Method of, and apparatus for, colouring a black and white video signal
CA 1258118 A · Owner: Vidcolor Image Incorporated · Inventors: Markle, Wilson; Mitchell, Christopher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Wilson Markle, Christopher Mitchell ABSTRACT OF THE DISCLOSURE, A method of colouring a black and white video signal is provided. At least one area of a frame is defined with reference to luminance values in that frame and, luminance levels are assigned to that area. A colour is then assigned to that area, and the area is coloured with it. In a subsequent frame luminance levels are used to determine which part of the preceeding frame has been carried over into the subsequent frame and which portions of the subsequent frame adjacent that part have the same luminance values. That part and those portions are then coloured with the respective assigned colour.
Read the whole patent
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 August 1, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 1, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.