arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.04652cs.CV
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阿里巴巴大规模长尾产品识别系统

Large Scale Long-tailed Product Recognition System at Alibaba

Damo Academy Alibaba Group(阿里巴巴集团达摩院)

Xiangzeng Zhou, Pan Pan, Yun Zheng, Yinghui Xu, Rong Jin

摘要:

在阿里巴巴电子商务环境下,一个实际的大规模产品识别系统存在着训练数据长尾不均衡的现象。除了阿里巴巴的产品图片外,大量与图片相关的边信息(如标题,标签)揭示了关于图片的丰富语义信息。以往的研究主要集中在从视觉角度解决长尾问题,而缺乏对边信息的利用。本文提出了一种新的基于边信息的大规模视觉识别协同训练系统(SICoT),利用图像相关边信息来解决长尾问题。在所提出的协同训练系统中,我们首先引入了一个双线性单词注意力模块,旨在构建一个语义嵌入噪声边信息。然后设计了一个视觉特征和语义嵌入的协同训练方案,以端到端的方式将知识从具有丰富训练数据的类(头类)转移到具有很少训练数据的类(尾类)。在四个具有挑战性的大规模数据集上进行了大量的实验,这些数据集的类数从一千到一百万不等,证明了所提出的SICoT系统在缓解长尾问题方面的可扩展性有效性。在阿里巴巴的视觉搜索平台拍拍淘\footnote{http://www.pailitao.com}中,实现了一个由SICoT系统驱动的大规模产品识别应用,获得了显著的UV转化率。

英文摘要:

A practical large scale product recognition system suffers from the phenomenon of long-tailed imbalanced training data under the E-commercial circumstance at Alibaba. Besides product images at Alibaba, plenty of image related side information (e.g. title, tags) reveal rich semantic information about images. Prior works mainly focus on addressing the long tail problem in visual perspective only, but lack of consideration of leveraging the side information. In this paper, we present a novel side information based large scale visual recognition co-training~(SICoT) system to deal with the long tail problem by leveraging the image related side information. In the proposed co-training system, we firstly introduce a bilinear word attention module aiming to construct a semantic embedding over the noisy side information. A visual feature and semantic embedding co-training scheme is then designed to transfer knowledge from classes with abundant training data (head classes) to classes with few training data (tail classes) in an end-to-end fashion. Extensive experiments on four challenging large scale datasets, whose numbers of classes range from one thousand to one million, demonstrate the scalable effectiveness of the proposed SICoT system in alleviating the long tail problem. In the visual search platform Pailitao\footnote{http://www.pailitao.com} at Alibaba, we settle a practical large scale product recognition application driven by the proposed SICoT system, and achieve a significant gain of unique visitor~(UV) conversion rate.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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