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John Arne Birkeland commented on Chris Anderson's blog post Why anti-poaching drones haven't worked well
"My first thought was maybe some variation of a hyperspectral camera?"
Apr 5, 2019
John Arne Birkeland commented on Chris Anderson's blog post Why anti-poaching drones haven't worked well
"1. When the human body and the ambient temperature are almost the same, a better TI camera with better sensitivity/resolution will only help marginally. The increased sensitivity will also lead to more false positives.
2. When/if a drone is able to…"
Mar 24, 2019
John Arne Birkeland commented on Chris Anderson's blog post Ion drive drone -- NO moving parts!
"To bad the available power to weight ratio is going to be problematic for any practical applications."
Nov 24, 2018
John Arne Birkeland commented on yangdaonline's blog post 30X zoom camera for fix wing and VTOL, with object tracking
"@Yangda
I mean absolute PTZ positioning. Meaning that you can go to a specific position, read the gimbal angle and camera zoom values via serial, and then later input (serial) those values to make the camera go back to the exact same position again."
Sep 11, 2018
John Arne Birkeland commented on yangdaonline's blog post 30X zoom camera for fix wing and VTOL, with object tracking
"Hi, Does the gimbal support absolute positioning when controlled via the serial port?"
Sep 8, 2018
John Arne Birkeland commented on Jack Crossfire's blog post The 1st fatality caused by a self driving car
"Looking at the crash video, something was obvious very wrong with the system. Lidar and radar should both have detected the person long before she got in front of the car regardless of lighting conditions, and finally the visual system should have r…"
Mar 27, 2018
John Arne Birkeland commented on Charles Blouin's blog post Pacific Drone Challenge
"My first thought was to build a blimp, giving you 'unlimited' flight time to solar charge batteries etc. My second was that Japan to USA is the same direction as Jet streams flow if I am not mistaken."
Jan 20, 2018
John Arne Birkeland commented on Patrick Meier's blog post World Bank launches Open AI Challenge for Aerial Imagery of South Pacific
"As usual PR statements are dumbed down to a level where they contain no actual information. The AI mission criteria and data sets can be found here.
https://docs.google.com/document/d/16kKik2clGutKejU8uqZevNY6JALf4aV...

Quote from original link:
Th…"
Jan 14, 2018
John Arne Birkeland replied to Paulo Neves's discussion Campaign for Sony Multiport protocol reverse engineering
Dec 2, 2017
John Arne Birkeland commented on Chris Anderson's blog post First pass at a Drone family tree diagram
"Hi Chris,
Depending on what message you are telling, I think it is a bit of a oversimplifications to say that RC are 'pilots' and robotics is 'developers'.
The RC community has always been extremely DIY oriented. For a very long time that was the on…"
Nov 23, 2017
John Arne Birkeland replied to Hussien Jarrar Atieh's discussion What is the purpose of the PPM encoder in APM2?
"Hi,
ICP5 is Input Capture Pin 5. Meaning it has an input capture interrupt that is tied to hardware Timer 5. So every time you have a signal change on the ICP5 pin (rising or falling edge depending on setup), you get a interrupt call that already co…"
Nov 23, 2017
John Arne Birkeland commented on Alex Williams's blog post Open source underwater glider
"Best example of a true open-source/DIY spirited project I have seen in a long time."
Oct 19, 2017
John Arne Birkeland commented on Chris Anderson's blog post Eagles vs Drones (spoiler: Eagles win)
"In my experience from flying normal RC planes, the trick is to gain altitude as quickly as possible. From a birds perspective if you are capable of flying higher then you are the predator. Doing sharp turns etc. only makes the bird more persistent,…"
Oct 1, 2017
John Arne Birkeland commented on Composites Connectors's blog post Make your next project faster, lighter and stronger
"Maybe it's just me that is old, but here is what I was thinking.. Composite connector"
Sep 30, 2017
John Arne Birkeland commented on Gary McCray's blog post Sony RX0 for $700.00 looks way better than GoPro
"While I agree about 4K not really being a must have resolution  yet, you at least want something one step above 1080p to be able to do post stabilization etc. and still get a nice 1080p result. If they included 2.7K I would probably get one."
Sep 2, 2017
John Arne Birkeland commented on Gary McCray's blog post Sony RX0 for $700.00 looks way better than GoPro
"Looks very promising. But Sony semi-pro products has a tendency to include some weird limitations to avoid competing with their own more expensive pro range of products. This time it's internal video recording resolution being limited to 1080p."
Sep 1, 2017
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