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n4google.
isaphttp://webisa.webdatacommons.org/prov/
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provhttp://www.w3.org/ns/prov#
xsdhhttp://www.w3.org/2001/XMLSchema#
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isa:438427401
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In FIGS. 9A to 9D, a0 is a starting changed pixel on the encoding line, and a1 is a first changed pixel on the right side of a0 on the encoding line. a2 is a changed pixel next to a1 on the encoding line, and b1 is a first changed pixel on the reference line on the right side of a0 and having a color opposite to that of a0. b2 is a changed pixel next to b1 on the reference line
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n4:fr
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