I'm using Tess4J (JNA wrapper around tesseract), and trying to call tess.doOCR(myFile) to OCR text from a single-page PDF.
I have GhostScript installed (by using yum install ghostscript), gs -h works correctly.
My app server is using 64-bit JVM, and I have gsdll64.dll, and the 64-bit tesseract dll's liblept168.dll and libtesseract302.dll in the class path.
When tess.doOCR(myFile) is called, this is logged:
GPL Ghostscript 8.70 (2014-09-22)
Copyright (C) 2014 Artifex Software, Inc. All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.
Processing pages 1 through 1.
Page 1
But then it just stops there. The program doesn't go any further.
UPDATE --
It looks like the real issue is from this error:
java.lang.UnsatisfiedLinkError: Unable to load library 'tesseract': Native library (linux-x86-64/libtesseract.so) not found in resource path
After looking around a lot, I don't see a convenient place to find this libtesseract.so file, and I'm not sure what it takes to get this onto my Linux app server. I read that maybe I need to download some C++ runtime, but I don't see a Linux download for that. Any advice would be much appreciated.
Or is this something to do with a symbolic link?
The Fix was simple for me,just do sudo apt-get install tesseract-ocr from the command line. For linux you dont need to worry about the DDL librarires or the jvm version. Installing tessearct from apt-get will do the trick.
Those DLLs are for Windows. For Linux, you'll need to install or build from Tesseract source.
That GS version, 8.70, is quite old. The latest Ghost4J library that Tess4J uses is not compatible with that.
Tess4J should include required libraries. However, you need to extract them first.
This should do the trick:
File tmpFolder = LoadLibs.extractTessResources("win32-x86-64"); // replace platform
System.setProperty("java.library.path", tmpFolder.getPath());
You should replace the argument of extractTessResources(..) with your platform. You can find possible options by looking into the Tess4J jar file.
This way you need not to install Tesseract on your system.
Recently I wrote a blog post about Tess4J in which I used this technique. Maybe it can help if you need further information or a running example project.
sudo apt-get update
sudo apt-get install tesseract-ocr
download test data by git
https://github.com/tesseract-ocr/tessdata
Related
I am trying to install a software package called kinsol, a non-linear equation solver, through ccmake as instructed in its documentation. The package requires a cmake version 3.12 or higher. So, I installed 3.17.3. Now, the problem is that my kinsol installation process is not able to locate ccmake and hence gives the message "ccmake ../kinsol-6.2.0
The program 'ccmake' is currently not installed. You can install it by typing:
sudo apt install cmake-curses-gui". But using the aforementioned command installs the version 3.5, which again fails in the task due to the version requirement of kinsol. I had come across a similar question in this forum and so I followed the workarounds suggested there as in putting the installation path of cmake in the .bashrc file still without any success. Does anyone know how to make the path of cmake known to the software?
Thanks,
DP
I want to create an image from nvidia jetson tx2, in several places (like https://developer.ridgerun.com/wiki/index.php?title=Cloning_TX2) talk about flash.sh file to perform the task but I cannot found it, also I search using find / -iname flash.sh and nothing. Where can I find this file? Do I need install something eles?
Ubuntu 18.04.5 LTS, Jetpack 4.5.1
Download L4T Driver Package (BSP) driver from: https://developer.nvidia.com/embedded/linux-tegra and download, be sure to dowload the correct version for your JetPach, for 4.5.1 check this:
https://developer.nvidia.com/embedded/l4t/r32_release_v5.1/r32_release_v5.1/t186/tegra186_linux_r32.5.1_aarch64.tbz2
Try to download this
https://gist.github.com/Davidnet/013ceb704ebdc7ebd728e059f90fca80
Put it in your path.
Run
./flash.sh
I tried to install mono and monodevelop on centOS 6.3.
After many hours I was able to install mono but failed with monodevelop.
I'm really astonished how difficult and time consuming it is, to get a recent mono/monodevelop version on linux installed.
Is there nobody willing to write and maintain an install/compile tutorial to get the most recent mono/monodevelop/monodata/ASP.NET MVC/... version on the major linux distributions (Centos, Ubuntu, Suse, Debian) installed?
I think many people developing on Windows (with limited linux knowledge) would like to start using mono, if the boarding hurdle would be somehow lower.
It may be the most important to make Mono more used and more visible.
Please, write a tested tutorial (script) for compiling mono/monodevelop.
Thank you!
I have created a project on Open Build Service, which produces builds of the latest MonoDevelop 4.0.10 for Debian, Ubuntu, CentOS, and Fedora.
see https://build.opensuse.org/project/show/home:tpokorra:mono
For installation instructions with apt-get or yum, see:
http://software.opensuse.org/download/package?project=home:tpokorra:mono&package=monodevelop-opt
I hope this will increase the usage of MonoDevelop on Linux Desktop environments.
Monodevelop 4.
If you use any *buntu. Check this.
"You can open up the terminal and install it via the following:
1. sudo add-apt-repository ppa:keks9n/monodevelop-latest
2. sudo apt-get update
3. sudo apt-get install monodevelop-latest"
http://mono-d.alexanderbothe.com/?p=101
Xamarin should be doing a better job at publishing the linux packages in a one-click manner. I don't care what linux distro (SuSE, RHEL, CentOS, Ubuntu etc) - just pick any one as the supported one and publish for it. It seemed that it used to be SuSE but even that has old packages as seen within Zypper/YaST.
Update Mono framework
Having said that, to update the Mono framework itself, without letting go of the package managers try this. This will work as long as the project dutifully publishes the RPMs. You don't want to build from source since it's a more fickle process and the setup distracts from your real objective (i.e. develop).
Obviously, please replace the URL below to what will be latest by the time you're reading this.
mkdir mono-rpms
cd mono-rpms
wget --reject "index.html*" -nd -r -e robots=off --no-parent http://download.mono-project.com/archive/3.2.3/linux/x64/
sudo zypper install *rpm
Update MonoDevelop (the IDE)
Timotheus Pokorra's answer indicates he's filling in some of the usability void left by Xamarin (Thanks Timotheus!!). You can install MonoDevelop via
http://software.opensuse.org/download/package?project=home:tpokorra:mono&package=monodevelop-opt
Note that on SuSE I get the error
Problem: nothing provides liberation-mono-fonts needed by mono-libgdiplus-opt-3.0.12-7.1.x86_64
Solution 1: do not install monodevelop-opt-4.0.12-5.2.x86_64
Solution 2: break mono-libgdiplus-opt-3.0.12-7.1.x86_64 by ignoring some of its dependencies
I (very reluctantly) selected to break the dependency. Note that I already had liberation-fonts (via sudo zypper install liberation-fonts). I don't know if its the same/different as liberation-mono-fonts. Anyway, hope Timotheus fixes it when he has a moment.
I'm not sure if you've already seen this, but this may help:
http://www.mono-project.com/Parallel_Mono_Environments
The most common problem that new developers have when coming to Linux from systems like Windows is not properly setting up their environment variables and so when they do the standard ./configure && make && make install routine, when it involves a number of source packages (like Mono does), any package that depends on the core package won't pick up the correct location for that base package.
Your question really doesn't explain what parts you found confusing or difficult so it's hard to address those issues.
For people unfamiliar with setting up Linux systems, it may be easier if you just go with a system like Ubuntu which has fairly recent pre-built packages (although not the latest - I don't think any Linux system keeps up with Mono releases) rather than wrestling with the learning curve of how to build everything yourself.
It is confirmed that in the near future Xamarin will support Linux and provide binaries (mono and mainline applications) for Debian and Centos derivatives, and their are already packages for Debian and Centos derivatives for technical preview. So cheers and no more pain of compiling and even parallel mono installaions.It can not get more easy than this. Check here
I'm pretty new to rails and I'm trying to get an application working. It's currently using ffi and typhoeus which need a version of libcurl. How can I install a version of libcurl for Windows 7.
Thanks!
There's one option I implemented but couldn't install only libcurl packages. Cygwin provides lots of the packages and libraries used for development in Linux for being installed on Windows (included curl, libcurl, libcurl-dev, etc).
http://www.cygwin.com/
It worked for me in windows 7 64 bit OS.
Here's another solution for that specific gem
https://github.com/typhoeus/typhoeus/pull/151/files
Greetings.
Answer that worked for me was:
Download cURL from the following URL: https://curl.haxx.se/windows/ (I chose 64bit because that's the system I'm using)
Go into the archive and browse to /bin
Locate libcurl_x64.dll (it may be just libcurl.dll)
Extract to your local drive
Rename it to libcurl.dll if it has the _x64 suffix
Cut + paste the file into the /bin directory of your Ruby installatio
It should work after this
I've found some tools that can convert PDF to SWF, but I'm hoping to find something or even a library to be able to be able to incorporate this on the server to be able to store the SWF in a database.
Have you tried SWFTOOLS? On Debian/Unbuntu:
sudo apt-get install swftools
pdf2swf filename.pdf
http://wiki.swftools.org/index.php/Examples#pdf2swf
They have a Windows version, and the source so you can compile it on other Linux flavors.