OUTBND4 filter

Outer boundary of 4-connected pixels. The OUTBND4 filter is a standard binary filter which works in a 3x3 environment.

When a true center pixel has one or more horizontal or vertical false neighbours, the true center pixel is assigned 0 and the false neighbours are assigned 1.

Using this filter results in an 8-connected outline around groups of false pixels which were true in the input map.

See also:

Example of binary filters

Filter types : binary filters