Image analysis – Pattern recognition – Feature extraction
Patent
1997-01-07
2000-02-01
Boudreau, Leo H.
Image analysis
Pattern recognition
Feature extraction
382201, 382209, 382282, G06K 946, G06K 966, G06K 950, G06K 962
Patent
active
060212195
ABSTRACT:
A method and apparatus for controlling the operation of a video system such as a video game system through recognition of a visual pattern, or key. For example, the presence and identity of the key may enable and select certain features of the video system. The key may suitably consist of a locator mark and a selector mark, the presence of the locator mark identifying the presence of a key, and the selector mark identifying the particular key present. A key recognition system detects the presence of the locator mark and identifies the selector mark. The locator mark is preferably of a distinctive color, readily distinguishable from background objects. The selector mark may be chosen from a limited set of colors, and the color of the selector mark may then be identified to identify the key being used. In another aspect, the locator mark is located in a particular position within the selector mark and is then used by the key detector to scale a rectangle about the selector mark. The selector mark is reduced by processing within the key detector to a reduced invariant image characterization. This reduced invariant image characterization is then compared against image data characterizations stored in a dictionary to identify the particular selector mark, and thus particular key.
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patent: 5103489 (1992-04-01), Miette
patent: 5237628 (1993-08-01), Levitan
patent: 5642442 (1997-06-01), Morton et al.
patent: 5729630 (1998-03-01), Ikeda
patent: 5751847 (1998-05-01), Wuyts
Andersson Russell L.
Singer Howard M.
Boudreau Leo H.
Lucent Technologies - Inc.
Novik Dmitry A.
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