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The object-based method described here helps uniquely label the hotspot in image objects.

// Uniquely label the hotspot image objects.
var objectId = hotspots.connectedComponents({
  connectedness: ee.Kernel.plus(1),
  maxSize: 128
});

If each object now has a unique ID, my question is how to print out all the labels and count the number of unique IDs that have been identified?

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reduceRegion with a countDistinct reducer.

var count = objectId.reduceRegion({reducer: ee.Reducer.countDistinct(), ...})
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  • Thank you! @Noel Gorelick Jul 9 '21 at 23:47

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