relative attributes

Relative Attributes

Speaker DengLei

At I-VisionGroup

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Devi Parikh & Kristen Grauman

ICCV 2011 Marr Prize

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Publication—Devi Parikh

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… last 3 years: ICCV 3(one only her) ECCV 1 CVPR 9 IJCV 1 NIPS 1

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Outline

Introduction

Algorithms

Experiments

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Introduction—Backgrounds

Visual attributes Benefit various recognition tasks Restrict on categorical label Binaries are unnatural

Motivation How to describe middle image Relative description —  one image’s attribute strength with

respect to others E.g. less natural than left, more nature than right Richer mode of communication Allow more detailed human supervision (maybe higher

recognition accuracy) More informative descriptions of novels

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Proposal

Steps Training – learn ranking function per attribute Testing – predict the relative strength per attribute on novel

image

New Tasks Build generative model over joint space of ranking output Zero-shot learning relates unseen to seen

E.g. 'bears are furrier than giraffes‘ Enable richer textual description for new images

More precise Tested on faces and natural scenes compared with binaries

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Outline

Introduction

Algorithms

Experiments

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Algorithms— learning relative attrs

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wide-margin {ranking VS binary} classifier

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Novel zero-shot learning

Setup N total categories: S seen, U unseen (no images available) S: described relative to each other via attrs (no need all pairs) U: described relative to seen in (subset of ) attrs

Gaussian Test by Max-likehood

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Auto gen relative textual desc of images

Img -> Img Img -> Class More info

than bin

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Outline

Introduction

Algorithms

Experiments

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Experiments

Setup Outdoor Scene Recognition (OSR)

I: 2668, C: 8, Coast, forest, highway, inside-city,

mountain, open-country, street, tall-building Gist

Public Figures Face (PubFig) I: 772, C: 8 Alex, Clive, Hugh, Jared, Miley, Scarlett, Viggo, Zac Concatenated gist and color feature

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Database — relative attrs

Marked

By a

colleague

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zero-shot learning

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Conclusion

Idea to learn relative visual attrs. Two new tasks

Zero-shot learning Img description Based on relative description

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Thanks