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