Meshroom - What does FeatureExtraction dots color mean in Image Viewer?

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I couldn't find any info in the docs. What does each color mean when I check out the features extracted from an image in Meshroom 2021.1?

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After some testing I deducted what they are:

  • Blue: Features generated in the node "FeatureExtraction".
  • Orange: Features Matched with other pictures. Generated in "MatchesFeatures" node.
  • Red: Features used by StructureForMotion (aka, used in reconstruction).