4 ms·

Don't these cameras require to be stabilized? You only have one column of pixels so you can not correctly align the columns through stitching (as in panorama mo

Don't these cameras require to be stabilized? You only have one column of pixels so you can not correctly align the columns through stitching (as in panorama mode on phones). As impressive as the stabilization used is that these dromes manage to hover in roughy the same spot (instead of drifting everywhere), I do not believe it will be sufficient for a rotating line camera.

michaelmior 5y ago
I don't know how well it would work, but I think you could still perform alignment using a single column assuming that you would expect to see patches with the same color connected together more often than not. Especially if you're trying to do video since then you can also exploit temporal coherency (meaning that you expect many objects to be stable over time). I'm sure in my head it's much simpler than practice, but it seems like it is achievable at least in theory. Sounds like a very fun problem for computer vision researcher to work on. Probably not terribly difficult to generate a bunch of test data from existing 360 cameras by downsampling.
ncmncm 5y ago
The column images can be tagged with samples from an onboard gyro and compass. The stitcher does not need to rely only on the pixels themselves. Normally the next pass will be pointing a little higher or lower, so such annotations will be essential.
- dayjaby 5y ago
  Gyro? Relying on just angular velocities doesn't provide any good tags. You probably mean accelerometer or a combination of these referred to as IMU. And even then, the raw data of these sensors are extremely noisy, so you need something like an EKF to get a more reliable attitude of the drone. THIS can actually be used to tag photos.
  - ncmncm 5y ago
    If "onboard gyro and compass" means something to you substantially different from an IMU+EKF system, it makes me wonder what century you are talking about. My comment was about tagging pixel column data with non-optical measurements. Spewing alphabet soup fails to add clarity, and does not even make you look smarter. Given adequate bandwidth, EKF can be better applied at the receiver, where more computational power is available.
    - dayjaby 5y ago
      Alphabet soup? Sorry, but nothing that you say makes any sense and I politely corrected you regarding the extremely stupid idea to tag any raw sensor informations. Your new proposal of streaming this kind of data to an offboard processor just proves that you have zero dot zero zero experience about what you are talking about.
      - ncmncm 5y ago
        You have contributed exactly nothing with your grandstanding. You should be ashamed.
        deleted 5y ago
        [deleted]

michaelmior 5y ago

I don't know how well it would work, but I think you could still perform alignment using a single column assuming that you would expect to see patches with the same color connected together more often than not. Especially if you're trying to do video since then you can also exploit temporal coherency (meaning that you expect many objects to be stable over time). I'm sure in my head it's much simpler than practice, but it seems like it is achievable at least in theory. Sounds like a very fun problem for computer vision researcher to work on. Probably not terribly difficult to generate a bunch of test data from existing 360 cameras by downsampling.

ncmncm 5y ago

The column images can be tagged with samples from an onboard gyro and compass. The stitcher does not need to rely only on the pixels themselves. Normally the next pass will be pointing a little higher or lower, so such annotations will be essential.

dayjaby 5y ago
Gyro? Relying on just angular velocities doesn't provide any good tags. You probably mean accelerometer or a combination of these referred to as IMU. And even then, the raw data of these sensors are extremely noisy, so you need something like an EKF to get a more reliable attitude of the drone. THIS can actually be used to tag photos.
- ncmncm 5y ago
  If "onboard gyro and compass" means something to you substantially different from an IMU+EKF system, it makes me wonder what century you are talking about. My comment was about tagging pixel column data with non-optical measurements. Spewing alphabet soup fails to add clarity, and does not even make you look smarter. Given adequate bandwidth, EKF can be better applied at the receiver, where more computational power is available.
  - dayjaby 5y ago
    Alphabet soup? Sorry, but nothing that you say makes any sense and I politely corrected you regarding the extremely stupid idea to tag any raw sensor informations. Your new proposal of streaming this kind of data to an offboard processor just proves that you have zero dot zero zero experience about what you are talking about.
    - ncmncm 5y ago
      You have contributed exactly nothing with your grandstanding. You should be ashamed.
      - deleted 5y ago
        [deleted]