Challenge Results

These are all the challenges results that have been posted on Mozak.

  • Date: May 24, 2017 UTC
  • Consensus length ā€“ 72697px (84%) Gold standard length ā€“ 86425px This is also a very good reconstruction. Some short length of dendrite was missed, which is unusual. The axon that was missed was mostly deep in the slice, and because of that, quite difficult to see. There is a little false positive around the soma, but it would be easily deleted.
  • Date: May 24, 2017 UTC
  • Gold Standard: 24661px Consensus: 54694px (220%) In this case, the players traced the neuron nearly perfectly, missing only one dendrite tip, but then continued to trace a lot of false positive signal present in the image. This would be a good cell to pull examples of false signal from for training purposes. One factor that contributed is that this human tissue has a different appearance than the mouse tissue that the players are used to tracing. In this case, the quality that would indicate to a player that the signal is false is that it is very thick, very diffuse and does not connect to the main structure. Iā€™m guessing that much of the false signal is vasculature in this case.
  • Date: May 24, 2017 UTC
  • Gold Standard: 27202px Consensus: 45343px (166%) In this case, our gold standard was dendrite-only, and the dendrite portion of the consensus is perfect. The axon that the players traced looks very good, and we may end up using it to add the axon to our existing reconstruction! Thanks players! Well done!
  • Date: May 24, 2017 UTC
  • Gold Standard: 78983px Consensus: 41360px (52%) I must have pulled this one too soon. There is a lot of axon that had yet to be captured, and from past experience, I think the players would have eventually captured more of it if I had directed them with more comments. On the plus side, this consensus would have been a great starting point for us because it has almost zero false positive signal. Please note that the MIP does not show much axon because the S/N ratio is too low. This is an example of one of the harder axons to reconstruct for us, so it is not surprising that the players also found it challenging.

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