I'm trying to do filter images using Majority filter in ArcGIS. My input images is a float point raster image in .img format. There is an error saying "Invalid parameters". What does it mean?
Following up on the Comment by @whuber, the Majority Filter (Spatial Analyst) documentation says (with my bolding):
The input raster to be filtered based on the the majority of contiguous neighboring cells.
It must be of integer type.
Majority filter is mostly used as a tool in post processing stage to reduce the salt and pepper effect caused by isolated pixels in a thematic map. So it should be used on categorial raster as a zonal analysis. This means that even for a satellite image with integer DN values, it's not meaningful to use the majority filter.