3 ms·

Hugged to death :/ How do they handle overhangs that trap bubbles? Maybe shaking and scanning in reverse? (can stall cause weird effects when the air can't ge

Hugged to death :/ How do they handle overhangs that trap bubbles? Maybe shaking and scanning in reverse? (can stall cause weird effects when the air can't get back in, but should be more detectable.

mrskeltal 9y ago
By dipping from various different angles
- anotheryou 9y ago
  I guess that would be possible, but one has to do some trickery to find false data. Maybe correlating the exact oposite dip works: Dipping a bowl shows a negative volume then the bowl begins to fill. A dome (reversed bowl) will show additional volume of trapped air at the same point.
- agumonkey 9y ago
  It's a bit like a fluid pet scan, each angle will give partial information, you "integrate" to gather the surface. Gives me ideas.
  - samstave 9y ago
    Think of the intro to the Ghost in the Shell, where the android body is floating up through a bath, and the manufacturer layer on the body is dissolving and being removed. This method could detect that the material is 100% removed from the body as well as confirm that the body is created exactly to spec.
falsedan 9y ago
They address this in the paper, but from the opposite angle (ho): It should be noted that our dipping scheme assumes that the object has no vertical _caps_ in any orientation. A cap is a vertical cavity that forms a vessel, in which water can be accumulated if the object is elevated vertically and air can be trapped, generating air pockets when the object is dipped in the opposite orientation. Most caps, if they exist, would be small and would have a minor effect akin to noise on the dip transform. Nevertheless, caps can be detected by dipping and then lifting back the object with the liquid trapped in the cap, yielding two different water levels. Flipping the object vertically allows detecting air pockets as they become caps.
- Stratoscope 9y ago
  Mobile friendly: > It should be noted that our dipping scheme assumes that the object has no vertical _caps_ in any orientation. A cap is a vertical cavity that forms a vessel, in which water can be accumulated if the object is elevated vertically and air can be trapped, generating air pockets when the object is dipped in the opposite orientation. Most caps, if they exist, would be small and would have a minor effect akin to noise on the dip transform. Nevertheless, caps can be detected by dipping and then lifting back the object with the liquid trapped in the cap, yielding two different water levels. Flipping the object vertically allows detecting air pockets as they become caps.
  - falsedan 9y ago
    Thanks, I forget that quoted text is horrible on HN on mobile.
    - mkl 9y ago
      You're not quoting text, you're formatting it as code. Just put "> " instead of indenting.
      - tripzilch 9y ago
        aren't there some pretty basic CSS rules to even make the formatted code look better on a narrow screen mobile? something like `white-space: pre-wrap`, IIRC? maybe I should look into how to add custom CSS rules to a particular site (HN), can you do that native in firefox, or does it need a plugin?
deleted 9y ago
[deleted]

Hugged to death :/ How do they handle overhangs that trap bubbles? Maybe shaking and scanning in reverse? (can stall cause weird effects when the air can't get back in, but should be more detectable.

mrskeltal 9y ago

By dipping from various different angles

anotheryou 9y ago
I guess that would be possible, but one has to do some trickery to find false data. Maybe correlating the exact oposite dip works: Dipping a bowl shows a negative volume then the bowl begins to fill. A dome (reversed bowl) will show additional volume of trapped air at the same point.
agumonkey 9y ago
It's a bit like a fluid pet scan, each angle will give partial information, you "integrate" to gather the surface. Gives me ideas.
- samstave 9y ago
  Think of the intro to the Ghost in the Shell, where the android body is floating up through a bath, and the manufacturer layer on the body is dissolving and being removed. This method could detect that the material is 100% removed from the body as well as confirm that the body is created exactly to spec.

falsedan 9y ago

They address this in the paper, but from the opposite angle (ho): It should be noted that our dipping scheme assumes that the object has no vertical _caps_ in any orientation. A cap is a vertical cavity that forms a vessel, in which water can be accumulated if the object is elevated vertically and air can be trapped, generating air pockets when the object is dipped in the opposite orientation. Most caps, if they exist, would be small and would have a minor effect akin to noise on the dip transform. Nevertheless, caps can be detected by dipping and then lifting back the object with the liquid trapped in the cap, yielding two different water levels. Flipping the object vertically allows detecting air pockets as they become caps.

Stratoscope 9y ago
Mobile friendly: > It should be noted that our dipping scheme assumes that the object has no vertical _caps_ in any orientation. A cap is a vertical cavity that forms a vessel, in which water can be accumulated if the object is elevated vertically and air can be trapped, generating air pockets when the object is dipped in the opposite orientation. Most caps, if they exist, would be small and would have a minor effect akin to noise on the dip transform. Nevertheless, caps can be detected by dipping and then lifting back the object with the liquid trapped in the cap, yielding two different water levels. Flipping the object vertically allows detecting air pockets as they become caps.
- falsedan 9y ago
  Thanks, I forget that quoted text is horrible on HN on mobile.
  - mkl 9y ago
    You're not quoting text, you're formatting it as code. Just put "> " instead of indenting.
    - tripzilch 9y ago
      aren't there some pretty basic CSS rules to even make the formatted code look better on a narrow screen mobile? something like `white-space: pre-wrap`, IIRC? maybe I should look into how to add custom CSS rules to a particular site (HN), can you do that native in firefox, or does it need a plugin?

deleted 9y ago

[deleted]