There is an image_view in the rviz package that might be faster. (no
guarantee)

On Thu, 2010-05-13 at 10:43 +0100, Shadow wrote:
> 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@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@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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> > > ros-users@code.ros.org
> > > https://code.ros.org/mailman/listinfo/ros-users
> > >
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> > 
> 
> 
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