This tool performs an opening operation on an input greyscale image (`input`). An opening is a mathematical morphology operation involving a dilation (maximum filter) on an erosion (minimum filter) set. opening operations, together with the closing operation, is frequently used in the fields of computer vision and digital image processing for image noise removal. The user must specify the size of the moving window in both the x and y directions (`filterx` and `filtery`).

## See Also

closing, tophat_transform

## Function Signature

`def opening(self, raster: Raster, filter_size_x: int = 11, filter_size_y: int = 11) -> Raster: ...`

## Project Links

WbW Homepage User Manual Support WbW