Texture-sensitive superpixeling and adaptive thresholding for effective segmentation of sea ice floes in high-resolution optical images

Yanmei Chai, Jinchang Ren, Byongjun Hwang, Jian Wang, Dan Fan, Yijun Yan, Shiwei Zhu

Research output: Contribution to journalArticlepeer-review

Abstract

Efficient and accurate segmentation of sea ice floes from high-resolution optical (HRO) remote sensing images is crucial for understanding of sea ice evolutions and climate changes, especially in coping with the large data volume. Existing methods suffer from noise interference and mixture of water and ice caused high segmentation error and less robustness. In this study, we propose a novel sea ice floe segmentation algorithm from HRO images based on texture-sensitive superpixeling and twostage thresholding. First, sparse components are extracted from the HRO images using the Robust Principal Component Analysis (RPCA), and noise is removed by the bilateral filter. The enhanced image is obtained by combining the low-rank matrix and the sparse components. Second, a texture-sensitive Simple Linear Iterative Clustering (SLIC) superpixel algorithm is introduced for pre-segmentation of the enhanced HRO image. Third, a learning based adaptive thresholding in the two-stages is employed to generate the refined segmentation from the derived superpixels blocks. The efficacy of the proposed method is validated on two HRO images using visual assessment, quantitative evaluation (with seven metrics) and histogram comparison. The superior performance of the proposed method has demonstrated its efficacy for sea ice floe segmentation.
Original languageEnglish
Pages (from-to)577-586
Number of pages10
Journal IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Volume14
Early online date25 Nov 2020
DOIs
Publication statusE-pub ahead of print - 25 Nov 2020

Keywords

  • sea ice floe segmentation
  • high-resolution optical image
  • low-rank sparse representation
  • texture-sensitive superpixeling
  • adaptive two-stage thresholding

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