Using OpenCV 2.3.1a in Xcode 4

I'm now using Mac OS X to writing my OpenCV project

(install OpenCV in 1 minute, just open terminal and type the three red lines!!)

To build the environment, first we should have OpenCV in our OS

I use homebrew to install OpenCV 2.3.1a and I think it's very easy and fast.

First open your terminal and type

/usr/bin/ruby -e "$(/usr/bin/curl -fksSL https://raw.github.com/mxcl/homebrew/master/Library/Contributions/install_homebrew.rb)"

By doing this, homebrew is now inside your system.

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(homebrew works if you have already installed Xcode.)

then type brew install opencv

OpenCV 2.3.1a is now in your Mac OS X.

But we still have to install one componet -- Python.
Type brew install python
and now we can coding in Xcode 4

To coding in Xcode 4, we have to link our project to OpenCV library.

First, open Xcode and create a new project in Application -> Command Line Tool.
Click Next and choose C++ and set Product Name like wanesbbOpenCV
Click Next and choose where you want to save the project and you will see...
Then choose Project -> wanesbbOpenCV and find Header Search Path

insert three path inside the field
/usr/local/Cellar/opencv/2.3.1a/include
/usr/local/Cellar/opencv/2.3.1a/include/opencv
/usr/local/Cellar/opencv/2.3.1a/include/opencv2
(it's depend on the version homebrew use, so u better check it)

Then, find Library Search Path And insert one path inside the field
/usr/local/Cellar/opencv/2.3.1a/lib

Last, find Other Linker flags And insert one path inside the field
-L/usr/local/Cellar/opencv/2.3.1a/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_ml -lopencv_video -lopencv_features2d -lopencv_calib3d -lopencv_objdetect -lopencv_contrib -lopencv_legacy -lopencv_flann
(u can check this value by terminal using pkg-config opencv --libs)

Now, you can run with this code

[gist]http://gist.github.com/936194[/gist]

And show the pic you want!

To run it much better, remember to reopen the project so the Xcode can help you with Autocomplete
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