[ros-users] flat surfaces become "waved" using stereo_image_proc

[Sabrina Kliegl]

Hi,

thank you for your answer. There is no option in stereo_image_proc to enable 
or disable interpolation. As far as I know, interpolation is part of OpenCV's 
stereo block matcher which is used by stereo_image_proc. Are there other 
stereo algorithms available in ROS?

I will ask about the "wave" effect on answers.ros.org as you suggested.

Regards,
Sabrina

Am Dienstag 15 März 2011, 20:03:19 schrieb Daniel Maturana:
> I haven't used stereo_image_proc in a while, but those 'waves' are
> what the subpixel interpolation is supposed to avoid. Each 'wave'
> corresponds to a discrete pixel disparity. So the interpolation is
> either not working, or not working well enough. I would check whether
> the interpolation is enabled. Also, you might want to ask at
> ros.answers.org.
> Daniel
> 
> On Mon, Mar 14, 2011 at 1:19 PM, Sabrina Kliegl <skliegl at get.upb.de> wrote:
> > Hi,
> > 
> > using stereo_image_proc I observe that flat surfaces appear waved in the
> > resulting point cloud - with growing "wavelength" for farer points. Is
> > this because of the quadratic interpolation done by stereo_image_proc
> > for subpixel accurancy? Is there any option to reduce this effect (which
> > is really bad for drivability analysis)?
> > 
> > Curious about your answers,
> > Sabrina
> > _______________________________________________
> > ros-users mailing list
> > ros-users at code.ros.org
> > https://code.ros.org/mailman/listinfo/ros-users
> 
> _______________________________________________
> ros-users mailing list
> ros-users at code.ros.org
> https://code.ros.org/mailman/listinfo/ros-users