Edge Detection Using Cellular Automata - Cellular Automata in Image Processing and Geometry - page 96

Fig. 5.12 Binary edge maps (left) post-processed to link fragmented edges by running five
iterations of the rules described in section 5.4.1 (right); inserted edgels are coloured red. The
bottom row shows two close ups from the second example.

inverted pepper. The logical AND operation is applied to the two edge maps which
effectively eliminates both salt and pepper (figure 5.8d). 2

2

There can also be a single pixel translation between the edge responses of the two outputs,
and so better results were achieved by translating one of the images by {− 1 , 0 , 1 } in X and
Y before the logical AND operation. The outputs were then combined using a logical OR
operation.