Method for determining the displacement of moving objects in ima

Details Method for determining the displacement of moving objects in ima Method for determining the displacement of moving objects in ima

1985-03-05

1986-12-16

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 358105, 358166, 375 27, H04N 7137

Patent

active

046301143

ABSTRACT:
In a method and apparatus for determining, in a system having a transmitting end and a receiving end, displacements of image features occurring between successively transmitted image sequences, by the operations of: determining, at the receiving end, peak values of pixel correlation between successively transmitted image sequences; deriving representations of estimated displacement values from the peak values of pixel correlation; and producing representations of optimized displacement values by a recursion operation which includes recursively deriving a correction value and adding the correction value to an existing estimated displacement value to form a new estimated value, the correction value is derived by performing a mathematical division operation in which the dividend is a selected function of pixel values in successive image sequences and the divisor is proportional to the average of a first value resulting from crosscorrelation of successively transmitted image sequences and a second value resulting from autocorrelation of the currently received image sequence.

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patent: 4383272 (1983-05-01), Netravali et al.
patent: 4437161 (1984-03-01), Anderson
Bergmann, "Analysis of Different Estimation Algorithms for Digital Television Signals", NATO ASI Series, vol. F2, Image Sequence Processing and Dynamic Scene Analysis, T. S. Huang, Springer Verlag, 1983, pp. 215-234.
Schalkoff, "IEEE Trans. on Pattern Analysis and Machine Intelligence", vol. 4, No. 1, Jan. 1982, pp. 2-10.
Bergmann, "Displacement Estimation Based on the Correlation of Image Segments", International Conference on Elec. Image Processing, Jul. 1982, Univ. of York, Great Britain.
Cafforio et al, "IEEE Transaction Information Theory", vol. IT-22, No. 5, Sep. 1976, pp. 573-579.

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