Image collating method and apparatus

Details Image collating method and apparatus Image collating method and apparatus

1995-01-30

1997-03-18

Britton, Howard W.

Television

Image signal processing circuitry specific to television

Motion vector generation

348402, 348407, 348413, 348416, H04N 734

Patent

active

056127510

ABSTRACT:
To reduce the number of calculations and prevent an error from being detected due to a phase deviation when detecting a motion vector corresponding to the block matching method. A representative pixel value x of a base block composed of (3.times.3) pixels is detected by a representative value extracting circuit 37. A maximum value and a minimum value of a verification block that has the same size as the base block are detected by a MAX/MIN detecting circuit 38. A comparing circuit 39 compares and determines whether or not the representative pixel value x is in the range from the MAX to the MIN. An evaluated value calculating circuit 40 calculates an evaluated value .DELTA. corresponding to the compared result. When x is included in the range from the MAX to the MIN, .DELTA. is 0. An evaluated value is calculated in the vicinity of the position corresponding to the representative pixel of the reference frame. Corresponding to the evaluated value, a motion vector is detected.

REFERENCES:
patent: 5157743 (1992-10-01), Meada
patent: 5278915 (1994-01-01), Chupeau
patent: 5530789 (1996-06-01), Miyazaki

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