Method for the representation of video images or scenes, in part

Details Method for the representation of video images or scenes, in part Method for the representation of video images or scenes, in part

1986-06-25

1987-12-01

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, 358105, H04N 718, H04N 712

Patent

active

047108096

ABSTRACT:
The invention relates to a method for the representation of video image sequences or scenes with a relative movement between a pick-up sensor and the viewed scene, such scenes being transmitted at reduced frame rate. By interpolation and/or extrapolation on the basis of two transmitted frames intermediate frames are generated on the receiving end of the transmission line and inserted into the transmitted frame sequence. The positions of image points (pels) which are identical in the two transmitted images are determined from the relationship of the pel positions for at least two identical pels on different vertical and horizontal coordinates in each of the two transmitted frames. Before reconstruction of the intermediate frames the mean brightness values for limited picture areas which represent the environment of at least one of the corresponding pels in two successive transmitted frames are determined. These brightness values are subtracted or divided and the brightness value in the extrapolation zone of the intermediate frames is corrected in accordance with the resulting differences or quotients.

REFERENCES:
patent: 4383272 (1983-05-01), Netravali et al.
patent: 4460923 (1984-07-01), Hirano et al.
patent: 4496972 (1985-01-01), Lippmann et al.
"Advances in Picutre Coding", by H. G. Mussmann et al., Proceedings of the EEE, vol. 73, No. 4, Apr. 1985, pp. 523-548.

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