance ! 回答1: <?php try { $msg = array(); // TRY

Tesseract: Advantage to Multi-Page Training File vs. Multiple Separate Files?

由 夙愿已清 提交于 2019-12-13 21:26:16
问题 This SO answer suggests that training tesseract with .tif files has an advantage over .png files because the .tif files can have multiple pages and thus a larger training sample. Yet, this SO question discusses procedures for training with multiple images at once. More so, the man page for, e.g. mftraining suggests that it can accept multiple training files. Is there any reason then not to train with multiple separate image files? 回答1: It appears that using multiple images to train tesseract

Combine two commands using GNU parallel for OCR project

由 佐手、 提交于 2019-12-13 18:13:10
问题 I would like to write a script which runs a command to OCR pdfs, which deletes the resulting images, after the text files has been written. The two commands I want to combine are the following. This command create folders, extract pgm from each PDF and adds them into each folder: time find . -name \*.pdf | parallel -j 4 --progress 'mkdir -p {.} && gs -dQUIET -dINTERPOLATE -dSAFER -dBATCH -dNOPAUSE -dPDFSETTINGS=/screen -dNumRenderingThreads=4 -sDEVICE=pgmraw -r300 -dTextAlphaBits=4

NoSuchFieldError: RESOURCE_PREFIX with a maven project using tess4j

由 北战南征 提交于 2019-12-13 16:30:16
问题 tess4j is an OCR packed with native library, I made a maven project to test it, I did add the installation path of maven to eclipse. I added M2_HOME, MAVEN_HOME and JAVA_HOME env variable, here is my parent pom <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>fr.mssb.ongoing</groupId> <artifactId
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