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Key signal generating apparatus and picture synthesis apparatus, and key signal generating method and picture synthesis method

  • US 6,128,046 A
  • Filed: 01/06/1997
  • Issued: 10/03/2000
  • Est. Priority Date: 05/12/1995
  • Status: Expired due to Fees
First Claim
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1. A key signal generating apparatus adapted for generating a key signal from picture,key signal generating means for generating the key signal on the basis of the change of the pixel value outputted from the change detecting means;

  • wherein the key signal generating means is adapted so that in the case where alias takes place in the picture, it generates the key signal for allowing the influence of that alias to be reduced.

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