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Re: [Flightgear-users] webcam-only headtracker addon (WIP)
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From: Siyui A. <so...@gm...> - 2010-04-09 03:56:10
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I have download the fg-ehci-headtracker, but to make, the following errors happened: bash-3.1# make g++ -g -O3 -Wall `pkg-config --cflags opencv` -c ehci.cpp Package opencv was not found in the pkg-config search path. Perhaps you should add the directory containing `opencv.pc' to the PKG_CONFIG_PATH environment variable No package 'opencv' found ehci.cpp:22:16: error: cv.h: No such file or directory ehci.cpp:23:21: error: highgui.h: No such file or directory ehci.cpp:42: error: expected constructor, destructor, or type conversion before '*' token ehci.cpp:46: error: variable or field 'loadCascade' declared void ehci.cpp:46: error: 'CvHaarClassifierCascade' was not declared in this scope ehci.cpp:46: error: 'cascade' was not declared in this scope ehci.cpp:46: error: expected primary-expression before 'const' make: *** [ehci.o] Error 1 bash-3.1# I am not sure what had happend to opencv that I have just installed, It is realy there: /usr/local/include/opencv/ Lots of .h files in this directory, and this: /usr/local/share/opencv/ some more files how to config and use pkg-config tool to let the fgehcii program build correctly? Many many thanks! 2010/2/28 Melchior FRANZ <mf...@ao...>: > Head trackers determine the position and orientation of the computer user's > head, and use this information to modify the view in the artificial 3D world. > Usually, this requires a sensor (e.g. a webcam) and special markers mounted > on a helmet or cap. This can be colored/reflective points or even (IR)LEDs. > > There's a (F/OSS) implementation of a head-tracker that only requires a > webcam, without the head gear: EHCI[0] (based on OpenCV[1]). It works with > a face detection algorithm. See the following link for a demo. It shows the > analyzed face features on the left side, and an overlaid 3D head on the > right side. > > http://www.youtube.com/watch?v=BovphSjw_tI > > Unfortunately, it doesn't work as well as the film implies. The guy took > care of not turning the head too far and keeping the face rectangle nicely > on screen. If one doesn't do that, then the orientation quickly drifts off, > and one has to reset the tracker. > > Anyway, in the hope to see further EHCI improvements in the future, I've > written an fgfs addon that uses the tracker information to control the > pilot's view. It's a separate application that communicates via UDP socket > with fgfs, and there are no changes to fgfs (2.0!) necessary. See the README > for further info: > > $ git clone git://gitorious.org/fg-ehci-headtracker/fg-ehci-headtracker.git > > Maybe someone is interested in this *and* can perhaps even send me patches > for improvements/fixes. :-) > > Note that the EHCI library is a bit strange (to put it politely), which > explains some of the fg-tracker weirdness. Also note, that you have to > use it in not too dark environment (or maybe use an IR spot, haven't tried > that yet). And I assume you should have a dual core/cpu machine at least. > The tracker uses quite some cpu power for image processing, so it shouldn't > run on the same cpu/core as fgfs. > > m. > > > PS: don't expect too much! > > [0] http://sourceforge.net/projects/opencvlibrary/ > [1] http://code.google.com/p/ehci/ > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Flightgear-users mailing list > Fli...@li... > https://lists.sourceforge.net/lists/listinfo/flightgear-users > |