| http://www.w3.org/ns/prov#value | - Patent US6128046 - Key signal generating apparatus and picture synthesis apparatus, and key ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsIn this invention, when the portion from which a key signal ?? is to be generated of picture is caused to be foreground F, the portion except for the above is caused to be background B, and pixel
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