4 ms·

No ML, just JS and voronoi! https://youtube.com/watch?v=Z2ZXW2HBLPM https://youtube.com/watch?v=Z2ZXW2HBLPM

by woudsma 4y ago

apetresc 4y ago
How do Voronoi diagrams help you figure out the trajectory of a finger in a photo?
- mynegation 4y ago
  They do not, at least in this implementation they do not. If you watch the video, pointing finger position is actually preset in the data (by human analysis most likely). Voronoi (it is pronounced with “oy” not “ay” btw) is only used for proximity matching.
ta988 4y ago
The voronoi is just used to map the x,y coordinates to tiles that then map to images. Doesn't say how the images were selected and the finger coordinates mapped in the first place to generate that map.
- silentsea90 4y ago
  I assume it is done manually?
  - naillo 4y ago
    It's funny how many cool things could be created with just a few hours of manual labelling labor.
    - PebblesRox 4y ago
      Reminds me of a recent HN comment about the difference between mechanical and mathematical magic tricks. "A magician I know talks about the three kinds of magic: sleight of hand, mechanical, and mathematical. The first requires a lot of skill and practice (e.g., palming coins, manipulating cards). The second requires a lot of preparation and engineering (e.g., sawing a person in half, floating person illusions). The third relies on the nature of reality (e.g., dividing sets of cards in a known pattern that forces a result, or manipulating numbers that force an unexpected result)." https://news.ycombinator.com/item?id=31924453 https://news.ycombinator.com/item?id=31924453
- olalonde 4y ago
  I could be wrong but when this was created, pre-2012, it would have been quite hard to get a computer to annotate those pictures accurately. 2012 was the year that kick-started the deep learning revolution[0], which greatly simplified the realization of such tasks. [0] https://en.wikipedia.org/wiki/Deep_learning#Deep_learning_revolution https://en.wikipedia.org/wiki/Deep_learning#Deep_learning_re...

No ML, just JS and voronoi! https://youtube.com/watch?v=Z2ZXW2HBLPM https://youtube.com/watch?v=Z2ZXW2HBLPM

apetresc 4y ago

How do Voronoi diagrams help you figure out the trajectory of a finger in a photo?

mynegation 4y ago
They do not, at least in this implementation they do not. If you watch the video, pointing finger position is actually preset in the data (by human analysis most likely). Voronoi (it is pronounced with “oy” not “ay” btw) is only used for proximity matching.

ta988 4y ago

The voronoi is just used to map the x,y coordinates to tiles that then map to images. Doesn't say how the images were selected and the finger coordinates mapped in the first place to generate that map.

silentsea90 4y ago
I assume it is done manually?
- naillo 4y ago
  It's funny how many cool things could be created with just a few hours of manual labelling labor.
  - PebblesRox 4y ago
    Reminds me of a recent HN comment about the difference between mechanical and mathematical magic tricks. "A magician I know talks about the three kinds of magic: sleight of hand, mechanical, and mathematical. The first requires a lot of skill and practice (e.g., palming coins, manipulating cards). The second requires a lot of preparation and engineering (e.g., sawing a person in half, floating person illusions). The third relies on the nature of reality (e.g., dividing sets of cards in a known pattern that forces a result, or manipulating numbers that force an unexpected result)." https://news.ycombinator.com/item?id=31924453 https://news.ycombinator.com/item?id=31924453
olalonde 4y ago
I could be wrong but when this was created, pre-2012, it would have been quite hard to get a computer to annotate those pictures accurately. 2012 was the year that kick-started the deep learning revolution[0], which greatly simplified the realization of such tasks. [0] https://en.wikipedia.org/wiki/Deep_learning#Deep_learning_revolution https://en.wikipedia.org/wiki/Deep_learning#Deep_learning_re...