Geoffrey L. Barrows
  • Male
  • Washington, DC
  • United States
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Rana commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"I really enjoyed your write-up !"
Mar 22
Andreas Gazis commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"Using your own flight controller means you 'll have an uphill battle for adoption later on (one you will lose). The popular firmwares do what they do because that is what 99% of the users need (plus they already provide a modest window for what…"
Mar 22
Geoffrey L. Barrows commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"@Andreas, I agree, and we are on the same page. An issue that can be faced is that some see the off-board mode as undesirable. Apparently the off-board mode bypasses all sorts of safeguards that some understandably want to keep. Therefore any…"
Mar 21
Andreas Gazis commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"Offboard control will have to become the norm for vision based systems. The (quite demanding) computational muscle dictates the sensory hardware for vision systems. It is a very good idea to separate the electronics at the board level and allow each…"
Mar 21
Geoffrey L. Barrows commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"@Mateusz- Thank You for sharing it! I will check it out there..."
Mar 21
Geoffrey L. Barrows commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"@Andreas- You bring up some good points. I think that higher "D" avoidance systems are on the horizon, at least for larger drones, but once they are developed it will be quite awhile before they are plug and play. One of the points of my…"
Mar 21
Mateusz Sadowski commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"Thanks for the interesting write up Geoffrey! I'll share it in Weekly Robotics!"
Mar 21
Andreas Gazis commented on Geoffrey L. Barrows's blog post Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors
"Low R means either multirotors or specially designed planes. What if you forget about decreasing R? Are we anywhere near increasing D to the point where it might be usable to the typical unmodified plane (let's say close to 100 metres or even…"
Mar 20

Profile Information

About Me:
Founder of Centeye, Inc.
www.centeye.com
www.embeddedeye.com
Please tell us a bit about your UAV interest
Visual navigation for MAVs, embedded vision, bio-inspired signal processing
Hometown:
Washington, DC

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Geoffrey L. Barrows's Blog

Drone obstacle avoidance in 2003: 264 pixels and 8-bit processors

Posted on March 19, 2020 at 8:18am 8 Comments

Figure 1: (left) Foam drone with optical flow sensor mounted under a wing, Summer 2001. (right) Foam drone with optical flow sensors for attempted obstacle avoidance, Summer 2002.

Today it is universally acknowledged that drones operating close to the ground need some sort of obstacle avoidance. What I am about to tell is the story of our own…

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Artificial insect intelligence and vision for nano drones - how many pixels do you actually need?

Posted on March 1, 2020 at 8:01am 5 Comments

(Photo by Dustin Iskandar, CC BY 2.0)

My long-time interest has been in developing insect-type vision for small drones. Properly implemented, I believe that such vision hardware and algorithms will allow small drones to fly safely amidst clutter and obstacles. Of course, I have been following with great interest other approaches to providing…

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360 degree stereo vision and obstacle avoidance on a Crazyflie nano quadrotor

Posted on November 19, 2015 at 4:28pm 19 Comments

(More info and full post here)

I've been experimenting with putting 360 degree vision, including stereo vision, onto a Crazyflie nano quadrotor to assist with flight in near-Earth and indoor environments. Four stereo boards, each holding two image sensor chips and lenses, together see in all directions except up and down. We developed the image sensor chips…

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Visually stabilizing a Crazyflie, including in the dark

Posted on March 28, 2014 at 6:44am 10 Comments

I've been working on adding visual stabilization to a Crazyflie nano quadrotor. I had two goals- First is to achieve the same type of hover that we demonstrated several years ago on an eFlite 'mCX. Second is to do so in extremely low light levels including in the dark,…

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What can bees tell us about seeing and flying at night?

Posted on March 21, 2014 at 11:47am 3 Comments

(Image of Megalopta Genalis by Michael Pfaff, linked from Nautilus article)

How would you like your drone to use vision to hover, see obstacles, and otherwise navigate, but do so at night in the presence of very little light? Research on nocturnal insects will (in my opinion) give us ideas on how to make this possible.

A recent …

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Comment Wall (4 comments)

At 11:36pm on November 14, 2008, Scott James said…
Thanks Geoffrey.
At 6:01pm on March 2, 2010, Bhargav Gajjar said…
Hi Geoffrey I have a special MAV how hard is it to program your optic flow gizmos ?
At 7:29pm on March 2, 2010, Geoffrey L. Barrows said…
Bhargav- Do you mean integrate them with your system or actually program the devices themselves?
At 11:58pm on September 10, 2012, Andrew Comport said…

Hi Geoffrey, yes we have had a project on bridge inspection using the Infotron drone. You can find a little more information about the project here:

http://www.i3s.unice.fr/~comport/research/visual-servoing-of-drones


Your work looks pretty interesting too... I will have to have a look over it when I find some free time...

Best, Andrew

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