ee.Image.reduceConnectedComponents

Applies a reducer to all of the pixels inside of each 'object'. Pixels are considered to belong to an object if they are connected (8-way) and have the same value in the 'label' band. The label band is only used to identify the connectedness; the rest are provided as inputs to the reducer.

Usage	Returns
Image.reduceConnectedComponents(reducer, labelBand, maxSize)	Image

Argument	Type	Details
this: image	Image	The input image.
reducer	Reducer	The reducer to apply to pixels within the connected component.
labelBand	String, default: null	The name of the band to use to detect connectedness. If unspecified, the first band is used.
maxSize	Integer, default: 256	Size of the neighborhood to consider when aggregating values. Any objects larger than maxSize in either the horizontal or vertical dimension will be masked, since portions of the object might be outside of the neighborhood.