Starting from Agisoft Metashape Professional 2.2.0, it is possible to improve the quality of orthomosaic based on higher resolution data. Pansharpening fuses a higher-resolution panchromatic band with lower-resolution bands to create sharper multispectral orthomosaics.
If you have, for example, a panchromatic channel in your project, then after building the orthomosaic you can improve the resolution. You can find the workflow for building orthomosaic in our articles:
Aerial data processing (with GCPs) - Orthomosaic&DEM generation
Orthomosaic & DEM generation (without GCPs)
It is not recommended to use pansharpening if then it is necessary to calculate vegetation indices (for example, NDVI), since the results will be unreliable. The original values in pixels will be changed and will not give a completely reliable result after calculating the indexes.
There should be 2 orthomosaics in the project that will be used for pansharpening. In the project example there are two orthomosaics generated based on satellite image data (SuperView-1): one built based on a panchromatic channel and another - based on multispectral data.
To perform sharpening use the following option after orthomosaics are generated in the project: select Tools > Orthomosaic > Sharpen Orthomosaic... Then specify the following parameters in the processing dialog box:
- High resolution orthomosaic - select the data on the basis of which the orthomosaic improvement will be performed, i.e. orthomosaic with a more detailed resolution and the channel on the basis of which the sharping will be performed.
- Low resolution orthomosaic - specify the orthomosaic with a lower resolution to which the sharping will be applied.
- Clip target area to high resolution data - the parameter allows to crop the resulting orthomosaic to the area where the orthomosaic with a higher resolution was available.
Click OK button to start the processing process. New orthomosaic asset with the sharpened bands will appear in the Workspace pane and the Sharpened tag will be added to its label:
Comparison of the result of the initial orthomosaic and after applied pansharpening: