A friend and I are interested in training the tesseract-OCR engine for a CV project. We tried using some wrappers such as PyTesser and pyocr, but the results are currently not as accurate as we need them to be. As such, we want to try training the tesseract to perform better for our purposes (i.e. identifying text on food labels), but are having some trouble installing the training tools.
What we've tried:
Looking on the google code website, the 'Compiling' page on the tesseract's google code wiki says the training tools are only available on version 3.03. However, the google code 'Downloads' page for tesseract-ocr only has the materials for 3.02. The bottom of the 'Compiling' page also has some comments about installing version 3.03 on Windows and OSX, but no comments yet for Linux users.
There also appears to be some sort of 3.03 source package for Ubuntu but we're not sure how to access it on our computers and the 'Compiling' page says we need to run these commands:
make training
sudo make training-install
We've also found a google group thread about tesseract 3.03 but again it seems like these posts do not include advice for Linux users (unless we missed something during the initial read).
Is this actually a really simple command-line install problem? Or, is there a way train tesseract with 3.02 (which we currently have installed)? Have we been looking at the wrong places for information?
Any advice or links to instructions for installing tesseract-ocr 3.03 for Linux distributions would be greatly appreciated! Thanks.
Tesseract can directly be installed in Ubuntu 14.04 using
sudo apt-get install tesseract-ocr
I don't have any idea if you can do it in older version of Ubuntu because the repo might be updated in later version of Ubuntu.
I had an aws ubuntu 14.04 instance.
when I tried installing Tesseract with
sudo apt-get install tesseract-ocr
It retuned package not found
But this worked for me.
sudo apt-get update
sudo apt-get install tesseract-ocr
Ubuntu is a debian based Linux distribution. The tesseract package you find will most likely be a debian package which will contain tesseract and the required default language files to allow you to run/train tesseract. You do NOT want the source package -- unless you just want to compile it yourself -- no need. You will not have to build tesseract, you just need to install the package. First, it appears you are new to Ubuntu, so please ready InstallingSoftware. It can be as easy as opening up an x-term and issuing the command apt-get install tesseract-pkgname (note: that means whatever the package name is).
There is no shortcut, take the time to understand whether you have a .deb package on your box that need to be installed or whether you are installing from a remote repository. The link above explains how to handle both.
Here is a specific Ubuntu thread dealing with installing tesseract Tesseract 3.0 + Ubuntu 10.04 Installation Guide Hope that helps. Tesseract is very good software.
I don't have any instructions for building Tesseract 3.03 for Linux specifically (I'm on Mac), but here's a link to download the source code for the 3.03 release candidate: https://tesseract-ocr.googlecode.com/archive/3.03-rc1.tar.gz
First run below command
sudo apt-get install tesseract-ocr
It will install tesseract version 3.04
Run below to update the tesseract
sudo apt-get --only-upgrade install tesseract-ocr
It will update tesseract to 4.1.3
Related
I was trying to install vs code on Chromebook with Linux but i get it off the website and go into the file and it says "apt is not install able" and things like it for about five rows of text I hope someone knows the answer.
Try beginning with sudo apt install as opposed to apt install. Linux can be wishy washy when it comes to installs in the terminal.
I am using Ubuntu 18.04
I built a mips cross-compiler using buildroot, but when I tried to test whether it would work,I got this message
/home/daisy/repos/repo/buildroot/output/host/bin/../libexec/gcc/mipsel-buildroot-linux-uclibc/9.3.0/cc1: error while loading shared libraries: libmpfr.so.6: cannot open shared object file: No such file or directory
I searched for solutions , one of which said this:
sudo pacman -S mpfr
Well , my Linux isn't archlinux, this didn't work for me.
somebody please tells me how to deal with it.
The above suggestions of installing libmpfr on your host system are wrong. Buildroot is supposed to have build libmpfr, it should be present in host/lib, and picked up by the cross-compiler by virtue of it having a proper RPATH. If it doesn't work, we need to figure out why, but the correct thing is not to install libmpfr on your host system.
In Ubuntu, apt command (Advanced Packaging Tool) is used for performing such functions as installation of new software packages, upgrade of existing software packages, updating of the package list index, and even upgrading the entire Ubuntu system.
Try this command :-
sudo apt-get update
sudo apt install libmpfr6
This will install shared libraries: libmpfr.so.6 to your Ubuntu system.
Hope It Helps !
I'm having a hard time trying to install Qt on linux. I downloaded the .run file on the website and installed Qt. However, when I try to compile the default Hello World project using Qtcreator, I get the following :
error cannot find -lGL
I was able to solve the problem by issuing the command :
sudo apt-get install libqt4-dev
But, I'm not satisfied with the solution as I want to use Qt5 and the name of the lib I downloaded implies version 4. Can someone explain what is going on and tell me if my solution is correct? If not, what should I do to get a working Qt on Linux.
Additional question
The correct answer, as provided by LtWorf, was to install libgl-dev. For future problems of this sort, can someone tell me how I should have guessed that I had to download this particular library? And why are there some libs with -dev at the end? What do they provide?
Well it is trying to link with libgl and doesn't find it. You should install libgl-dev.
-l is a linker option, it tells the linker to use a certain library.
For example you can have -lmagic meaning that you want to use libmagic.
Normally all libraries are called libsomething, and on debian you will find 3 packages called:
libsomething
libsomething-dbg
libsomething-dev
The 1st one is the library, the second one is the library compiled with the debug symbols, so you can make sense of stacktraces more easily, and the final one is the development package, it contains the .h files so you can link to the library.
sudo apt-get install libgl-dev
On Fedora 17, I did:
sudo yum install mesa-libGL-devel
Do you have libgl-dev installed? If not install it and it should work.
Those other posters are correct, but on some systems, the lib to install is named differently. I just dealt with a 32bit Ubuntu 14.04.5 LTS system, and libgl-dev was not available.
Instead, I needed to install the libgl1-mesa-dev package via:
sudo apt-get install libgl1-mesa-dev
I'm using CentOS 4.8 , i386.
I would appreciate if any one can help me to install Gnome (or any other GUI) while there is no yum available.
I tried to install yum but since It's a company's server with many things installed on it,
I faced with many problems.
However I decided to find a way to install Gnome without using yum
And please take note:
I'm a neophyte!
Did you try getting the source-code and building it manually?
You can get the code from
http://www.gnome.org/getting-gnome/
GNOME also provides a build tool to make the installation easier.
But, as it has already been pointed out - Servers are best managed over command line. It will give you more power and control over what you are doing.
I am trying to install emacs in offline computer.
but every time I try to build from the source and install it, it doesn't make it.
too complicated.
(terminal ./configure => error try with --without-makeinfo,
after a while, error try with --without-x,
after a while, error can't find emacs version...(and I also want to use X version))
so I want to download emacs binary file but I can't find for linux one.
where can I download pre-build binary emacs 23.3(lastest) for ubuntu?
I can download emacs 23.3 binary file for windows but not for ubuntu.
You could get the deb file directly from http://archive.ubuntu.com/ubuntu/pool/universe/e/emacs-snapshot/emacs-snapshot_20090909-1_amd64.deb and then try to install it using dpkg -i but there will probably be dependencies which you might miss. I'd suggest you try an apt-get install emacs-snapshot on your target machine. It will tell you all the packages it needs to fetch (along with URLs). Fetch all of them from a machine connected to the net and then dpkg -i those packages.
You can try the Ubuntu Emacs PPA here.
type in terminal
apt-get update
apt-get install emacs
for compile, are you download last version ? http://ftp.gnu.org/pub/gnu/emacs/
you can download deb file here
http://ir.archive.ubuntu.com/ubuntu/pool/main/e/emacs23/