US PATENT SUBCLASS 382 / 197
.~.~.~ Directional codes and vectors (e.g., Freeman chains, compasslike codes)

Current as of: June, 1999
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382 /   HD   IMAGE ANALYSIS

181  DF  PATTERN RECOGNITION {8}
190  DF  .~ Feature extraction {5}
195  DF  .~.~ Local or regional features {7}
197.~.~.~ Directional codes and vectors (e.g., Freeman chains, compasslike codes) {1}
198  DF  .~.~.~.~> Extracted from alphanumeric characters

DEFINITION

Classification: 382/197

Directional codes and vectors (e.g., Freeman chains, compasslike codes):

(under subclass 195) Subject matter wherein the outline of a pattern* is encoded as a connected sequence or chain of feature signals representing headings or points of the compass.