  A recurring focus of the deep learning community is towards reducing the
labeling effort. Data gathering and annotation using a search engine is a
simple alternative to generating a fully human-annotated and human-gathered
dataset. Although web crawling is very time efficient, some of the retrieved
images are unavoidably noisy, i.e. incorrectly labeled. Designing robust
algorithms for training on noisy data gathered from the web is an important
research perspective that would render the building of datasets easier. In this
paper we conduct a study to understand the type of label noise to expect when
building a dataset using a search engine. We review the current limitations of
state-of-the-art methods for dealing with noisy labels for image classification
tasks in the case of web noise distribution. We propose a simple solution to
bridge the gap with a fully clean dataset using Dynamic Softening of
Out-of-distribution Samples (DSOS), which we design on corrupted versions of
the CIFAR-100 dataset, and compare against state-of-the-art algorithms on the
web noise perturbated MiniImageNet and Stanford datasets and on real label
noise datasets: WebVision 1.0 and Clothing1M. Our work is fully reproducible
https://git.io/JKGcj

Computer Vision and Pattern Recognition