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Expired Canadian patentCanada

Apparatus and method for transforming a digitized signal of an image

CA 1333636 C · Owner: Jaffray, Ian · Inventors: Bronskill, John F.; Jaffray, Ian

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Abstract From the Canadian patent

The apparatus and method employ a variety of units including Laplacian filters, rank value filters edge, detectors, gain units and summation units to transform an, input digitized signal of an image the transformation being, carried out for each pixel independently. The various elements are combined to produce a variety of desired visual effects, e.g. a brush stroke effect, edge enhancement or the appearance of a reflective chrome surface. Further an, apparatus is provided in which a conditioning unit generates a conditioning function, which enables different parts of an image to be combined in accordance with different methods. Thus a foreground of an image could have the edge content …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted December 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 20, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 22, 1989
GrantedDecember 20, 1994
Term endedDecember 20, 2011
Patent numberCA 1333636 C
Classification (IPC)H04N1/40

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedSep 22, 1989Patent grantedDec 20, 1994Term endedDec 20, 2011

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.