I wrote my HelloWorld.cs using MonoDevelop, and Gtk# 2.0. It runs fine in the debugger, and it builds HelloWorld.exe. When I run from a terminal window "mono ./HelloWorld.exe" then the program runs as expected so I know it is coded as expected. However when I attempt to run it by double clicking on it from Files (Linux version of Windows Explorer) it opens Archive Manager with an error "An error occurred while loading the archive".
I am using Ubuntu 18.04.02 LTS, if that makes a difference.
I tried creating a link "ln -s ./HelloWorld.exe ./meow", and double clicked on meow, however that also opens Archive Manager with the same error.
I don't want my end product to require the user to open a Terminal window to run my program, what do I do so that the user can double click on my program from Files to run?
EDIT: [18FEB2019]
Thanks Some programmer dude, I like the bundle idea as I may port this project to a different flavor of linux and I hope this gives me a path to get there.
However, I got error:
Failure to load i18n assemblies, the following directories were searched for the assemblies:
Path: .
In Custom mode, you need to provide the directory to lookup assemblies from using -L
ERROR: Couldn't load one or more of the i18n assemblies: Failed to load I18N.dll
I searched and found
https://www.mono-project.com/docs/tools+libraries/tools/mkbundle/
I followed those directions and got stuck at this part
mkbundle -o CacheServer --cross mono-5.8.0-ubuntu-16.04-x64 CacheServer.exe --machine-config /etc/mono/4.5/machine.config
my error is
ERROR: Unable to load assembly `gtk-sharp' referenced by `/home/amccombs/Projects/HelloWorld/HelloWorld/bin/Debug/HelloWorld.exe'
I tried
mkbundle --fetch-target gtk-sharp
with result
Failure to download the specified runtime from https://download.mono-project.com/runtimes/raw/gtk-sharp
I then tried
sudo apt-get install gtk-sharp
with result
E: Unable to locate package gtk-sharp
Files is detecting the .exe extension as an archive, and therefore it opens it with File Roller or similar.
Just right-click the file HelloWorld.exe and select "Open With Other Application", click on "Find New Applications", and then type "mono" and press ENTER. The app will open.
Another possibility is to create a .desktopfile, and place it under ~/.local/share/applications, with this contents:
[Desktop Entry]
Exec=mono %F
MimeType=application/x-ms-dos-executable;
Name=mono
NoDisplay=true
Type=Application
MKBundle creates a native app from a mono application. The downside is that you have to compile both the app and all its dependencies, which can be tricky. In any case, the package you are looking for is gtk-sharp2.
An alternative to MKBundle is to include a text file, say HelloWorld.sh with the contents:
mono HelloWorld.exe
And then make it executable with:
chmod +x HelloWorld.sh
You can then pack both files together (use a .tar.gz target, which preserves attributes such as the executable one), and probably with a README file explaining to double-click HelloWorld.sh.
Or maybe you can pack the .exe with the .desktop file, and explain in the README file where it must be placed.
There are tons of possibilities.
From the documentation this driver looks great. I don't know how to install it so that I can use it though. I read somewhere that I should maybe use rebar? I looked at that documentation though and it appears to have the opposite problem. It says how to install it, but not how to use it.
Update
So it looks like after installing rebar, I can add the lines
{deps, [
{mysql, ".*", {git, "https://github.com/mysql-otp/mysql-otp",
{tag, "1.3.3"}}}
]}.
to my file rebar.config. I don't know what this does though. Do I have to compile or make this file now? Does rebar.config have to be in the same directory as my project? Right not the path to rebar.config is ~/rebar/rebar.config
Is it all correct to place my project so that it is a sibling to rebar in the file hierarchy?
Update
I ran ./rebar get-deps with the rebar folder and got
Pulling mysql from {git,"https://github.com/mysql-otp/mysql-otp",
{tag,"1.3.3"}}
Cloning into 'mysql'...
==> mysql (get-deps)
I still don't really know what this means though, and when I try compiling my erlang file I receive the result.
c(erlangFile.erl).
{error,non_existing}
rebar is a build tool for erlang.Please go through https://github.com/rebar/rebar/wiki/Rebar-commands for the commands.
After getting dependency, "rebar compile" is required to compile it.
For using the beam files, you have to give output beam path using Add Path to Erlang Search Path?
these methods.
Then you will be able to use it in your code.
Download your package, in this case
git clone https://github.com/mysql-otp/mysql-otp.git
Download a tool called rebar
git clone git://github.com/rebar/rebar.git
cd rebar
./bootstrap
Add the following to rebar/rebar.config
{deps, [
{mysql, ".*", {git, "https://github.com/mysql-otp/mysql-otp",
{tag, "1.3.3"}}}
]}.
Within the rebar/mysql-otp directory run
./rebar get-deps
Then within the same directory, run
./rebar compile
This will put a bunch of .beam files and .app file into the ebin/ directory
Next add the ebin/ directory to your path. You can update your $ERL_LIBS environment variable, run an include command within the erlang console like
1> code:add_pathz("~/rebar/mysql-otp/ebin").
or
1> code:add_pathz("rebar/mysql-otp/ebin")
And theres a few other ways to add it to your Erlang path.
Also, make sure mysql is also installed
Heres a few links with mysql installation instructions that worked for me
https://www.digitalocean.com/community/tutorials/how-to-install-mysql-on-centos-7
No package msyql-server available
I have a problem with running tesseract-ocr engine on linux. I've downloaded RUS language data and put it to tessdata directory (/usr/local/share/tessdata). When I'm trying to run tesseract with command tesseract blob.jpg out -l rus , it displays an error:
Error opening data file /usr/local/share/tessdata/eng.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
Failed loading language eng
Tesseract couldn't load any languages!
Could not initialize tesseract.
According to compiling guide, I used export TESSDATA_PREFIX='/usr/local/share/'
to point my tessdata directory.
Maybe I should edit any config files? Tesseract try to load 'eng' data files instead of 'rus'.
Screenshot:
http://i.stack.imgur.com/I0Guc.png
You can grab eng.traineddata Github:
wget https://github.com/tesseract-ocr/tessdata/raw/main/eng.traineddata
Check https://github.com/tesseract-ocr/tessdata for a full list of trained language data.
When you grab the file(s), move them to the /usr/local/share/tessdata folder. Warning: some Linux distributions (such as openSUSE and Ubuntu) may be expecting it in /usr/share/tessdata instead.
# If you got the data from Google, unzip it first!
gunzip eng.traineddata.gz
# Move the data
sudo mv -v eng.traineddata /usr/local/share/tessdata/
The simpliest way is to install the needed package:
sudo apt-get install tesseract-ocr-eng #for english
sudo apt-get install tesseract-ocr-tam #for tamil
sudo apt-get install tesseract-ocr-deu #for deutsch (German)
As you can notice, it opens the road to others languages (i.e. tesseract-ocr-fra).
I had this error too on the Windows machine.
My solution.
1) Download your language files from
https://github.com/tesseract-ocr/tessdata/tree/3.04.00
For example, for eng, I downloaded all files with eng prefix.
2) Put them into tessdata directory inside of some folder. Add this folder into System Path variables as TESSDATA_PREFIX.
Result will be
System env var: TESSDATA_PREFIX=D:/Java/OCR
And OCR folder has tessdata with languages files.
This is a screenshot of the directory:
No previous solution worked for me.
I've installed both by apt-get and manually downloading the tessdata, moved around /usr and so on and no one worked even if i exported the variable thousand times.
Finally, on a last try before start to cry i've tried to pass the path directly to the instance of Tesseract().
In Python: tr = Tesseract("/usr/local/share/tesseract-ocr/") and now it works. To clarify, im using tesserwrap module.
For Windows Users:
In Environment Variables, add a new variable in system variable with name "TESSDATA_PREFIX" and value is "C:\Program Files (x86)\Tesseract-OCR\tessdata"
tesseract --tessdata-dir <tessdata-folder> <image-path> stdout --oem 2 -l <lng>
In my case, the mistakes that I've made or attempts that wasn't a success.
I cloned the github repo and copied files from there to
/usr/local/share/tessdata/
/usr/share/tesseract-ocr/tessdata/
/usr/share/tessdata/
Used TESSDATA_PREFIX with above paths
sudo apt-get install tesseract-ocr-eng
First 2 attempts did not worked because, the files from git clone did not worked for the reasons that I do not know. I am not sure why #3 attempt worked for me.
Finally,
I downloaded the eng.traindata file using wget
Copied it to some directory
Used --tessdata-dir with directory name
Take away for me is to learn the tool well & make use of it, rather than relying on package manager installation & directories
For me the problem was in how I downloaded the train data files. Make sure you get the raw link.
Initially I was using:
wget https://github.com/tesseract-ocr/tessdata_best/blob/master/eng.traineddata
When I changed it to:
wget https://github.com/tesseract-ocr/tessdata_best/raw/master/eng.traineddata
It worked
For Ubuntu just run the below command and the Environment variable error will disappear.
command:
export TESSDATA_PREFIX=Path_of_your_tessdata_folder
Command Example:
export TESSDATA_PREFIX=/home/amar/Desktop/OCR/tesseract-4.1.1/tessdata
This command will set the tessdata folder's path to the environment variable with name TESSDATA_PREFIX and the above error will be resolved.
You can call tesseract API function from C code:
#include <tesseract/baseapi.h>
#include <tesseract/ocrclass.h>; // ETEXT_DESC
using namespace tesseract;
class TessAPI : public TessBaseAPI {
public:
void PrintRects(int len);
};
...
TessAPI *api = new TessAPI();
int res = api->Init(NULL, "rus");
api->SetAccuracyVSpeed(AVS_MOST_ACCURATE);
api->SetImage(data, w0, h0, bpp, stride);
api->SetRectangle(x0,y0,w0,h0);
char *text;
ETEXT_DESC monitor;
api->RecognizeForChopTest(&monitor);
text = api->GetUTF8Text();
printf("text: %s\n", text);
printf("m.count: %s\n", monitor.count);
printf("m.progress: %s\n", monitor.progress);
api->RecognizeForChopTest(&monitor);
text = api->GetUTF8Text();
printf("text: %s\n", text);
...
api->End();
And build this code:
g++ -g -I. -I/usr/local/include -o _test test.cpp -ltesseract_api -lfreeimageplus
(i need FreeImage for picture loading)
I'm using windows OS, I tried all solutions above and none of them work.
Finally, I install Tesseract-OCR on D drive(Where I run my python script from) instead of C drive and it works.
So, if you are using windows, run your python script in the same drive as your Tesseract-OCR.
In Google Colab I resolved the issue in this way:
!sudo apt-get install tesseract-ocr-*
Because if you use this command !sudo apt install tesseract-ocr then it imports 2 languages but when you intend to work on non-English languages then the former command works.
Afterwards, use this command !pip install pytesseract
You can also check languages in this way !tesseract --list-langs
I'm using Visual Studio 2017 Community Edition.
I solved this problem by making a directory called tessdata in the Debug directory of my project. Then I put the eng.traineddata file into said directory.
C# developer working on Windows here. What works for me is simply download the file eng.traineddata from the following URL:
https://github.com/tesseract-ocr/tessdata/blob/master/eng.traineddata
and copy it to the following directory in my Console Application project:
[Project Directory]\bin\Debug\tessdata
I did manually create the tessdata folder above.
tessdata_dir_config = r'--tessdata-dir "/usr/local/Cellar/tesseract/4.1.1/share/tessdata"'
pytesseract.image_to_string(imgCrop,lang='eng',config=tessdata_dir_config)
Add this to your code :
instance.setDatapath("C:\\somepath\\tessdata");
instance.setLanguage("eng");
How I solved the problem in my Manjaro Xfce:
Message “TesseractError: (1, 'Error opening data file /home/julio/snap/tesseract/common/eng.traineddata Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory. Failed loading language 'eng' Tesseract couldn't load any languages! Could not initialize tesseract.')”
Then, in my Manjaro, I typed: sudo pacman -S tesseract
Then the system installed both the “tesseract” and also a package name “leptonica”
After this step, I thought everything was ok, and tried to run my simple script. However, the error message changed to something like this (it changed the previous “/home” location to other “/usr”-like location):
“"Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory. Failed loading language 'eng' Tesseract couldn't load any languages! Could not initialize tesseract.')"”
Then I realized that there had appeared this message when I installed “tesseract” with pacman: “You must install one of tesseract-data-* packages or whole tesseract-data group”
So, I tried the command: “sudo pacman -S tesseract-data”, and the system presented lots of language options to me. So I’ve chosen some languages, installed as follows, and the module started to work like a charm:
sudo pacman -S tesseract-data-eng
sudo pacman -S tesseract-data-por
sudo pacman -S tesseract-data-fra
sudo pacman -S tesseract-data-spa
I tried some portuguese special characters (like "ão"), that only worked when I used the argument "lang='por'" in the pytesseract.image_to_string(img,lang='por')
As of 2021, My solution for Ubuntu is to download the zip files from https://github.com/tesseract-ocr/tessdata_best/releases/tag/4.1.0, extract and copy the neccessary .traineddata files into /usr/local/share/tessdata. This is the default folder for tesseract 4.1.1 to search for trained data.
I had the same problem with DEU language on macOS. I could solve it by installing all additional languages like so:
brew install tesseract-lang
as suggested on https://formulae.brew.sh/formula/tesseract
**IF you have windows OS then please add your TesseractOCR to system variable.
Eg..
Find the path where Tesseract is installed in your c drive (in my case r"C:\Program Files\Tesseract-OCR\tesseract.exe")**
2)make sure you have the required files ie tessdata, tessdata if not then download it from https://github.com/tesseract-ocr/tessdata https://github.com/tesseract-ocr/langdata (At least those languages which you want to convert)
past it into the main directory in my case C:\Program Files\Tesseract-OCR
4)Add the path of the directory to your system environment variable
for that
search environment variable in start bar
go to environment variable
click path in your system environment variable (NOT IN USER ENVIRONMENT VARIABLE)
past the path of tesseractocr
thats all...
My host (iPage) does not have JSON.pm installed. I don't want to use the modules they have installed (XML) in order to transfer data from a CGI script back to a web page. Is there anyway that I can use JSON without them installing it on Perl?
The reason I ask is because I noticed when I downloaded the JSON zip that I had to run a makefile json.pm command but I don't have access to a Unix shell or a SSH terminal.
If your Perl is new enough, 5.14 and up, it will come with JSON::PP, a pure Perl implementation of the JSON parser. Confusingly it does not come with JSON.pm. So try use JSON::PP and see if it works.
Otherwise, follow Ilmari's instructions. If you switch to a host with shell access, you can use local::lib to manage CPAN modules.
You should be able to install a local copy of the pure Perl version of the JSON module without shell access. Just download the .tar.gz archive to your own computer, unpack it and copy everything under the lib subdirectory to a suitable location on your webhost.
You'll also need to tell Perl where to find the module, for which you need to know the filesystem path to which you copied the module. For example, if you copied the contents of the lib directory to /home/username/perl-lib on your webhost, then you would include in your code the lines:
use lib '/home/username/perl-lib';
use JSON;
Depending on how your webhost is configured, you might also be able to use $ENV{HOME} to obtain the path to your home directory, so that you can write:
use lib "$ENV{HOME}/perl-lib";
use JSON;
or you could try using the FindBin module to find the path to the directory containing your script, and locate the lib directory from there (see the example in the FindBin documentation).
i want to use my mysql databases in weka in order to analysis data.
i download the mysql-connector-java-5.0.8-bin.jar and put that in weka folder in my program Files folder, and add this path to system variable path, but when i open the weka explorer and click the openDB, i don't know what should i write in the url textbox,
i don't know completely what should i do?
the error that i saw is:
problem connecting to database:
no suitable driver found for!
please give me a total guidance, thanks in advance.
add mysql-connector-java-5.1.12-bin.jar to CLASSPATH .
or put it in weka folder, navigate to weka installation folder and run command :
%java_home%/bin/java -Xmx300M -cp ".;weka.jar;mysql-connector-java-5.1.12-bin.jar;" weka.gui.GUIChooser
then click open DB and
fill in the proper user+password
put the url: jdbc:mysql://localhost:3306/DATABASENAME
Click Execute. The result window should show the results now.
For Weka 3.7.10, the classpath system environment variable is not took into account (at leat under Windows 7). The only working approach for me was to modify the RunWeka.ini file from the Weka installation folder as follows: the cp= setting was modified to:
cp=%CLASSPATH%;d:/Programs/jdbc/mysql-connector-java-5.1.26/mysql-connector-java-5.1.26-bin.jar
whereas only the %CLASSPATH%; setting was originally provided. Does not make much sense, but in worked.
find some introduction to WEKA and the environment variable:
http://weka.wikispaces.com/CLASSPATH
Copy mysql-connector-java-X.X.XX-bin.jar to /usr/share/java/
unizip /usr/share/java/weka.jar
edit: /usr/share/java/weka/experiment/DatabaseUtils.props
add:
jdbcDriver=com.mysql.jdbc.Driver
jdbcURL=jdbc:mysql://localhost:3306/test (with your server)
add shell
export CLASSPATH=/usr/share/java/mysql-connector-java-X.X.XX-bin.jar:
export CP=/usr/share/java/mysql-connector-java-X.X.XX-bin.jar::/usr/share/java/:/usr/shared/java/weka.jar
execute weka:
java -cp $CP -Xmx500m weka.gui.explorer.Explorer
Ready