Thanks for the answer, Jake!
I know about that section, but my problem is a little bit different. While I can insert raster functions to the separate rasters in the Footprint (say NDVI), I cannot create a general function (at the Mosaic Dataset level) that takes as input same rasters from the mosaic dataset and do an arithmetic operation for example.
Below I attached screenshots of the mosaic, and the Arithmetic Function.
These are the rasters inside the mosaic dataset. They are a separate 1-Band Mosaic Datasets of different years. (Crated with: Creating a mosaic dataset containing raster data from multiple dates—Help | ArcGIS for Desktop )
On them, I need to apply the difference "Raster_Change_Detection_1_1" / "Raster_Change_Detection_2_2" on-the-fly.
If i go to the Mosaic Functions tab, I cannot choose those two rasters.
Is there a way to do this? Suppose there is a way with raster functions, I can further use arcpy to automatically do this analysis.
Thanks again!
Alin