Semi-Supervised Change Detection of Small Water Bodies Using Rgb and Multispectral Images in Peruvian Rainforests

Kangning CUI, Seda CAMALAN, Ruoning LI, Victor Paul PAUCA, Sarra ALQAHTANI, Robert PLEMMONS, Miles SILMAN, Evan Nylen DETHIER, David LUTZ, Raymond CHAN*

*Corresponding author for this work

Research output: Book Chapters | Papers in Conference ProceedingsConference paper (refereed)Researchpeer-review

4 Citations (Scopus)

Abstract

Artisanal and Small-scale Gold Mining (ASGM) is an important source of income for many households, but it can have large social and environmental effects, especially in rainforests of developing countries. The Sentinel-2 satellites collect multispectral images that can be used for the purpose of detecting changes in water extent and quality which indicates the locations of mining sites. This work focuses on the recognition of ASGM activities in Peruvian Amazon rainforests. We tested several semi-supervised classifiers based on Support Vector Machines (SVMs) to detect the changes of water bodies from 2019 to 2021 in the Madre de Dios region, which is one of the global hotspots of ASGM activities. Experiments show that SVM-based models can achieve reasonable performance for both RGB (using Cohen's κ 0.49) and 6-channel images (using Cohen's κ 0.71) with very limited annotations. The efficacy of incorporating Lab color space for change detection is analyzed as well.

Original languageEnglish
Title of host publication2022 12th Workshop on Hyperspectral Imaging and Signal Processing: Evolution in Remote Sensing, WHISPERS 2022
PublisherIEEE
Number of pages5
ISBN (Electronic)9781665470698
DOIs
Publication statusPublished - 2022
Externally publishedYes
Event12th Workshop on Hyperspectral Imaging and Signal Processing: Evolution in Remote Sensing, WHISPERS 2022 - Rome, Italy
Duration: 13 Sept 202216 Sept 2022

Publication series

NameWorkshop on Hyperspectral Image and Signal Processing, Evolution in Remote Sensing
Volume2022-September
ISSN (Print)2158-6276

Conference

Conference12th Workshop on Hyperspectral Imaging and Signal Processing: Evolution in Remote Sensing, WHISPERS 2022
Country/TerritoryItaly
CityRome
Period13/09/2216/09/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE.

Keywords

  • artisanal gold mining
  • change detection
  • RGB & multispectral images
  • semi-manual labeling
  • semi-supervised machine learning.

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