Method for detecting a movement of a television signal

Details Method for detecting a movement of a television signal Method for detecting a movement of a television signal

1985-10-24

1987-06-30

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358136, H04N 718, H04N 712

Patent

active

046774769

ABSTRACT:
A method for detecting a movement of a television signal corresponding to the movement of a television camera during a panning operation includes dividing a picture plane of the television signal into blocks and obtaining an absolute value of a difference between pixel values from two consecutive frames for each block. The absolute value is integrated and a block matching table of frame difference integration data is derived therefrom. An extremum value of the frame difference integration data is linearly obtained from a maximum gradient of four gradients taken in upper, lower, left and right gradient directions from the respective origin of each block using the block matching table. This extremum value may be compared with frame difference integration data taken in four oblique directions intermediate the gradient directions to verify the extremum value.

REFERENCES:
patent: 3936800 (1976-03-01), Ejiri et al.
patent: 4307420 (1981-12-01), Ninomiya et al.
patent: 4346405 (1982-08-01), Yoda et al.

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