Update Core Addon : ofxOpenCv

[bakercp]

Need static libs for linuxarm6vl http://raspberrypi.stackexchange.com/questions/409/can-i-use-opencv http://eduardofv.com/read_post/185-Installing-OpenCV-on-the-Raspberry-Pi http://eduardofv.com/read_post/192-OpenCV-on-the-Raspberry-Pi-with-Arch-Linux-ARM etc

If you take this on, please clearly document your build procedure and post it on this wiki for future reference.

[jvcleave]

Is this something we should just use the ones available from apt-get?

[jvcleave]

there are libs in /addons/ofxOpenCv/libs/opencv/lib/linuxarmv6l - know where these came from?

[danzeeeman]

You can check the git blame? On Nov 25, 2012 5:51 PM, "Jason Van Cleave" notifications@github.com wrote:

there are lib in /addons/ofxOpenCv/libs/opencv/lib/linuxarmv6l - know where these came from?

— Reply to this email directly or view it on GitHubhttps://github.com/openFrameworks-RaspberryPi/openFrameworks/issues/18#issuecomment-10699902.

[bakercp]

btw, those libs are gone now and were dummies put there to test the new makefile's libsorder.make support.

Right now, this is pending a good way to allow addons to optionally link to native libs. This might happen via the addons.make file, or another file.

[jvcleave]

Good news! If you run sudo apt-get install libopencv-dev it will install all the necessary opencv static libs into /usr/lib with the exception of libopencv_haartraining_engine.a

you can then

mkdir /home/pi/openFrameworks/addons/ofxOpenCv/libs/opencv/lib/linuxarmv6l
cd /usr/lib/
cp libopencv*.a /home/pi/openFrameworks/addons/ofxOpenCv/libs/opencv/lib/linuxarmv6l/

I then copied libsorder.make from addons/ofxOpenCv/libs/opencv/lib/linux64 to addons/ofxOpenCvopencv/lib/linuxarmv6l and removed the line libopencv_haartraining_engine.a

Simple test http://i.imgur.com/f99wV.jpg Thresholding http://i.imgur.com/llG3U.jpg Random Threshold (about 30 fps) https://vimeo.com/55077432

Contourfinder works: http://i.imgur.com/A0eE7.jpg

https://gist.github.com/4231042

[bakercp]

Very nice! Given that it is already there, it seems that compiling for the platform from scratch isn't impossible. Definitely a job for someone with distcc running though. Are we currently using the haar training engine at all? I know we're using face recognition? If not, it seems like we should figure out a solution for addons that allows us to link to static or shared system libs without copying. It's still on the todo list ...

[jvcleave]

yeah - I would have just linked it but I am waiting for the new Make system to settle to figure out where the best place is to do it.

I am not sure if ofxCvHaarFinder.h requires libopencv_haartraining_engine.a . I am going to run a few common things through the addon to see if anything is broken

[arturoc]

yes i think we should solve the inclusion of pkg-config libraries and headers for addons, that way we can use this without copying the libraries.

there's actually several opencv packages:

libopencv-calib3d2.3 libopencv-features2d2.3 libopencv-highgui-dev libopencv-objdetect2.3 libopencv-calib3d-dev libopencv-features2d-dev libopencv-imgproc2.3 libopencv-objdetect-dev libopencv-contrib2.3 libopencv-flann2.3 libopencv-imgproc-dev libopencv-video2.3 libopencv-contrib-dev libopencv-flann-dev libopencv-legacy2.3 libopencv-video-dev libopencv-core2.3 libopencv-gpu2.3 libopencv-legacy-dev
libopencv-core-dev libopencv-gpu-dev libopencv-ml2.3
libopencv-dev libopencv-highgui2.3 libopencv-ml-dev

surely haartraining is in on of those

[jvcleave]

it looks like I have all of those packages installed :/

pi@raspberrypi ~/openFrameworks/examples $ dpkg --get-selections | grep cv
gpicview                    install
libcv-dev                   install
libcvaux-dev                    install
libopencv-calib3d-dev               install
libopencv-calib3d2.3                install
libopencv-contrib-dev               install
libopencv-contrib2.3                install
libopencv-core-dev              install
libopencv-core2.3               install
libopencv-dev                   install
libopencv-features2d-dev            install
libopencv-features2d2.3             install
libopencv-flann-dev             install
libopencv-flann2.3              install
libopencv-gpu-dev               install
libopencv-gpu2.3                install
libopencv-highgui-dev               install
libopencv-highgui2.3                install
libopencv-imgproc-dev               install
libopencv-imgproc2.3                install
libopencv-legacy-dev                install
libopencv-legacy2.3             install
libopencv-ml-dev                install
libopencv-ml2.3                 install
libopencv-objdetect-dev             install
libopencv-objdetect2.3              install
libopencv-video-dev             install
libopencv-video2.3              install

[jvcleave]

It took 141 seconds but surprisingly ofxCvHaarFinder still works without the training engine lib.

http://i.imgur.com/VCYJT.jpg

edit: got it to 65 seconds by doing it in setup (was previously doing it with a delay in update)

[bakercp]

Very cool. I'm thinking the haar training engine is for creating your own haar training data sets (i.e. creating the frontal, profile, etc xml data).

[Meach]

I haven't checked ofxCvHaarFinder but I confirm that with jvcleave instruction, the example works on the pandaboard as well. Great!

[jvcleave]

This line in config.make will allow you to compile without copying the libs PROJECT_LDFLAGS=-Wl,-rpath=./libs $(shell pkg-config opencv --libs 2> /dev/null)

[bakercp]

For the moment (until we figure out a smart addons system that can pull from system libs), I copied the static libs into the repo. All examples are now working out of the box (although the haar finder example still takes a while!).

Closed with a85f9bc1b5bc48454777f859801adffa421ec16b

[kalwalt]

hi @bakercp @arturoc and all ,the example ofxOpenCv in PandaboardES build succesfully but in Liveo video mode i have only a black window. I'm using the develop-raspberrypi branch. i will try disabling some ofxopencv draw to see if it is a memory issue.

[kalwalt]

@bakercp @arturoc we can close this issue. i tested ofxopenCV with latest develop-raspberrypi and it's fine . Also i have linuxarmv7l libs here: https://github.com/kalwalt/openFrameworks/tree/feature-openCv-linuxarmv7l i'm going to open a pull request for this.

[bakercp]

done!