Smoothing Filters
The smoothing filters work by passing a matrix which contains the filter over your raster dataset. The filter type, filter shape and the filter size can all be specified.
Filter Type
This can be either 2D median or 2D mean. Note that your choice of filter may affect the number of filter shape options you have.
Filter Shape
- Box window - this is a regular square matrix with constant values applied to your dataset.
- Disk window - this applies a disk of constant values to your dataset
- Gaussian Window - this applies a Gaussian shaped filter to your dataset. This option is only present for the 2D mean filter type.
Filter Size
The options here are dependant on the option chosen in filter shape. They are as follows:
- X and Y for the Box window - this is the number of rows and columns which will make up the box window
- Radius in samples for the Disk window - this creates a disk of the specified radius. The disk will have 2*radius rows and columns
- Standard Deviation for the Gaussian Window - this creates the Gaussian box window where the values have the standard deviation specified.