| http://www.w3.org/ns/prov#value | - rcles, sectors and any other shapes, said pattern on said each pixel is encoding an address of said pixel as at least one of a binary code, a decimal code, a bar code and other code patterns that unambiguously defines a position of said pixel in said reference plane, and said address reading means comprise at least one of single light sensors and sensor arrays operable to interpret address informa
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