Pan sharpening techniques in SNAP

[jessicatay]

Hi everyone. I am trying to calculate the NDWI which uses Band 8 and 11. However, Band 8 is at 10m resolution while Band 11 is at 20m.

Is there any Pan sharpening methods that I can perform in SNAP? if so, what are they?

Right now, I just did a resampling of all the Bands to 10m and ran the analysis for NDWI. Although it worked, I just want to clarify if it is the best or correct way to do it? Or do I need to do pan sharpening of Band 11?

Thanks for any available help on this!

[ABraun]

Pan sharpening is available in the OTB adapter - please see here:

Beta OTB Adapters available

A Beta version of Orfeo Toolbox SNAP Adapters is available for tests. These adapters allow to launch from SNAP some of the main OTB tools (4 Segmentation tools, 3 Pan-Sharpening tools, SFS Texture Extraction and Multivariate Alteration Detector) To install them is first required to set-up a new update center. From SNAP, go to tools/plugins then click on the Settings tab and press the "Add" Button to add a new update center. Put the name of your choice and http://step.esa.int/updatecenter/exp…

But for the calculation of a ratio resampling should be the better choice. With pan sharpening you risk imputing patterns from your high resolution image into the other and thus distort the actual band ratio.

[nicolas.brodu]

You may perhaps try this new tool.
I’d be particularly interested in feedback how this compares with the other pansharp techniques mentionned here.
See my other post on this topic

[mengdahl]

This is certainly interesting, it might be worthwhile to port this to SNAP in Java, provided that the theoretical basis is solid.