Structured Forests for Fast Edge Detection

From Edges to ObjectsPiotr Dollr and Larry Zitnick

1structured edge prediction [Dollr & Zitnick, ICCV13, arXiv14] from edges to objects [Zitnick & Dollr, ECCV14]

outline2what defines an edge?BrightnessColorTextureParallelismContinuitySymmetry

Let the data speak.3upgrading the output space{ 0, 1 }{ }

bits12568yearCVPR06ICCV13CVPR134random forests

5structured forests

6structured prediction

7pixel prediction

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sharpeningsharpened prediction

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structured sharpened pixel original imageSH = sharpen MS = multiscalegPb ODS=.73 gPb ODS=.73 FPS 1/240 Hz

2.5HzSHSH+MSODS = 0.73ODS = 0.75ODS = 0.7430Hz12.5Hz12

structured edge prediction [Dollr & Zitnick, ICCV13, arXiv14] from edges to objects [Zitnick & Dollr, ECCV14]

outline15

sliding window detectionrestrictive!16segmentation for detection

hard!17object proposals

Random. Prims - 2013Selective Search - 2011 CPMC - 2010Ojectness - 201018object proposals from ?sliding windows? segments? superpixels?

SLIC - 2012SEEDS - 201219

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from edges to objects

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fast

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thanks!source code available online28