Showing posts with label stereo. Show all posts
Showing posts with label stereo. Show all posts

Friday, October 19, 2012

Hardware synchronizing a stereo rig of ps3 eye usb cameras

2 Links:

http://www.instructables.com/id/The-EyeWriter-20/?ALLSTEPS
http://nuigroup.com/forums/viewthread/12445/#66879

Thursday, October 18, 2012

Viewing stereo usb cameras on ROS

Download and install the uvc_camera drivers

Edit the uvcCameraLaunch.launch to contain the following:
<!--xml-->
<launch>
      <node pkg="uvc_camera" type="stereo_node" name="uvc_camera_stereo">
        <param name="width" type="int" value="320" />
        <param name="height" type="int" value="240" />
        <param name="fps" type="int" value="30" />
        <param name="frame" type="string" value="wide_stereo" />
    <param name="right/device" type="string" value="/dev/video1" />
        <param name="left/device" type="string" value="/dev/video2" />
     </node>
</launch>

launch this stack by:  ROS_NAMESPACE=stereo roslaunch UAVcam uvcCameraLaunch.launch

View the published messages: rostopic list
make sure the ros_namespace precedes the /left and /right image stream messages.

To view each stream:
$ rosrun image_view image_view image:=/stereo/left/image_raw
$ rosrun image_view image_view image:=/stereo/right/image_raw 
If you have a built-in webcam, I disabled it using the following:
by adding "blacklist uvcvideo" to the end of the file /etc/modprobe.d/blacklist.conf
I made sure uvcvideo was the name of the driver being used for this webcam using hwinfo 
(you must restart for the webcam to be disabled)
 
Then run the camera_calibration.
http://www.ros.org/wiki/camera_calibration/Tutorials/StereoCalibration 
 
 
 
 




Wednesday, October 17, 2012

ps3 eye usb camera and ROS

How to work with playstation ps3 eye USB camera and ROS and OpenCV

http://siddhantahuja.wordpress.com/2011/07/20/working-with-ros-and-opencv-draft/

For stereo:
https://code.ros.org/gf/project/ros/mailman/?_forum_action=ForumMessageBrowse&thread_id=55017&action=ListThreads&mailman_id=20