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  1. Re: Qt Quick3D: "GL graphics system is not active; cannot use 3D items"

    Ah OK, I had seen your thread - I just thought only your Symbian build worked. I don't use QtCreator right now, but just throwing it at it and have it figure things out is a solution, which has...
  2. Re: Qt Quick3D: "GL graphics system is not active; cannot use 3D items"

    Thanks to Patrick Burke [who just opened the Gitorious Qt3D repository not too long ago today] I've been able to build a running version by now. The only thing I'm still interested in is why Qt...
  3. Re: Qt Quick3D: "GL graphics system is not active; cannot use 3D items"

    Ah, thanks very much. But now I get The file is located in my qt-qt/quick3d/src/quick3d subdirectory, but as a beginner I just don't know how to tell Qt about it.

    I changed my main.cpp to...
  4. Qt Quick3D: "GL graphics system is not active; cannot use 3D items"

    Hi,

    I've written a QML program with Qt Quick3D, which among other things renders an STL mesh. This works fine with qmlviewer, but if I build a minimal C++ frame around it like this
    #include...
  5. Re: N900 Front Camera Spec (Sensor Size or Focal Length)

    Hi,

    I also require the focal length for a pose estimation algorithm. Can I simply hardcode 5.2mm? I read there is a way to get it via V4L. Does anybody know how to do this? Will it give me the...
  6. Re: Yet another N900 + Maemo + Meego + NITDroid Thread

    This guy has a running version: http://www.youtube.com/watch?v=LLwxQZvXR7I

    I kind of lost interest in it currently, since NITDroid doesn't support the camera iirc. You somehow have to call...
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    Re: Inverting a 3D transformation

    Hi Daniil,

    your reply has been very helpful to me for other reasons (as always), but it actually didn't solve the problem this time, since the projection matrix I obtain the transformed image with...
  8. Yet another N900 + Maemo + Meego + NITDroid Thread

    Hi,

    I've just "installed" Meego (merely a bzcat meego-handset-armv7l-n900-final-mod-1.1.0.0.20101101.3-mmcblk0p.raw.bz2 | dd bs=4096 of=/dev/sdb) on my N900's 8GB microSDHC card and it works...
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    Re: Inverting a 3D transformation

    My idea is that images are 2D, but I perform 3D transformations on them and accordingly need 3D points to invert such transformations, not 2D ones. Accordingly, I asked for the z-coordinate. I now...
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    Re: Inverting a 3D transformation

    The feature points are warped back into my initial image, centered correctly and even vaguely resemble the objects of the image, but they are shrinked down.vertically if I rotated around the x-axis...
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    Inverting a 3D transformation

    Hello everybody,

    for object recognition I perform transformations on a reference image (rotation, scale, optionally shear), then detect feature points in the resulting transformed image and warp...
  12. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    Thanks to Samuel Rødal this problem is solved. With one (rather rhetorical) question he made me realise that the problem was merely an illusion, because I had anticipated a much more complex error...
  13. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    Hi,

    my problem boils down to this issue: If I draw an image the usual way I build up a QTransformation
    //transform.translate((ctrlPoints.at(0) - center).x(),(ctrlPoints.at(0) - center).y());...
  14. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    Again, you're absolutely right, achipa - thanks for pointing that out. It doesn't change anything about the problem, however, since I just made sure three times that I definitely get RGB32 according...
  15. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    ARGH!! The formats are driving me insane. So I loaded an image.


    QMessageBox::information(this, tr("Affine Transformations"),tr("Image format: %1").arg(image.format()));...
  16. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    @tamhanna: No, I haven't. And I'm unsure how. That's the problem. But I currently use usual blur and try to make the basic program run for now.

    @achipa: Yes. I need the transformed image, so I try...
  17. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    OK, the OpenCL library issue is solved: I obviously had to add the directory to LD_LIBRARY_PATH, not PATH. Shame on me.

    Only one question remains:
    How can I retrieve the transformed image in the...
  18. Re: Starting Image Processing: Affine transformations, blur & feature extraction [upd

    Thank you. With this the feature extraction works. But two aspects remain:


    How can I get the transformed image? Anybody can test this: Start the demo "Affine Transformations" in Qt. If you want...
  19. Starting Image Processing: Affine transformations, blur & feature extraction [upd.]

    Hi,

    I need a Qt app, which displays images (later also videos), processes them with QPainter, OpenCV and renders OpenGL on top. I'm not sure, how to implement it.

    I currently extend the "Affine...
  20. Re: no element "faceblur"', even though I did install libcv4

    This is so awesome. Thank you very much. I built a cool edgedetect pipeline: gst-launch v4l2camsrc device=/dev/video0 ! video/x-raw-yuv,width=480,height=272 ! videorate ! capsfilter...
  21. Re: no element "faceblur"', even though I did install libcv4

    How often have you saved my life, Daniil? Thank you.

    For the record: I tried installing debhelper7 from the repository (even removed the old debhelper), put the old rules back in as well as the...
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    Re: Use Gstreamer + Opencv

    Will it also eliminate the need for a gst-opencv port? Since I have very little time it would be interesting to know how you estimate the usefulness of this endeavour. Do both approaches perform...
  23. Re: no element "faceblur"', even though I did install libcv4

    Thanks for the suggestion, but I fear that won't help: If you replace dh_clean, it will fail with the same error in dh_prep, if you replace or comment this, it will fail with dh_installdirs, then...
  24. Re: Background music and sound FX for Qt/Maemo

    Yes: http://koti.mbnet.fi/mertama/sdl.html
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    Re: Use Gstreamer + Opencv

    http://discussion.forum.nokia.com/forum/showthread.php?203047-no-element-quot-faceblur-quot-even-though-I-did-install-libcv4

    Btw: I didn't mean to hijack your thread, just researched an answer for...
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