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Lucas Walter
Attended University of Washington
Lives in Seattle
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Lucas Walter

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microphone audio -> +GStreamer  encoding +ROS  node -> AudioData msg -> gstreamer decoding ros node -> [-1.0 - 1.0] float array message -> draw waveform in Image (or do whatever with float array)

https://github.com/lucasw/audio_common/tree/appsink
The next step is to have an input node that will subscribe to a float array then encode it with gst, then the existing audio_common audio_play node could play it from speakers.

When drawing waveforms of sequential buffered chunks of a signal, it seems like it would be best to find the phase of the highest strength frequency and then shift the next signal so that visually it doesn't jump around.
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A Portland OR +ROS meetup group was create last month:
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Powersliding with ROS: The AutoRally Platform: http://goo.gl/t2Wn7C #GoROS
From Brian Goldfain at Georgia Tech. We're the AutoRally team from Georgia Tech and we're pushing autonomous driving to the extreme with our AutoRally robot. Our robot reaches speeds of 20mph driving fully autonomously using only onboard sensing and computing at our test track, ...
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+Alastair Reynolds :

'Pleased to announce that I've sold a pair of stories set in two of my established universes. The first, "Belladonna Nights", takes place in the House of Suns timeline a few million years earlier than the events of the novel. Campion plays a part in the story. This will appear in an as-yet-untitled original anthology with an exceedingly interesting conceptual premise, and I was really thrilled to be able to contribute something.

The second, longer piece, is entitled "The Iron Tactician" and is a new novella featuring my long-running character Merlin. Previous Merlin stories were "Merlin's Gun" (1999), "Hideaway" (2000) and "Minla's Flowers" (2007). The very tentative plan at the moment is that the novella will appear as a standalone chapbook, but we should have a firmer idea in a few months, and of course I'll give fuller details on where these stories will appear in due course.'
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Lucas Walter

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I believe the robots fight each other laser tag style, I'm excited to try them out. Another interesting design feature is the mecanum wheels which allow them to move sideways.
 
Battle with +ROS  robots Wednesday July 27th 7pm at the new Flatstick Pub in Pioneer Square, and hear about the robots from one of the +Robodub inc engineers.
We'll try out the Robodub game which has recently opened at the new Flatstick Pub in Pioneer Square, and hear about the technology from one of their engineers. http://www.robodub.com/
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This is now in Bellevue at the +Robodub inc offices, see the meetup page for details.
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There are multiple comments about this seeming creepy, which I don't get at all- on the scale of 1 to Japanese synthetic flesh robot which has tunneled right through the astroturf plains of the uncanny valley down to bedrock I'd give SpotMini a 2.

On the other hand the dinosaur head gripper strongly suggests a two legged version with a tail ought to be made.
 
This is the latest version of Spot (SpotMini) which is quite small (55 lbs) and all electric.
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It's just the start to Grimlock...
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A Linux car-like robot powered by +ROS
At Erle Robotics we create artificial brains for robots and drones based in Linux. Our brains build their intelligence using the Robot Operating System (ROS) and have access to a cloud-based app store for robots and drones.
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Moving from blogspot to lucasw.github.io
Moving from blogspot to http://lucasw.github.io/
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Distort an image using the +OpenCV plumb bob model, then undistort it, and observe the error created along the way.  Distortion is useful for testing and simulation (+Gazebo Sim does have distortion for camera sensors as of version 5.0 http://gazebosim.org/tutorials?tut=camera_distortion , I need to try it out)

rqt dynamic reconfigure works okay for this, but the slider needs to be nonlinear, and it ought to update even before the slider is released- most of these distortion coefficients have huge effects even when small.  Because of that in the video I am only typing in numbers rather than using the slider.

https://github.com/lucasw/vimjay/blob/master/src/standalone/distort_image.cpp

+ROS 
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I thought this would focus more on the +DARPA Robotics Challenge as a sporting event and follow the teams and build drama over the course of the hour, instead it spends about 40 minutes on background material and then the last 15 on the event.  I haven't watched it recently but I remember 'The Great Robot Race' being better produced.

22:30 Shadow Robot gripper

28:00 Baxter

31:27 DRC user interface

48:10 - using a steering wheel to steering- presumably the software figures out the arm movements necessary to turn the wheel just like the remote operator is turning it.

49:00 "If the robot is still, the operator is very busy- if the robot is moving the operator isn't doing anything"

The video goes behind a paywall 3/23/16.
How will human-like robots change our future and how we see ourselves?
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Have them in circles
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Introduction
Currently working on underwater 3D laser scanners and various machine vision/computer vision systems.  I used to do avionics for a small aerospace company.


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Seattle
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The most pedestrian friendly board game store in Seattle. Lots of demo games and tables to play them on. There are some bottled drinks and snacks but more food options would be nice (though there are plenty of food venues within a block).
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