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2017-10-12 12:57:42 -0500 | answered a question | cameracalibrator.py GUI opens but is not drawn I think i see the problem here. Through my own trials i observed that the symptoms you are describing occur when the ima |
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2017-10-12 11:05:54 -0500 | commented question | cameracalibrator.py GUI opens but is not drawn I'm having the exact same issue after installing 16,04 fresh. Did you ever resolve this issue? Would be very interested |
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2016-05-09 16:05:44 -0500 | asked a question | Getting Frame Transform With Shared Parent Because ROS (python indigo at least) does not like reverse traversing the TF tree it won't perform a transform between two frames that share a parent. For example if you have a parent frame Base which has two child frames Left_Wheel and Right_Wheel, ROS will happily find the transform between Base and either child, but cannot find the transform between Left_Wheel and Right_Wheel. I have a convoluted workaround for this which involves setting up a local transformer, inverting one of the the child transforms and setting it as the parent of the shared parent. This is super unpleasant and has to be done every single time I want to perform this transform. Is there a smarter way to do this? Thanks |
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2016-04-11 16:21:58 -0500 | answered a question | Combine position estimates from Lidar SLAM and PTAM Not sure about this situation specifically, but in general robot localization is a great tool for fusing pose estimates |
2016-04-07 09:46:43 -0500 | asked a question | Can't launch libuvc_camera I'm trying to use libuvc_camera to get my usb camera working on a nodelet to reduce CPU usage, but I'm having a lot of trouble. I've brute-forced my way through most of my problems, but now I'm stonewalled. Every time I try to boot the launch file I just get Here's my launch file: And here is the error: And here's the relevant data from lsusb -v FAQS:
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2016-02-17 13:56:54 -0500 | answered a question | What are x and y in map_msgs/OccupancyGridUpdate? Figured it out through testing. X and Y refer to the corner of the occupancy grid update in the occupancy grid frame |
2016-02-17 13:42:31 -0500 | asked a question | What are x and y in map_msgs/OccupancyGridUpdate? I'm trying to do some things with occupancy grids, and I cannot figure what the x and y attributes refer to. Anyone know? Thanks, David |
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2016-02-16 11:11:03 -0500 | asked a question | Checking if a Pose would be in Collision Hey ROS Hive-Mind, I've been trying out a new localization method and I'm trying to validate my poses before accepting them for robot updates. I was going to write a service to do this, but it occurs to me there is probably already one that is used elsewhere since this seems like a pretty useful thing. Closest I've found so far is link:move_base/make_plan, but that's not actually what I want since I'd have to give a starting position and it could return a negative response for reasons other than the end point is in collision. Ideally this service would also take into account the inflation layer. Does anyone know of a service that may meet my needs? Or should I just go ahead and write my own. Thanks, David |
2015-11-19 12:18:30 -0500 | asked a question | Properly Bring Down Active Node? I'm currently using ros::shutdown() to bring down a node that I need to kill in c++. I'm fairly certain this is bad as the node fails ungracefully and does not seem to release all of its resources. Is there a better method? |
2015-11-18 08:21:45 -0500 | commented answer | Modifying Ros Driver Before Installing thanks i'll give this a shot |
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2015-11-17 17:06:42 -0500 | asked a question | Modifying Ros Driver Before Installing Hi all, I need to make some rather specific changes to a ros driver specifically to the ros-indigo-pointgrey-camera-driver, before installing it. Does anyone know how I can do this? thanks, David |
2015-11-16 13:10:09 -0500 | commented answer | Point Grey Camera Image Consistency Issue Exactly 50% Unfortunately i'm still having this issue. I'm attempting to use the drivers on your git and and getting a compilation error on " fatal error: flycapture/FlyCapture2.h: No such file or directory #include "flycapture/FlyCapture2.h" is there a dependency i missed? thanks |
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