arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.12151cs.CV
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通过学习视觉表征的花园位置识别:数据集和基准分析

Place recognition in gardens by learning visual representations: data set and benchmark analysis

Bernoulli Institute for Mathematics, Computer Science and Artificial Intelligence, University of Groningen(格罗宁根大学伯努利数学、计算机科学与人工智能研究所)

Maria Leyva-Vallina, Nicola Strisciuglio, Nicolai Petkov

摘要:

视觉位置识别是摄像机定位和环路闭合检测系统的重要组成部分。它只涉及基于视觉线索的先前访问过的地方的识别。虽然这是一个广泛研究的问题,室内和城市环境,最近使用的机器人自动化的农业和园艺任务已经产生了新的问题,由于具有挑战性的外观花园般的环境。花园场景主要包含绿色,以及重复的图案和纹理。由于缺乏在花园和自然环境中记录的可用数据,使得视觉定位算法的改进变得困难。在本文中,我们提出了一个扩展版本的TB-Places数据集,这是专为测试算法的视觉识别。它包含在不同季节的真实花园中记录的地面真实相机姿势的图像,具有不同的光照条件。我们为所有可能的图像对构建并发布了一个基础事实,表明它们是否描绘了同一个地方。我们提出了一个基准分析的结果,基于卷积神经网络的整体图像描述和地方识别的方法。我们训练现有网络(即ResNet,DenseNet和VGG NetVLAD)作为具有对比损失函数的双向架构的骨干。我们得到的结果表明,学习花园定制的表示有助于提高性能,虽然泛化能力是有限的。

英文摘要:

Visual place recognition is an important component of systems for camera localization and loop closure detection. It concerns the recognition of a previously visited place based on visual cues only. Although it is a widely studied problem for indoor and urban environments, the recent use of robots for automation of agricultural and gardening tasks has created new problems, due to the challenging appearance of garden-like environments. Garden scenes predominantly contain green colors, as well as repetitive patterns and textures. The lack of available data recorded in gardens and natural environments makes the improvement of visual localization algorithms difficult. In this paper we propose an extended version of the TB-Places data set, which is designed for testing algorithms for visual place recognition. It contains images with ground truth camera pose recorded in real gardens in different seasons, with varying light conditions. We constructed and released a ground truth for all possible pairs of images, indicating whether they depict the same place or not. We present the results of a benchmark analysis of methods based on convolutional neural networks for holistic image description and place recognition. We train existing networks (i.e. ResNet, DenseNet and VGG NetVLAD) as backbone of a two-way architecture with a contrastive loss function. The results that we obtained demonstrate that learning garden-tailored representations contribute to an improvement of performance, although the generalization capabilities are limited.

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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