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arXiv 1812.04418cs.CV
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野生大象的自动识别

Towards Automatic Identification of Elephants in the Wild

Friedrich Schiller University Jena(耶拿弗里德里希·席勒大学)

Matthias Körschens, Björn Barz, Joachim Denzler

摘要:

从大量可能的个体中识别动物对于生物多样性监测非常重要,特别是对于收集少数特别感兴趣的个体的数据,因为在这样做之前必须首先识别这些个体。识别它们可能是一项非常耗时的任务。如果动物看起来非常相似,只有少数独特的特征,就像大象一样,这一点尤其正确。在大多数情况下,大象只会在一个地方停留很短的时间,在此期间,需要对大象进行识别,以了解是否需要收集有关它的新数据。因此,一个支持研究人员识别大象的系统将大大有助于加快这一过程。在本文中,我们提出了这样一个系统,用于识别大象在面对大量的个人,只有很少的训练图像,每个人。为此,我们结合对象部分定位,现成的CNN功能,和支持向量机分类提供现场研究的建议,可能的个人给予新的图像的大象。我们的系统的性能在一个数据集上得到了证明,该数据集包括276头大象的2078张图像,我们实现了56%的前1名测试准确率和80%的前10名准确率。为了处理数据集中存在的遮挡、不同视点和不同姿势,我们还使分析师能够向系统提供待识别的同一大象的多个图像,并聚合分类器生成的置信度值。这样,我们的系统在测试数据集上达到了74%的前1准确率和88%的前10准确率。

英文摘要:

Identifying animals from a large group of possible individuals is very important for biodiversity monitoring and especially for collecting data on a small number of particularly interesting individuals, as these have to be identified first before this can be done. Identifying them can be a very time-consuming task. This is especially true, if the animals look very similar and have only a small number of distinctive features, like elephants do. In most cases the animals stay at one place only for a short period of time during which the animal needs to be identified for knowing whether it is important to collect new data on it. For this reason, a system supporting the researchers in identifying elephants to speed up this process would be of great benefit. In this paper, we present such a system for identifying elephants in the face of a large number of individuals with only few training images per individual. For that purpose, we combine object part localization, off-the-shelf CNN features, and support vector machine classification to provide field researches with proposals of possible individuals given new images of an elephant. The performance of our system is demonstrated on a dataset comprising a total of 2078 images of 276 individual elephants, where we achieve 56% top-1 test accuracy and 80% top-10 accuracy. To deal with occlusion, varying viewpoints, and different poses present in the dataset, we furthermore enable the analysts to provide the system with multiple images of the same elephant to be identified and aggregate confidence values generated by the classifier. With that, our system achieves a top-1 accuracy of 74% and a top-10 accuracy of 88% on the held-out test dataset.

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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