GEE错误——Image.reduceRegion: Parameter ‘image‘ is required.

错误：

FeatureCollection (Error)

Error in map(ID=00000000000000000008): Image.reduceRegion: Parameter 'image' is required.

函数：

reduceRegion(reducer, geometry, scale, crs, crsTransform, bestEffort, maxPixels, tileScale)

Apply a reducer to all the pixels in a specific region.

Either the reducer must have the same number of inputs as the input image has bands, or it must have a single input and will be repeated for each band.

Returns a dictionary of the reducer's outputs.

Arguments:

this:image (Image):

The image to reduce.

reducer (Reducer):

The red