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2016-08-02 20:52:54 -0500 | commented answer | How to calibrate dual (stereo) camera and obtain data? It seems to have worked, with some modifications and in combination with another package. Thanks :) And I spent all day today trying to extract depth data using the stereo images - with little success. If this is similar to what you're doing, do you think we can share notes? Thanks! |
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2016-07-14 20:51:31 -0500 | answered a question | Irobot Create 2 installation issues I came across this, which may help you: |
2016-07-14 20:51:30 -0500 | asked a question | How to calibrate dual (stereo) camera and obtain data? Hi, My knowledge of ROS/Linux is limited, so I'm hoping someone could kindly help me. I am using Virtual Box running Linux 14.04, and ROS Indigo. I am trying to use a dual camera setup in order to obtain stereo vision via ROS. The cameras are on this USB module that I can access, and when I try to open it in Windows, I see the cameras as two different devices. I can also see them as two video devices on my VM.
However, both cheese nor GTK UVC video viewer was unable to open the device. Cheese says "There was an error playing video from the webcam" even though I can see the device being selected in its Preferences. GTK UVC just captures blackness. I also tried to use cv_camera but that did not give me a launch file to use. So I tried libuvc_camera but that also didn't give me a launch file. I basically did these and not sure how to go from there, without a launch file:
I don't know how to get them to work. I then tried to do the same with the usb_camera package, which has a launch file:
But when I used the launch, I get these errors:
Basically 1) I don't know if my webcam is actually connected and 2) I don't know how to use the packages that might help me extract the camera data (let alone stereo data). I know I need to do camera calibration at some point, but I thought libuvc_camera is the best option for that. I'm very stuck, so any help is appreciated. Thank you. |