Logo detection by edge matching
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United States of America Patent
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Jan 3, 2017
Grant Date -
Nov 19, 2015
app pub date -
May 12, 2015
filing date -
May 13, 2014
priority date (Note) -
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Abstract
To detect the presence of a logo in a search image, the positions of edges, in an image of the logo and in the search image, are represented by ratios of distances between the respective edge and a plurality of preceding edges. This can be carried out both horizontally and vertically. A sequence of edges at a selected position in the logo image is then compared with sequences of edges from a plurality of positions in the search image, and the position of the logo in the search image is determined from the position of a match between the respective sequences of edges.
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