Kostas Alexis
  • Male
  • Reno, NV
  • United States
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Kostas Alexis posted a blog post

Robotized Radiation Mapping

Dear community members,This is very preliminary work on aerial robotic radiation detection in real-time and in a GPS-denied manner. The robot localizes based on visual-inertial data and integrates a deferentially installed 2-radiation detectors solution to exploit their polarity characteristics. Most of the research is ahead but we feel the topic is exciting and would like to communicate it to all of you. In this link you can get updates of our relevant work: …See More
Apr 25
Cameron Owen commented on Kostas Alexis's blog post Autonomous Exploration and Mapping in Darkness
"Great stuff! Are you going to make the work accessible for others to test? If not is there a plan to commercialise the system? As you might have guessed, my interest is in underground mining."
Mar 9
Kostas Alexis commented on Kostas Alexis's blog post Autonomous Exploration and Mapping in Darkness
"Hi Cameron, thanks for your interest. There is no use of UWB or other external localization system. The system performs localization solely based on the camera images and the IMU. The ToF sensor supports the mapping task. You are very correct…"
Mar 9
Cameron Owen commented on Kostas Alexis's blog post Autonomous Exploration and Mapping in Darkness
"Are the cameras it's using localise fixed to the environment or the drone? Does it use UWB to help localise (with reference to your TOF comment)? What I'm getting at is if I drop this in an underground mine, can it map out a newly blasted…"
Mar 8
Kostas Alexis posted blog posts
Mar 7
Andreas Gazis commented on Kostas Alexis's blog post Autonomous Exploration and Inspection Using Flying Robots
"Eyes. Passive, cheap to run, hungry processing but if you are hauling a body through the air you are paying a high premium already. No wonder evolution has converged upon them multiple times. We have the cams, we have the FPGAs, we suck at…"
Jan 29, 2016
Kostas Alexis commented on Kostas Alexis's blog post Autonomous Exploration and Inspection Using Flying Robots
"@Andreas,  There is a very large body of work on the problem. Few comments on all of those what you say: About the VI-Sensor: what you read at Skybotix website is true. So it is not a commercial system that a third-party can buy now. But be…"
Jan 29, 2016
Kostas Alexis commented on Kostas Alexis's blog post Autonomous Exploration and Inspection Using Flying Robots
"@Rob It is not quite as you say. Yuneec is using direct depth data from the Realsense. Here it is very different with having to do all the calculations based on a camera-IMU system. However, a camera is not limited to a very small distance as…"
Jan 29, 2016

Profile Information

Please tell us a bit about your UAV interest
Aerial Robotics Autonomy
Hometown:
Reno

Kostas Alexis's Blog

Robotized Radiation Mapping

Posted on April 25, 2017 at 6:26pm 0 Comments

Dear community members,

This is very preliminary work on aerial robotic radiation detection in real-time and in a GPS-denied manner. The robot localizes based on visual-inertial data and integrates a deferentially installed 2-radiation detectors solution to exploit their polarity characteristics. Most of the research is ahead but we…

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Autonomous Exploration and Mapping in Darkness

Posted on March 7, 2017 at 2:00pm 3 Comments

We would like to share two of our recent and ongoing results related to autonomous exploration and mapping in darkness. As opposed to approaches that rely on localization based on LiDAR systems, the videos below rely on visual-inertial localization with LEDs illuminating the scene appropriately. For the first case, visible-spectrum cameras are…

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Autonomous Exploration and Inspection Using Flying Robots

Posted on January 28, 2016 at 10:53pm 11 Comments

Hi all, 

We recently released this video on autonomous exploration and inspection. Have a look!

Summary: 

The robot employs its visual-inertial navigation system in order to localize itself in the environment and simultaneously map it and 3D reconstruct it. Based on the newly proposed "Receding Horizon Next-Best-View…

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"Autonomous Christmas Lab": a robotic "Merry Christmas!"

Posted on December 16, 2014 at 7:00am 4 Comments

Dear members of the drones community,

For one more year... the time has come! 

The Autonomous Systems Lab at ETH Zurich just released the "Autonomous Christmas Lab 2014" video! Watch and share! Robots are indeed excellent Christmas…

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Wireless sensor network control Drones?

Posted on May 11, 2010 at 2:43am 7 Comments

Hello to community!



It is a great fact that UAVs tend to miniaturization. Despite the high technology advances on microprocessors and embedded systems it is clear that only simple control laws can be implemented into Miniature Autonomous Vehicles. Note that i am not talking for rf manned control but for fully autonomous solutions. So what about Wireless Sensor Network control for Drones? It is an idea implemented widely in ground robots. The main approach is to implement on-board only… Continue

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