Motion compensating apparatus using gradient pattern matching an

Details Motion compensating apparatus using gradient pattern matching an Motion compensating apparatus using gradient pattern matching an

1998-10-09

2000-09-19

Le, Vu

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

348699, 348416, 348208, H04N 712

Patent

active

061223190

ABSTRACT:
An apparatus and method for detecting a motion vector by converting an input image into gradient pattern information and comparing gradient pattern information in a motion detection area of a current field with representative pattern information of a previous field. A gradient pattern converter converts a gray level of each pixel in a motion detection area in an input image into a gradient bit pattern by comparing differences between the gray level of the pixel and gray levels of its adjacent pixels with an arbitrary threshold value. A motion vector detector forms a search area sequentially in the motion detection area, compares a gradient bit pattern of the search area with a representative bit pattern of a previous image to calculate and accumulate correlation values, and determines a difference of coordinates of a search area which results in a maximum correlation value and coordinates of the representative bit pattern as a motion vector.

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