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arXiv 1709.08103cs.CV
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用于鲁棒视觉位置识别的紧致环境不变码

Compact Environment-Invariant Codes for Robust Visual Place Recognition

University of Illinois Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校);Indian Institute of Technology Kanpur(印度理工学院坎普尔分校)

Unnat Jain, Vinay P. Namboodiri, Gaurav Pandey

摘要:

鲁棒的视觉位置识别(VPR)需要场景表示不受各种环境挑战的影响,例如季节变化和昼夜环境照明条件的变化。此外,一个实际的VPR系统需要紧凑的环境特征表示。为了满足这些要求,在本文中,我们建议修改现有的管道VPR系统,将监督哈希。修改后的系统学习(在监督设置)紧凑的二进制代码从图像特征描述符。这些二进制代码吸收鲁棒性的视觉变化暴露在训练阶段,从而使系统适应严重的环境变化。此外,结合监督哈希使VPR在计算上更有效,更容易在简单的硬件上实现。这是因为二进制嵌入可以在简单计算的特征上学习,并且距离计算也在二进制代码的低维汉明空间中。我们已经在几个具有挑战性的数据集上进行了实验,包括季节,光照和视角变化。我们还比较了CCAITQ和MLH这两种广泛使用的监督哈希方法,并表明这种新的流水线优于或接近最先进的深度学习VPR方法,这些方法基于从预训练的深度卷积神经网络中提取的高维特征。

英文摘要:

Robust visual place recognition (VPR) requires scene representations that are invariant to various environmental challenges such as seasonal changes and variations due to ambient lighting conditions during day and night. Moreover, a practical VPR system necessitates compact representations of environmental features. To satisfy these requirements, in this paper we suggest a modification to the existing pipeline of VPR systems to incorporate supervised hashing. The modified system learns (in a supervised setting) compact binary codes from image feature descriptors. These binary codes imbibe robustness to the visual variations exposed to it during the training phase, thereby, making the system adaptive to severe environmental changes. Also, incorporating supervised hashing makes VPR computationally more efficient and easy to implement on simple hardware. This is because binary embeddings can be learned over simple-to-compute features and the distance computation is also in the low-dimensional hamming space of binary codes. We have performed experiments on several challenging data sets covering seasonal, illumination and viewpoint variations. We also compare two widely used supervised hashing methods of CCAITQ and MLH and show that this new pipeline out-performs or closely matches the state-of-the-art deep learning VPR methods that are based on high-dimensional features extracted from pre-trained deep convolutional neural networks.

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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