| 摘要 |
A process modification of the content of a sequence of images which can be represented as a matrix of pixels. For that purpose a non-deformable target zone to be replaced in the scene is identified and is characterized, both in position and in dimensions, by reference to marks located close to each other and connected to the target zone in each image. The position with respect to the marks to be assigned to a model which can be superimposed on the target zone, stored in digital form, is determined. For each particular image, the geometrical transformation to be carried out on the model so that it corresponds to variations in the appearance of the target zone in all the successive images in the same shot is determined automatically using a correlation calculation based on the marks. Data suitable for enabling replacement of each current representation of the target are derived from the transformation and output. Apparatus for carrying out the method is also described.
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