Recall The 8-Connected Components

WYSIWYG permits analysis by “inspection”

...

Count := 0;

repeat

Next := Im & (Im@n | Im@nw | Im@w);

Next := Next | (Im@w & Im@n & !Im);

Conn := Im@e | Im@se | Im@s;

Conn := Im & !Next & !Conn;

Count += Conn;

Im := Next;

smore := |<<Next;

until !smore;

...

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