Thomson Licensing

Thomas Licensing

Juan Moronta

Alain Verdier

Gérard Briand

Olivier Le Meur

Jean-Yves Babonneau

Dominique Touchais

The process is characterized in that it performs: Application relates to image interpolation.

Method for detecting saturation of a motion vector field

A method of detecting the reliability of a field of movement vectors of one image in a sequence of video images. The method includes a stage of calculating a stability parameter, Det_Stab(t), for the field. The parameter is based on a comparison (), over two successive images, of the number of occurrences of the majority vectors of the movement-vectors fields of each of these images. A field is defined as stable if the variation in the number of occurrences lies within a predefined bracket. Reliability () is decided on the basis of this stability parameter.

Method and device for detecting reliability of a field of movement vectors

The present invention relates to a device and a process for motion-compensated recursive filtering and a corresponding coding system. The device comprises in particular a blockwise motion estimation module [()], means [()] for determining a recursivity noise level (&#x3c3;), a module () for calculating a prediction error (&#x3b5;), a module [()] for calculating a recursivity coefficient (&#x3b1;) as a function of the recursivity noise level and of the prediction error, means [()] for calculating a motion-compensated image and means of filtering [()] producing a weighting, by the recursivity coefficient, of the current input image and of a filtered and motion-compensated image stored previously. The device also comprises means [()] for determining an immobility noise level (&#x3c3;), and an assembly [()] for processing zones constituting partitions of the blocks employed for the motion estimation, zeroing the motion vectors (d) associated with the zones in which the FDs are below a threshold dependent on the immobility noise level.

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Rennes, France

Juan Moronta