| 摘要 |
PURPOSE: A method for detecting a motion vector of a dynamic image is provided to reduce time consumption required for full search, thereby promptly detecting a motion vector. CONSTITUTION: A reference image which is a previous picture, and a current input image are inputted to a motion estimator(200), and search windows are formed in the reference image for finding a motion vector by macro blocks. An absolute error calculator(210) receives macro block output from the motion estimator for adding up all least absolute error values to output a mean value. The absolute error calculator transmits the mean value to a comparator(220). The comparator stops detecting the motion vector if a condition related to difference values of macro blocks are satisfied. The condition is either a value obtained by subtracting a difference value of the immediately previous macro block from a difference value of a current macro block is smaller than one tenth of the difference value of the current macro block, or the difference value of the current macro block is smaller than an error limit value.
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