The features, for example, include colors, grey scale levels, cell shape, {HEAD ~ patterns} within a cell or {TAIL ~ any grouping} discernable by an area array camera or similar device 
within
The features , for example , include colors , grey scale levels , cell shape , { HEAD ~ patterns } within a cell or { TAIL ~ any grouping } discernable by an area array camera or similar device
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH