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Great Work! #1

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JohnMBrandt opened this issue Aug 9, 2024 · 1 comment
Open

Great Work! #1

JohnMBrandt opened this issue Aug 9, 2024 · 1 comment

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@JohnMBrandt
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Hi -- I am an author of one the papers you cited in your study (https://www.sciencedirect.com/science/article/pii/S0034425723001256) which uses multi temporal cloud masking + histogram equalization to construct analysis ready data. Your approach looks very promising! I am going to try it out next week and I'll let you know if it improves our ARD :)

@JohnMBrandt
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Following up on this -- I compared Vint2 to the cloud removal algorithm that we use, which is essentially:

  • Identify cloudy areas
  • Make a cloud-free composite by histogram equalizing and gapfilling
  • Use the cloud-free composite to train a per-image gradient boosting machine to predict values for cloudy pixels

VPint2 looks really good in many areas that I tested that have low band standard deviations (e.g. dense forests), but in areas with high non-cloud values, like on farmland, the reconstruction from VPint2 seems to have really low contrast, e.g. here in Ghana:

vpint

Any ideas?

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