Fraternali concertation june25bruxelles
Post on 18-Jan-2015
221 Views
Preview:
DESCRIPTION
Transcript
Content exploitation: men and machines
DG Connect -Unit G1 – Converging Media and ContentBruxelles, June 16 2014
Piero Fraternali, Politecnico di Milanopiero.fraternali@polimi.it
What content?
Corporate content• Google is indexing the earth
User generated content• Video IP traffic will be 73% of all
Internet traffic by 2017. The sum of all forms of video (TV, VoD, Internet, and P2P) ~ 80-90% [Cisco, 2013]
• 250+ billion photos uploaded and 350+ million photos uploaded every day [Facebook, 2013]
• “Big data” is (mostly) visual data
How to exploit UGC
So many applications But .. so much garbage
The human computation trust circle
people
data
Passive crowdsourcingActive crowdsourcingCrowdsourcing optimizationIncentivesTrust computingAdversarial computing
Provenance trackingTampering detectionUncertainty modeling and reductionSemantic enrichment
algorithmsReliabilityOptimizationPredictive modelingQuality guarantee
FOCUS HERE
Example: incentives
• Problem: identify 10 balloons anchored in 10 undisclosed locations in the US, $ 40,000 prize to the winner
• Solution in less than 9 hours
• Recursive incentive mechanism (Nash equilibrium)
Another (different) incentive scheme
• Complex content (3d with constraints)
• Computationally intractable
• Solved with Tetris-like game
• Massive voluntary online collaboration, community quality monitoring
How to compute people Influence & Trust
How to fight adversariesGoal• Obtain quality content with
minimum amount of human and computational resources
• Algorithm can fail• But humans can cheat!
Object detection example
In summary
• Exploiting content requires .. good content• Computers and humans can cooperate in new ways
– More than algorithm optimization– More than crowdsourcing
• Old problem, but at a new scale– "On two occasions I have been asked,
"Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?"... I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question."
– Charles Babbage, Passages from the Life of a Philosopher (1864)
top related