[ros-users] north pacific gyre robotic sampler

Peter Brook pbrook at cs.washington.edu
Sun Jul 18 04:32:36 UTC 2010


The video seems to be marked as private. Was this intentional?

Peter Brook

On Sat, Jul 17, 2010 at 9:29 PM, Andrew Harris <andrew.unit at gmail.com>wrote:

> Dear colleagues,
>   I am using ROS to build a robotic ocean sampler that can sample sea
> water and use computer vision to count and characterize plastic
> debris.  Plastic is collecting in our oceans at an alarming rate and
> this robotic sampler is designed to float in the North Pacific Gyre
> for several months, taking samples periodically.  It is still in an
> early stage, but here is a link to the video of playing back a bag
> file that has telemetry and imagery inside:
> http://www.vimeo.com/13424611
> For context, the images are of backlit transparent tubing that is
> about 1cm in diameter.  You'll see plastic particles go by
> occasionally.  On a related note, if anyone has a hint on how to
> calibrate a camera that has a field of view of about 1cm x 1cm at a
> distance of 25cm, I'd appreciate any hints :)  I have been thinking
> about making a teeny tiny checkerboard, but I'm not really sure of the
> best way to do that yet.  Also, I am using the camera1394 node with a
> Point Grey Chameleon and it is working nicely.
> regards,
> -andrew
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