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

[Eric Perko]

On Tue, Mar 15, 2011 at 3:03 PM, Daniel Maturana <dimatura at gmail.com> wrote:

> 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.
>

The correct link for ROS Answers is answers.ros.org, not ros.answers.org .

- Eric


> 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
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> > ros-users at code.ros.org
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> >
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