Many of you might have noticed problems loading challenges throughout the course of today. The problem was due to slowdown caused by the large number of traces being processed by our servers. To alleviate this problem we will be closing several challenges that were very close to complete. Mouse-V1-23 through 27, Mouse-ALM-14, and Human-FC-02 will all be taken down. New challenges will tomorrow morning April 28 at 9:00AM PDT.
We apologize for the issues.
Hi everyone,
We have just released several new challenges for you to work on over the weekend.
Mouse-V1-29
Human-TC-05
Human-TC-06
Mouse-ALM-15
Also we have recieved a request from a Seattle area news station, KOMO-TV, that is interested in interviewing any local players. If you are interested in this opportunity and live in the Seattle area please go to this forum thread.
Hi players, an incredible amount of progress has been made over the past few days. There are three challenges in particular that are very close to being complete according to our partners at AIBS. Only a few unresolved comments remain to be addressed in them. If you are looking for something to do, please consider helping on these three:
Human-TC-03
Human-TC-04
Mouse-V1-28
Since these neurons are close to completion, we will be planning to remove them this Friday at noon PDT and replace them with brand new challenges. Thanks for all your hard work!
Here is the latest round of feedback from our friendly, neighborhood neuroscientist ‘alexh’. On V1-19 you guys helped reconstruct the axon, an area the previous gold standard hadn’t touched. Nicely done! There are also some areas for improvement, so keep reading to hear what ‘alexh’ had to say about each reconstruction:
V1-18
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 more of it could have been capture if I had directed 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 (maximum intensity projection) does not show much axon because the signal-to-noise ratio is too low. This is an example of one of the harder axons to reconstruct for us, so it is not surprising that it was challenging.
V1-19
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!
Human-02
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. 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 that the signal is false is that it is very thick, very diffuse and does not connect to the main structure. I?m guessing that much of the false signal is vasculature in this case.
All in all, you've got a lot to be proud of, players! Keep up the exceptional work and we'll let you know when the next round of feedback comes rolling in.
