ee.ImageCollection.distinct

Removes duplicates from a collection. Note that duplicates are determined using a strong hash over the serialized form of the selected properties.
UsageReturns
ImageCollection.distinct(properties)FeatureCollection
ArgumentTypeDetails
this: collectionFeatureCollectionThe input collection from which objects will be selected.
propertiesObjectA property name or a list of property names to use for comparison. The '.geo' property can be included to compare object geometries.