Color operations

Modules to perform pansharpening on an existing image.

pansharpenBrovey

Use the Weighted Brovey method to pansharpen an image.

This is expected to be used on a true-color three-band RGB image.

Props

imagePan

• Texture2D, required

A Texture2D object representing the panchromatic band of a satellite image scene.

panWeight

• Number, default 0.2

Weight of blue band. 0.2 is suitable for Landsat imagery. To perform non-weighted Brovey pansharpening, pass panWeight: 1. From here:

Particularly for Landsat 8 imagery data, we know that the pan-band does not include the full blue band, so we take a fraction of blue (optimal weight computed in this sprint) in the pan-band and use this weight to compute the sudo_pan_band, which is a weighted average of the three bands. We then compute the ratio between the pan-band and the sudo-band and adjust each of the three bands by this ratio.

Credits

pansharpenBrovey is ported from rio-pansharpen under the MIT license.