| http://www.w3.org/ns/prov#value | - While PPS pixel cell 13 (previously described with reference to FIG. 2B) is shown in the FIG. 5 embodiment and the specific circuit embodiment of FIG. 6, one skilled in the art would recognize that various kinds of pixels can be employed in the invention, for example, the alternative PPS pixel embodiments shown in FIGS. 8A-C.
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