// A series of images.varimg1=ee.Image(0);varimg2=ee.Image(1);varimg3=ee.Image(2);// Convert the list of images into an image collection.varcol=ee.ImageCollection.fromImages([img1,img2,img3]);print('Collection from list of images',col);// The ee.ImageCollection.fromImages function is intended to coerce the image// list to a collection when the list is an ambiguous, computed object fetched// from the properties of a server-side object. For instance, a list// of images retrieved from a ee.Feature property. Here, we set an image// list as a property of a feature, retrieve it, and convert it to// a collection. Notice that the ee.ImageCollection constructor fails to coerce// the image list to a collection, but ee.ImageCollection.fromImages does.varfeature=ee.Feature(null).set('img_list',[img1,img2,img3]);varambiguousImgList=feature.get('img_list');print('Coerced to collection',ee.ImageCollection.fromImages(ambiguousImgList));print('NOT coerced to collection',ee.ImageCollection(ambiguousImgList));// A common use case is coercing an image list from a saveAll join to a// image collection, like in this example of building a collection of mean// annual NDVI images from a MODIS collection.varmodisCol=ee.ImageCollection('MODIS/061/MOD13A2').filterDate('2017','2021').select('NDVI').map(function(img){returnimg.set('year',img.date().get('year'))});vardistinctYearCol=modisCol.distinct('year');varjoinedCol=ee.Join.saveAll('img_list').apply({primary:distinctYearCol,secondary:modisCol,condition:ee.Filter.equals({'leftField':'year','rightField':'year'})});varannualNdviMean=joinedCol.map(function(img){returnee.ImageCollection.fromImages(img.get('img_list')).mean().copyProperties(img,['year']);});print('Mean annual NDVI collection',annualNdviMean);

# A series of images.img1=ee.Image(0)img2=ee.Image(1)img3=ee.Image(2)# Convert the list of images into an image collection.col=ee.ImageCollection.fromImages([img1,img2,img3])display('Collection from list of images:',col)# The ee.ImageCollection.fromImages function is intended to coerce the image# list to a collection when the list is an ambiguous, computed object fetched# from the properties of a server-side object. For instance, a list# of images retrieved from a ee.Feature property. Here, we set an image# list as a property of a feature, retrieve it, and convert it to# a collection. Notice that the ee.ImageCollection constructor fails to coerce# the image list to a collection, but ee.ImageCollection.fromImages does.feature=ee.Feature(None).set('img_list',[img1,img2,img3])ambiguous_img_list=feature.get('img_list')display('Coerced to collection:',ee.ImageCollection.fromImages(ambiguous_img_list),)display('NOT coerced to collection:',ee.ImageCollection(ambiguous_img_list),)# A common use case is coercing an image list from a saveAll join to a# image collection, like in this example of building a collection of mean# annual NDVI images from a MODIS collection.modis_col=(ee.ImageCollection('MODIS/061/MOD13A2').filterDate('2017','2021').select('NDVI').map(lambdaimg:img.set('year',img.date().get('year'))))distinct_year_col=modis_col.distinct('year')joined_col=ee.Join.saveAll('img_list').apply(primary=distinct_year_col,secondary=modis_col,condition=ee.Filter.equals(leftField='year',rightField='year'),)annual_ndvi_mean=joined_col.map(lambdaimg:ee.ImageCollection.fromImages(img.get('img_list')).mean().copyProperties(img,['year']))display('Mean annual NDVI collection:',annual_ndvi_mean)