{"id":1150,"date":"2013-07-19T15:35:13","date_gmt":"2013-07-19T07:35:13","guid":{"rendered":"http:\/\/www.magicandlove.com\/blog\/?p=1150"},"modified":"2014-03-28T13:02:06","modified_gmt":"2014-03-28T05:02:06","slug":"build-opencv-on-mac-osx","status":"publish","type":"post","link":"http:\/\/www.magicandlove.com\/blog\/2013\/07\/19\/build-opencv-on-mac-osx\/","title":{"rendered":"Build OpenCV on Mac OSX"},"content":{"rendered":"

When I posted the use of OpenCV in Processing<\/a>, there were a number of queries about installing and building OpenCV in OSX. In this post, I try to summary the process. It assumes basic understandings of the Unix environment of the OSX system with the use of the Terminal command. Here are the steps.<\/p>\n

<\/p>\n

You need to have a login password for your current account and it should be an administrator. The password is required for the sudo<\/strong> command in later step.<\/p>\n

Open the Terminal<\/strong> command line interface from \/Applications\/Utilities<\/strong> folder.<\/p>\n

Show the hidden files in your OSX system following the steps in this reference<\/a>. You are going to check the files installed in the folders \/usr\/bin<\/strong> and \/usr\/local<\/strong>.<\/p>\n

Install the cmake<\/strong> software. I use the Homebrew<\/strong> system to install it. You can refer the Homebrew website<\/a> for the installation of the Homebrew system. It is just a line in the Terminal window:<\/p>\n

ruby -e \"$(curl -fsSL https:\/\/raw.github.com\/mxcl\/homebrew\/go)\"<\/pre>\n
It requires you to enter your login password. To install the cmake<\/a> software, use the brew <\/strong>command in the Terminal window:<\/p>\n
brew install cmake<\/pre>\n
After the installation, you can use the brew list<\/strong> command to verify.<\/p>\n
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Download<\/a> the Mac\/Linux version of the OpenCV. The current one I am using is 2.4.6.1.<\/p>\n
Unpack the file in your hard disk. The folder name is opencv-2.4.6.1.<\/p>\n
In the Terminal window, use cd<\/strong> command to change the current directory to the opencv-2.4.6.1 folder.<\/p>\n
Create a build<\/strong> folder and change current directory to it.<\/p>\n
\r\nmkdir build\r\ncd build\r\n<\/pre>\n
Verify that you have the gcc<\/strong> and g++<\/strong> compilers in the \/usr\/bin folder.<\/p>\n
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They are actually two aliases that point to the correct compilers as shown in the next figure.<\/p>\n
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Now, we can use the interactive ccmake<\/strong> to configure the build options:<\/p>\n
\r\nccmake .. -DCMAKE_C_COMPILER=\/usr\/bin\/gcc -DCMAKE_CXX_COMPILER=\/usr\/bin\/g++\r\n<\/pre>\n
Type the ‘c’ key to enter the configuration process. I use minimal options to configure the build process as shown in the following screenshots.<\/p>\n
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Type the key ‘c’ again to validate all the options. After it is done, type the key ‘g’ to generate the files for building OpenCV.<\/p>\n
In the Terminal<\/strong> window command line, enter make<\/strong> to start the building process. It may take some time.<\/p>\n
\r\nmake\r\n<\/pre>\n
When it is 100% done with success, proceed to the installation step by:<\/p>\n
\r\nsudo make install\r\n<\/pre>\n
It will prompt for the password. The process will install the files into proper folders of the Unix system.<\/p>\n
For the Java related files, they will be in the bin<\/strong> and lib<\/strong> sub-folders of the build<\/strong> folder. The opencv-246.jar<\/strong> file will be in the bin<\/strong> folder.<\/p>\n
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The libopencv_java246.dylib<\/strong> will be in the lib<\/strong> folder.<\/p>\n
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These two files:<\/p>\n