Method for determining the displacement of image sequences...

Details Method for determining the displacement of image sequences... Method for determining the displacement of image sequences...

H - Electricity

04

N

350/33, 350/81

H04N 7/46 (2006.01)

Patent

CA 1229157

ABSTRACT OF THE DISCLOSURE 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 displace- ment values from the peak values of pixel correlation; and produc- ing 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 displace- ment 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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