Computes the per-pixel spectral distance between two images. If the images are array based then only the first band of each image is used; otherwise all bands are involved in the distance computation. The two images are therefore expected to contain the same number of bands or have the same 1-dimensional array length.
| Usage | Returns |
|---|---|
Image.spectralDistance(image2, metric) | Image |
| Argument | Type | Details |
|---|---|---|
this: image1 | Image | The first image. |
image2 | Image | The second 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). |