mapbox / mapbox/rio-cloudmask

Error in brightness test

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Dominant language
Python
Stars
55
Forks
12
PR merge metrics
No merged PRs in 30d

Description

Hello,

I found a small typo in the algorithm.

According to the paper, it is band 5 that is used for brightness test, i.e. swir1 and not nir as coded in rio-cloudmask. This messes a lot of things over water.

Many thanks for the clean code style!
Thomas

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Search the repository for the brightness test and the use of nir, then compare that logic with the referenced paper. Update the test to use band 5, swir1, and verify that the brightness calculation behaves correctly over water.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
computer-vision
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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