1. Generate OpenCV makefile using cmake (e.g. cmake CMakeLists.txt)
2. Compile using makefile generated at (1) (e.g. make -j8)
3. Install generated files (e.g. make install)
4. Export opencv shared library path:
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
5. Compile your program like this: "g++ [source file goes here] `pkg-list opencv --config`"
Sunday, April 19, 2015
Wednesday, April 15, 2015
TCP/IP Programming in GO
Out of curiosity I googled around TCP/IP programming in Go! And guess what? It looks really beautiful! I found this great article explaining how to build a simple chat server in Go:
http://www.badgerr.co.uk/2011/06/20/golang-away-tcp-chat-server/
What's very interesting to me is the concept of "channel". In Android programming world, it's like a Handler. You can have any function posts something to it and it will magically get received by the handler function. And yes, channel posting and receiving is in a single thread, just like the default behavior of Handler in Android. Check out the article above, it explains many of the basic concepts really well.
http://www.badgerr.co.uk/2011/06/20/golang-away-tcp-chat-server/
What's very interesting to me is the concept of "channel". In Android programming world, it's like a Handler. You can have any function posts something to it and it will magically get received by the handler function. And yes, channel posting and receiving is in a single thread, just like the default behavior of Handler in Android. Check out the article above, it explains many of the basic concepts really well.
Monday, April 13, 2015
Synergy on ARM
I just recently got myself an NVIDIA Jetson TK1. Exciting! While developing using it, unfortunately it's quite slow to browse the website or listening to music through it.
So I had an idea to install Synergy client to it, while the server is on my laptop that's connected to it through Ethernet.
As there's no prebuilt Synergy for ARM 32bit, here's how you build it:
1. Download the source code from official synergy site
2. Download cmake, curl, and x11 dev libraries:
sudo apt-get install cmake libcurl4-openssl-dev libx11-dev libxtst-dev build-essential
3. After (2), compilation will still fail. You have to edit the include directory path on CMakeList.txt: Search for /usr/local/include and modify it to /usr/include
4. If you happened to had a compilation failure, try removing CMakeCache.txt and re-compile
5. If you encounter problem related to gmock, go to ext folder and extract gmock..zip to appropriate folder. There will be another cmake inside of it, build.
5. Enjoy!
Resource:
http://www.rootusers.com/compiling-synergy-from-source-on-the-raspberry-pi/
So I had an idea to install Synergy client to it, while the server is on my laptop that's connected to it through Ethernet.
As there's no prebuilt Synergy for ARM 32bit, here's how you build it:
1. Download the source code from official synergy site
2. Download cmake, curl, and x11 dev libraries:
sudo apt-get install cmake libcurl4-openssl-dev libx11-dev libxtst-dev build-essential
3. After (2), compilation will still fail. You have to edit the include directory path on CMakeList.txt: Search for /usr/local/include and modify it to /usr/include
4. If you happened to had a compilation failure, try removing CMakeCache.txt and re-compile
5. If you encounter problem related to gmock, go to ext folder and extract gmock..zip to appropriate folder. There will be another cmake inside of it, build.
5. Enjoy!
Resource:
http://www.rootusers.com/compiling-synergy-from-source-on-the-raspberry-pi/
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