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<http://webisa.webdatacommons.org/1093339>	<http://www.w3.org/ns/prov#value>	", subtraction{(applied in cameras using an electronic image sensor H04N 5/23229 , H04N 5/235)}Definition statement This subgroup covers: Image averaging (add the Indexing Code G06T 2207/20216) Image fusion, image merging: (add the Indexing Code G06T 2207/20221) Image subtraction: add the Indexing Code G06T 2207/20224 Enhanced final image by combining multiple, e.g. degraded, images, while maintain" .