[ros-users] Bad performances with cameradc1394

[Shadow]

Eric :
Thanks, image+view is a great solution to show what I wanted.
Unfortunately, it is the same problem than before, around 50% of my
processor being used.

Gary : 
I've tried both 320*240 and 640*480 pictures, and the difference of
computing between those two resolution is not significant. I don't know
how to define more clearly what is eating too much :
3748 hand      20   0 84984  22m  15m S   52  1.1   0:04.23
cameradc1394      
What I did to test that was to launch the driver and to display the
picture at the same time with roslaunch.

Le mercredi 12 mai 2010 à 07:30 -0400, Eric Perko a écrit :
> Have you tried using image_view (http://www.ros.org/wiki/image_view)
> on your raw image topic?
> 
> For example, it should be something like 'rosrun image_view image_view
> image:=/camera/image_raw'. You can determine the actual image topic
> using 'rostopic list'.
> 
> If you still want to display with OpenCV, you can take a look at the
> CvBridge package (http://www.ros.org/wiki/cv_bridge) to convert
> between ROS images and OpenCV images.
> 
> - Eric
> 
> On Wed, May 12, 2010 at 6:04 AM, Shadow <sacha at shadowrobot.com> wrote:
> > Hi,
> > I am trying the camera1394 driver right now to see if the same problem
> > occurs, but I can not manage to display the frame with that driver using
> > opencv, like it was easy to do with cameradc.
> >
> > I am using the latest Ubuntu with kernel 2.6.32-22, and here is my
> > firewire card :
> > 00:08.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire
> > II(M)] IEEE 1394 OHCI Controller (rev c0)
> > 00:09.0 FireWire (IEEE 1394): NEC Corporation uPD72874 IEEE1394 OHCI 1.1
> > 3-port PHY-Link Ctrlr (rev 01)
> >
> > If there is any integrated solution to display the stream, let me know,
> > since the problem only occurs when it is displayed.
> >
> > Thanks.
> >
> > Le mardi 11 mai 2010 à 11:59 -0500, Jack O'Quin a écrit :
> >> On Tue, May 11, 2010 at 11:31 AM, Eric Perko <wisesage5001 at gmail.com> wrote:
> >> > Sacha,
> >> >
> >> > Have you seen the same behavior with the newer camera1394
> >> > (http://www.ros.org/wiki/camera1394) driver or is this just the
> >> > cameradc1394 driver?
> >>
> >> If the problem appears with both drivers (likely IMHO), you are
> >> probably not getting DMA access due to some difficulty in your
> >> low-level library or kernel drivers.
> >>
> >> What distribution, kernel and firewire card are you running?
> >
> >
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> >
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