opencv

OpenCV Sourceforge Project sourceforge.net/projects/opencvlibrary/

Ruby/OpenCV Author’s Web Page blueruby.mydns.jp/opencv

DESCRIPTION:

OpenCV Ruby Wrapper

FEATURES/PROBLEMS:

First release rubygems, Some OpenCV function wrapped.
Use of Carbon windows on Mac OS X is a little buggy, especially when called from the command line.
Sadly, use of X Windows as an alternative on Mac OS X is similarly buggy.

REQUIREMENTS:

OpenCV 1.0 or later. sourceforge.net/projects/opencvlibrary/
OpenCV has several dependencies, see INSTALLATION INSTRUCTIONS below
ffcall (optional) www.haible.de/bruno/packages-ffcall.html

INSTALLATION INSTRUCTIONS

OpenCV is a requirement. Unfortunately there’s a bug in the code that affects our ability to use Carbon windows, so we can’t install from a port. We’ll have to install from source.
First, these are the dependencies we’ll need:
atk
pango
jpeg
tiff
libpng
pkgconfig
gtk2
glib2
ffcall
Use ports to install them: $ sudo port install atk pango jpeg tiff libpng pkgconfig gtk2 glib2 ffcall
Ports is going to install them in /opt/local, which is where this gem will go looking for ffcall, so that will work well for us.
Next, download version 1.1pre1 of the opencv-linux package here: sourceforge.net/project/showfiles.php?group_id=22870
Navigate to where you downloaded it and: tar xzvf opencv-1.1pre1.tar.gz cd opencv-1.1.0/
Important: Before we configure and build, we need to fix a small bug in the code. Open up the file otherlibs/highgui/window_carbon.cpp in a text editor and make this change to line 645:

return NULL;

should be changed to

return result;

(This bug is tracked in sourceforge here: sourceforge.net/tracker/index.php?func=detail&aid=2668857&group_id=22870&atid=376677)

Now save the file and we can continue.

./configure –with-carbon=yes CPPFLAGS=“-I/opt/local/include -I/usr/include/malloc” LDFLAGS=-L/opt/local/lib

After configure runs, it will print out a display showing which libraries are in use. Double-check that the windowing system is using “Carbon/Mac OS X” and not gtk Finish installing:

make
sudo make install

The last of the output from the install command will probably complain about not being able to find ldconfig. That’s fine. You’re on a Mac; you don’t need ldconfig (macosx.com/forums/mac-os-x-system-mac-software/5200-ldconfig.html).

Now install the gem

sudo gem install bantic-ruby-opencv

Check your work:

$ irb
irb&gt; require 'rubygems'
=&gt; true
irb&gt; require 'opencv'
=&gt; true

SYNOPSIS:

# Show image via GUI Window.

require “rubygems” require “opencv”

image = OpenCV::IplImage.load(“sample.jpg”) window = OpenCV::GUI::Window.new(“preview”) window.show(image) OpenCV::GUI::wait_key

# other sample code, see examples/*.rb

LICENSE:

The BSD Liscense

see LICENSE.txt