COMPUTER VISION

ML APPLICATIONS

Are Labels Necessary for Neural Architecture Search?

July 17, 2020

Abstract

Existing neural network architectures in computer vision --- whether designed by humans or by machines --- were typically found using both images and their associated labels. In this paper, we ask the question: can we find high-quality neural architectures using only images, but no human-annotated labels? To answer this question, we first define a new setup called Unsupervised Neural Architecture Search (UnNAS). We then conduct two sets of experiments. In sample-based experiments, we train a large number (500) of diverse architectures with either supervised or unsupervised objectives, and found that the architecture rankings produced with and without labels are highly correlated. In search-based experiments, we run a well-established NAS algorithm (DARTS) using various unsupervised objectives, and report that the architectures searched without labels can be competitive to their counterparts searched with labels. Together, these results reveal the potentially surprising finding that labels are not necessary, and the image statistics alone may be sufficient to identify good neural architectures.

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AUTHORS

Written by

Saining Xie

Kaiming He

Piotr Dollar

Ross Girshick

Alan Yuille

Chenxi Liu

Publisher

ECCV

Research Topics

Computer Vision

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