2020
DOI: 10.1007/s00338-020-02005-6
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A global coral reef probability map generated using convolutional neural networks

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Cited by 62 publications
(48 citation statements)
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“…Otsu's method (Otsu, 1979) was applied on SPM-transformed S2 L2A blue (SPM B2), green (SPM B3), red (SPM B4), red edge bands (SPM B5) (Nechad et al, 2010), normalized red-blue band difference [ND(B4/B2)] (Li et al, 2020), and normalized red-green band difference [ND(B4/B3)]. This method works for single-band images with bimodal pixel distribution by defining a minimum threshold value that separates two classes.…”
Section: Otsu's Methods For Bimodal Thresholdingmentioning
confidence: 99%
“…Otsu's method (Otsu, 1979) was applied on SPM-transformed S2 L2A blue (SPM B2), green (SPM B3), red (SPM B4), red edge bands (SPM B5) (Nechad et al, 2010), normalized red-blue band difference [ND(B4/B2)] (Li et al, 2020), and normalized red-green band difference [ND(B4/B3)]. This method works for single-band images with bimodal pixel distribution by defining a minimum threshold value that separates two classes.…”
Section: Otsu's Methods For Bimodal Thresholdingmentioning
confidence: 99%
“…By compositing several classifications of the same year, we can gain a more nuanced picture of seagrass extent by attaching probability estimates to each pixel. Previous studies found temporal composite approaches useful for mapping of terrestrial vegetation [44,45], as well as coral reefs and other marine benthic habitats [43]. A drawback of the approach presented herein is that both classification error and seasonal growth dynamics reduce seagrass detection probability.…”
Section: Temporal Composite Of Satellite Imagery For Eelgrass Probability Mappingmentioning
confidence: 96%
“…This and the typically turbid waters at San Quintín require imagery taken at low tidal stage, however, no such imagery was available for summer, because of regular cloud cover. Large-scale benthic habitat mapping efforts that rely on Planet imagery have used a cloud-free satellite scene composite [43], but our attempt of seasonal mapping required imagery to be acquired in close temporal proximity to field sampling, narrowing the choice of satellite scenes. Tidal stage, cloud cover, and imagery acquisition timing are well described constrains for benthic habitat mapping [12] and these are not fully alleviated by daily satellite revisits.…”
Section: Planetscope-daily Revisits But Mixed Image Qualitymentioning
confidence: 99%
“…Heat stress, disease outbreaks, sedimentation, and increased storms have resulted in dramatic loss of warm-water coral reefs in increasingly widespread locations (Häussermann & Försterra 2014 , Hughes et al 2018 , GBRMPA 2019 , Li et al 2020 ). Poleward expansion of light-dependent coral species has been limited (with few exceptions; e.g.…”
Section: Alternative Future Narrative 1: Business-as-usual 2030mentioning
confidence: 99%