Nice, thanks for the pointers, Dejan! Radu. Dejan Pangercic wrote: > Hi there, > I've done some literature research but mostly on detection of > transparent objects. Here are some pointers: > http://www.goneneren.com/publications > http://www.robotic.de/fileadmin/robotic/hillenbd/Hillenbrand_08.pdf > http://www.willowgarage.com/additive-latent-feature-model-transparent-object-recognition > > I plan to attack this problem in the next half a year and I am thus > very willing to hear about from the rest of community. > > cheers, D. > On Fri, Apr 2, 2010 at 7:03 PM, Caroline Pantofaru > wrote: >> I haven't done a literature search, but off the top of my head I would be >> tempted to look at the ground (if you can see it) to provide an indication >> that there might be a wall. Sometimes there's a bit of wall beneath the >> glass, or at least the flooring type/color/pattern will change. It's a hack, >> but it might help. >> >> On Fri, Apr 2, 2010 at 9:59 AM, Radu Bogdan Rusu >> wrote: >>> Yeah, plus they heavily depend on how the light reflects, angles, etc. >>> Reflections are evil ;) I haven't seen too much >>> work on actually getting stereo from that. Is there any work on >>> artificially generating reflections by manipulating >>> light (a PR2 with a flashlight moving around would be cool :) )? >>> >>> Cheers, >>> Radu. >>> >>> Kurt Konolige wrote: >>>> Don't forget that reflections will be seen by stereo as behind the >>>> glass...kk >>>> >>>> On Fri, Apr 2, 2010 at 9:44 AM, Radu Bogdan Rusu >>>> wrote: >>>>> Hi Eric, >>>>> >>>>> Ouch, glass walls. No, unfortunately there isn't a lot that can be done >>>>> with LIDAR sensors there. You can try to use >>>>> reflections to generate stereo data and hope for the best, but that's >>>>> not going to work everytime. You are right, >>>>> employing sonars might help. Did you check the literature to see what >>>>> other people are using to deal with glass? >>>>> >>>>> Cheers, >>>>> Radu. >>>>> >>>>> Eric Perko wrote: >>>>>> Hey all, >>>>>> >>>>>> After looking at the wiki for ROS sonar packages, I started wondering. >>>>>> Currently, the robots I work on have issues detecting glass walls, as >>>>>> their primary range sensor is a SICK LMS291, which pings right through >>>>>> the glass (obviously). To solve this for a robotic tour guide >>>>>> application, we are looking into sonars. >>>>>> >>>>>> So my question is, what are some approaches that you use to detect >>>>>> things such as glass walls that both LIDARs and cameras might have >>>>>> trouble with? Can the PR2 see glass walls and, if so, how? >>>>>> >>>>>> Thanks >>>>>> Eric Perko >>>>>> wisesage5001@gmail.com >>>>>> eric.perko@case.edu >>>>>> mobilerobots.case.edu >>>>>> _______________________________________________ >>>>>> ros-users mailing list >>>>>> ros-users@code.ros.org >>>>>> https://code.ros.org/mailman/listinfo/ros-users >>>>> -- >>>>> | Radu Bogdan Rusu | http://rbrusu.com/ >>>>> _______________________________________________ >>>>> ros-users mailing list >>>>> ros-users@code.ros.org >>>>> https://code.ros.org/mailman/listinfo/ros-users >>>>> >>> -- >>> | Radu Bogdan Rusu | http://rbrusu.com/ >>> _______________________________________________ >>> ros-users mailing list >>> ros-users@code.ros.org >>> https://code.ros.org/mailman/listinfo/ros-users >> >> _______________________________________________ >> ros-users mailing list >> ros-users@code.ros.org >> https://code.ros.org/mailman/listinfo/ros-users >> >> > > > -- | Radu Bogdan Rusu | http://rbrusu.com/