Sensing population distribution from satellite imagery via deep learning: Model selection, neighboring effects, and systematic biases

Xiao Huang, Di Zhu, Fan Zhang, Tao Liu, Xiao Li, Lei Zou

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The rapid development of remote sensing techniques provides rich, large-coverage, and high-temporal information of the ground, which can be coupled with the emerging deep learning approaches that enable latent features and hidden geographical patterns to be extracted. This article marks the first attempt to cross-compare performances of popular state-of-the-art deep learning models in estimating population distribution from remote sensing images, investigate the contribution of neighboring effect, and explore the potential systematic population estimation biases. We conduct an end-to-end training of four popular deep learning architectures, i.e., VGG, ResNet, Xception, and DenseNet, by establishing a mapping between Sentinel-2 image patches and their corresponding population count from the LandScan population grid. The results reveal that DenseNet outperforms the other three models, while VGG has the worst performances in all evaluating metrics under all selected neighboring scenarios. As for the neighboring effect, contradicting existing studies, our results suggest that the increase of neighboring sizes leads to reduced population estimation performance, which is found universal for all four selected models in all evaluating metrics. In addition, there exists a notable, universal bias that all selected deep learning models tend to overestimate sparsely populated image patches and underestimate densely populated image patches, regardless of neighboring sizes. The methodological, experimental, and contextual knowledge this article provides is expected to benefit a wide range of future studies that estimate population distribution via remote sensing imagery.

Original languageEnglish (US)
Article number9419720
Pages (from-to)5137-5151
Number of pages15
JournalIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Volume14
DOIs
StatePublished - 2021

Bibliographical note

Publisher Copyright:
© 2008-2012 IEEE.

Keywords

  • Deep learning
  • end-to-end architecture
  • population estimation
  • satellite imagery
  • systematic biases

Fingerprint

Dive into the research topics of 'Sensing population distribution from satellite imagery via deep learning: Model selection, neighboring effects, and systematic biases'. Together they form a unique fingerprint.

Cite this