Earth Engine is introducingnoncommercial quota tiersto safeguard shared compute resources and ensure reliable performance for everyone. All noncommercial projects will need to select a quota tier byApril 27, 2026or will use the Community Tier by default. Tier quotas will take effect for all projects (regardless of tier selection date) onApril 27, 2026.Learn more.
ee.Image.spectralDilationStay organized with collectionsSave and categorize content based on your preferences.
Computes the spectral/spatial dilation of an image by computing the spectral distance of each pixel under a structuring kernel from the centroid of all pixels under the kernel and taking the most distant result. See 'Spatial/spectral endmember extraction by multidimensional morphological operations.' IEEE transactions on geoscience and remote sensing 40.9 (2002): 2025-2041.
Usage
Returns
Image.spectralDilation(metric,kernel,useCentroid)
Image
Argument
Type
Details
this:image
Image
The input image.
metric
String, default: "sam"
The spectral distance metric to use. One of 'sam' (spectral angle mapper), 'sid' (spectral information divergence), 'sed' (squared Euclidean distance), or 'emd' (earth movers distance).
kernel
Kernel, default: null
Connectedness kernel. Defaults to a square of radius 1 (8-way connected).
useCentroid
Boolean, default: false
If true, distances are computed from the mean of all pixels under the kernel instead of the kernel's center pixel.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-07-13 UTC."],[],[]]
