Granted Patent
Utility
US 6,665,439 · App. 09/545,580
Image recognition method and apparatus utilizing edge detection based on magnitudes of color vectors expressing color attributes of respective pixels of color image
Inventor:
Eiji Takahashi
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Apr 7, 2000
Inventor
Eiji Takahashi
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.