Hello,
This is a repost of a question asked over at [Ask Ubuntu](http://askubuntu.com/questions/41402/opencv-and-firefly-mv-in-ubuntu "Ask Ubuntu") where I thought this might be more appropriate, but sadly I didn't get any bites.
I'm trying to get up and running with a Point Grey Firefly MV with ROS and OpenCV. I've installed ROS (Desktop-Full, if it matters) on Ubuntu 10.10, and installed the camera_drivers package. After much poking and prodding I've gotten ROS, OpenCV, and libdc1394 installed and (apparently) functioning correctly. I wrote a ROS launch file which should start the camera and display the output in a window on my computer. However, when I run this launch file, I get the following errors from libusb and libdc1394:
libusb couldn't open USB device /dev/bus/usb/002/007: Permission denied.
libusb requires write access to USB device nodes.
libdc1394 warning: usb: Failed to open device for config ROM
libdc1394 warning: Failed to get config ROM from usb device
libusb couldn't open USB device /dev/bus/usb/002/007: Permission denied.
libusb requires write access to USB device nodes.
libdc1394 warning: usb: Failed to open device for config ROM
libdc1394 warning: Failed to get config ROM from usb device
libusb couldn't open USB device /dev/bus/usb/002/007: Permission denied.
libusb requires write access to USB device nodes.
libdc1394 warning: usb: Failed to open device for config ROM
libdc1394 warning: Failed to get config ROM from usb device
This is followed by an error from ROS:
[ERROR] [1305210297.868750292]: [camera] device open failed: [Camera1394::open]: No cameras found
I'm assuming that this has to do with udev rules, but I'm not sure how to fix it (I'm unfamiliar with messing with udev rules in general).
If it helps, here's the permissions for the particular device:
bradpowers@bp-rosdev:~/ros/launch$ ls -la /dev/bus/usb/002/007
crw-rw-r-- 1 root root 189, 134 2011-05-12 08:16 /dev/bus/usb/002/007
Thanks in advance for your help!
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