maxaopen
Attribute opening.

This function implements attribute openings and returns the filtered image. The following filters are implemented:

• "area" - prune nodes with area less than value. Equivalent to mmareaopen.
• "height" - prune nodes with height less than value. Equivalent to mmhmax.
• "volume" - prune nodes with volume less than value. Equivalent to mmvmax.
• "bbox" - prune nodes with bounding box width less than valueand bounding box height less than value2.