arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.05137cs.CVcs.AI
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考虑现实世界的对象分类

Contemplating real-world object classification

HCL America(HCL美国公司)

Ali Borji

摘要:

深度对象识别模型在ImageNet等基准数据集上非常成功。它们对数据集中自然和合成变异引起的分布偏移的准确性和稳健性如何?之前对这个问题的研究主要集中在ImageNet的变化(例如,ImageNetV2、ImageNet-A)。为了避免这些研究中潜在的遗传偏见,我们采取了不同的方法。具体来说,我们重新分析的ObjectNet数据集最近提出的Barbu等人。包含对象在日常生活中的情况。他们在这个数据集上显示了最先进的对象识别模型的性能急剧下降。由于他们的结果对深度模型泛化能力的重要性和影响,我们再次审视他们的分析。我们发现,将深度模型应用于孤立的对象,而不是像原始论文中那样应用于整个场景,可以提高大约20-30%的性能。相对于Barbu等人报告的数字,在没有任何测试时间数据增强的情况下,恢复了大约10-15%的性能损失。然而,尽管有了这些收获,我们得出结论,深度模型在ObjectNet数据集上仍然受到严重影响。我们还研究了模型对合成图像扰动的鲁棒性,例如几何变换(例如,缩放、旋转、平移),自然图像失真(例如,脉冲噪声、模糊)以及对抗攻击(例如,FGSM和PGD-5)。我们的结果表明,尽可能多地限制对象区域(即,从整个图像到限界框再到分割掩模)导致准确性和鲁棒性的一致改进。

英文摘要:

Deep object recognition models have been very successful over benchmark datasets such as ImageNet. How accurate and robust are they to distribution shifts arising from natural and synthetic variations in datasets? Prior research on this problem has primarily focused on ImageNet variations (e.g., ImageNetV2, ImageNet-A). To avoid potential inherited biases in these studies, we take a different approach. Specifically, we reanalyze the ObjectNet dataset recently proposed by Barbu et al. containing objects in daily life situations. They showed a dramatic performance drop of the state of the art object recognition models on this dataset. Due to the importance and implications of their results regarding the generalization ability of deep models, we take a second look at their analysis. We find that applying deep models to the isolated objects, rather than the entire scene as is done in the original paper, results in around 20-30% performance improvement. Relative to the numbers reported in Barbu et al., around 10-15% of the performance loss is recovered, without any test time data augmentation. Despite this gain, however, we conclude that deep models still suffer drastically on the ObjectNet dataset. We also investigate the robustness of models against synthetic image perturbations such as geometric transformations (e.g., scale, rotation, translation), natural image distortions (e.g., impulse noise, blur) as well as adversarial attacks (e.g., FGSM and PGD-5). Our results indicate that limiting the object area as much as possible (i.e., from the entire image to the bounding box to the segmentation mask) leads to consistent improvement in accuracy and robustness.

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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