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Method and device for modifying a zone in successive images

  • US 5,353,392 A
  • Filed: 07/20/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 04/11/1990
  • Status: Expired due to Term
First Claim
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1. Device for modifying the content of images of a sequence of images having a high degree of correlation between successive images, comprising picture forming means delivering each image as of a matrix of pixels, the radiometric values (luminance and possibly chrominance) of each pixel being in digital form, characterized in that it further comprises:

  • means for storing reference marks for locating a target area in the image and representations of the target area at a plurality of scales and for storing representations, at the same scales, of a pattern which can be superimposed on the target area,means for recognizing the reference marks in the current image and deriving therefrom the position and dimensions of the target area, andmeans for automatically determining, for each image, by spatial correlation calculation based on the reference marks, a geometrical transformation to which the pattern should be subjected to correspond to the variations of appearance of the target area, in all successive images of a same shot and for substituting, in the image, the pixels representive of the pattern for the pixels representative of the target area.

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