Image fusion

Create a superimposed layer (reprojected image)

1. Add the panchromatic band 8 (15m GSD) and multispectral bands (B1 – B7, 30m GSD) into QGIS using the ‘add raster layer’ function.
2. I n the Processing Toolbox, search for Superimpose sensor.
3. In the reference input, select the band 08 file.
4. Select the multispectral bands as the image to reproject.
5. Specify the directory to save the output file and click on the ‘Run-button’.

Create a pan-sharpened layer

1. Search for Pansharpening (Bayes) algorithm in the Processing Toolbox.
2. Select Band 08 as the Input PAN Image.
3. Select the Superimposed layer (Reprojected image) as the InputXS Image.
4. Specify the directory to save the output file and click on the ‘Run-button’.

Compare the fused image with the original image

In QGIS viewer by using the “Map Swipe Tool” plugin.