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AdrienB commented on AdrienB's blog post Calibrating the viewing direction of optic-flow sensors
"Hi Randy, Thanks for the feedback! The choice for the focal length of your lens really depends on a lot of things. To name a few: - Amount of light in the environment. A bigger zoom usually means that the sensor gets less light. In my application, I…"
Wednesday

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Randy commented on AdrienB's blog post Calibrating the viewing direction of optic-flow sensors
"Wow, fantastic work! There are a number of interesting things in that paper, at least for me.  Obviously the calibration process is fantastic and I wish I could free up the time immediately to implement in arducopter.  There are other…"
May 24
AdrienB commented on AdrienB's blog post Calibrating the viewing direction of optic-flow sensors
"@Ruwan: Were you presenting anything flying-related ? @Geoffrey: Thanks for you comment ;)"
May 24
Geoffrey L. Barrows commented on AdrienB's blog post Calibrating the viewing direction of optic-flow sensors
"@Adrien- This is very cool and practical! Thank You!"
May 24
AdrienB posted blog posts
May 24
Ruwan commented on AdrienB's blog post Calibrating the viewing direction of optic-flow sensors
"I was there @ICRA. Too bad I missed your talk :-("
May 24
AdrienB commented on Mike's blog post Underwater Glider Completes First-Ever Unmanned Ocean Crossing
"For a very informative interview of Oscar Schofield from Rutgers University about the autonomous underwater glider, visit the Robots Podcast: http://www.robotspodcast.com/podcast/2010/02/robots-auv-missions-html/"
May 3
AdrienB commented on Geoffrey L. Barrows's blog post RC micro helicopter hover (yaw and height) using millimeter thick vision camera
"Thanks for the answer Geoffrey ! And what about lateral control ? Here I assume that it's the passive stability of the coax that keeps it roughly in the same position (?). Could you use a similar vision-based technique to control the lateral…"
Dec 7, 2011
AdrienB commented on Geoffrey L. Barrows's blog post RC micro helicopter hover (yaw and height) using millimeter thick vision camera
"Hi Geoffrey,Thanks for sharing! Your work is very interesting. I'm impressed by the stabilization and how it only uses the small vision sensor. No inertial sensor is even required ? I wonder if you have to make assumptions about the environment…"
Dec 5, 2011
AdrienB commented on Geoffrey L. Barrows's blog post Micro Helicopter Hovering in Place Using Vision Sensing
"Wow, impressive results! How comes I can't see any optics in front of the sensors actually ?"
Jan 28, 2010
AdrienB replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Hi Bill, I understand your remarks and it indeed makes sense that the "1 minus the cosine of the angle-of-attack" error should be negligible. Thanks for the clear explanations, Best, Adrien"
May 12, 2009
AdrienB replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Hi Bill, Thanks for the reply ! "Test flights so far have shown that the compensation works rather well." I have no doubt that the compensation already works rather well, (even without compensation the complementary filter should work in…"
May 10, 2009
AdrienB replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Hi, Thank you for the interesting algorithm, and for all the detailed information given in the comments ! I think the compensation of the centrifugal force is very promising, and I wanted to understand a little bit better how you implemented it…"
May 8, 2009

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AdrienB's Blog

Calibrating the viewing direction of optic-flow sensors

Posted on May 24, 2012 at 3:00am 5 Comments

Members of DIY Drones using optical flow sensors, such as the ADNS3080 that is available in the DIYDrones store, or the …

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