Posts Tagged ‘marketplaces’

Efficiently Scaling Up Video Annotation with Crowdsourced Marketplaces - June 7th, 2010

Moleskins and Pens

Photo courtesy of paulworthington

Congratulations to Computer Science Undergraduate Carl Vondrick, Computer Science Faculty Member Deva Ramanan and Informatics Faculty Donald J. Patterson on having their paper,
‘Efficiently Scaling Up Video Annotation with Crowdsourced Marketplaces’ accepted to ECCV-2010.

Abstract: “Accurately annotating entities in video is labor intensive and expensive. As the quantity of online video grows, traditional solutions to this task are unable to scale to meet the needs of researchers with limited budgets. Current practice provides a temporary solution by paying dedicated workers to label a fraction of the total frames and otherwise settling for linear interpolation. As budgets and scale require sparser key frames, the assumption of linearity fails and labels become inaccurate. To address this problem we have created a public framework for dividing the work of labeling video data into micro-tasks that can be completed by huge labor pools available through crowdsourced marketplaces. By extracting pixel-based features from manually labeled entities, we are able to leverage more sophisticated interpolation between keyframes to maximize performance given a budget. Finally, by validating the power of our framework on difficult, real-world data sets we demonstrate an inherent trade-off between the mix of human and cloud computing used vs. the accuracy and cost of the labeling.

Congratulations Carl, Deva and Don!

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Posted: 6/7/10 4:59 pm PDT by Comments Off
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