Error in installing node open cv in windows

[peterbraden]

Error in installing node open cv in windows

[parthmehta]

Any solution for this issue ?

[jandrieu]

I have the same issue. I have OpenCV installed on my machine, but not pkg-config. I ended up reconstructing the flags directly in the binding.gyp, but it wasn't pretty. In fact, I couldn't get it to compile. Node-gyp stopped complaining, but the last error I had was a slew of warnings and two specific errors with matrix.cc

[lots of these conversion warnings...]
..\src\Matrix.cc(1109): warning C4244: 'initializing' : conversion from 'double
' to 'float', possible loss of data [C:\Tests\node_modules\opencv\build\binding.s
ln]
..\src\Matrix.cc(1139): error C3861: 'round': identifier not found [C:\Tests\node
_modules\opencv\build\binding.sln]
..\src\Matrix.cc(1140): error C3861: 'round': identifier not found [C:\Tests\node
_modules\opencv\build\binding.sln]
[followed by even more conversion warnings]

[seyedaed]

I just wanted to add this as maybe it might help someone. I've been trying to get it working on Windows 7 64bit. I seem to be able to get things to compile but I still get an error. I'll post the error below but maybe some of these steps can help you out. If your using 32bit try using 32bit sources instead.

Steps to install and compile on 64 windows7

Install opencv @ - (I used version 2.4.4)

http://opencv.org/downloads.html

Install python version 2.7 @
http://www.python.org/download/releases/2.7/install pkg-config by downloading the all in one bundle @ - (I used Gtk+ 3.6.4)

http://www.gtk.org/download/win64.php

Add the following to your path variables

C:\pkg-config\bin;C:\OpenCV\build\x64\vc11\bin;

Install visual-studio in 4 steps

First install Visual C++ 2010 Express
Second install Windows SDK for windows 7 and .net framework 4
Third install Visual Studio 2010 Service Pack 1
Fourth install Visual C++ 2010 Service Pack 1 Compiler

Download notcoffeetable/node-opencv fork

https://github.com/notcoffeetable/node-

opencv

Open windows sdk 7.1 command prompt <- need

This one specifically as it sets path information for kernel

Navigate to the directory containing the downloaded branch

Type node-gyp rebuild

You will get several warnings. If you get an error that says something about Round not being found in Matrix.h try this.

Edit ./src/Matrix.cpp add at the bottom

inline double round( double d ) { return floor( d + 0.5);}

Try node-gyp rebuild again. It should work with several warning.

To install just type npm install

Error trying to run node contour.js

module.js:356
Module._extensions[extension](this, filename);
^
Error: The specified module could not be found.
C:\Users\deadeyes\Desktop\nodeJS\node_opencv\node-opencv-master\build\Release\op
encv.node
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)
at require (module.js:380:17)
at Object. (C:\Users\deadeyes\Desktop\nodeJS\node_opencv\node-ope
ncv-master\lib\bindings.js:1:80)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Module.require (module.js:364:17)

[mrgreene]

seyedaed, you ever get a solution to your error? I think I've got something similar going on.

[thomasbaldauf]

Same here! Please help with this, thanks!

[jack545]

same errors related to opencv on node. Kindly help!

Same thing here, this is going to be a show-stopper.

[brianofrokk3r]

Same issue as @subhendusc

[funky81]

Hi @seyedaed ....

Thanks for guidance. I have successfully install node-opencv over my windows 10
following is my walk-through to install this

1. Download Install opencv @ - (I used version 2.4.4)
   http://opencv.org/downloads.html
   Put it in c:\opencv
2. Install python version 2.7 @
   http://www.python.org/download/releases/2.7/
   put it in c:\python27
3. install pkg-config by downloading the all in one bundle @ - (I used Gtk+ 3.6.4)
   http://www.gtk.org/download/win64.php
   put it in c:\pkg-config
4. Add the following to your path variables
   C:\pkg-config\bin;C:\OpenCV\build\x64\vc11\bin;
5. Install visual-studio in 4 steps
6. First install Visual C++ 2010 Express
7. Second install Windows SDK for windows 7 and .net framework 4
8. Third install Visual Studio 2010 Service Pack 1
9. Fourth install Visual C++ 2010 Service Pack 1 Compiler
10. Download npeterbraden/node-opencv fork
    git clone https://github.com/peterbraden/node-opencv
11. edit file src/Matrix.cpp
    put "inline double round( double d ) { return floor( d + 0.5);}" below "cv::Rect* setRect(Local objRect, cv::Rect &result);"
12. run npm install