【摘要】 在分形块编码中，值域块与定义块池中的定义域块逐一匹配过程极其费时，为了大大地缩短分形编码的时间，将定义域块和值域块的匹配限制在以值域块的均值和方差作为中心的动态窗口中．动态窗口的长和宽，根据定义域块均值和方差的二维直方图自适应确定．与全局匹配分形块编码相比，大大地缩短了编码时间．更多还原

【Abstract】 In fractal block coding, the one by one matching procedure between the range block and the domain block in a pool of domain blocks is extremely time-consuming. in order to cut down the matching time, adaptive matching is circumscribed in the dynamic window, whose center is the mean and variance of the range block and whose length and width are adaptively determined according to the histogram of the mean and variance of the domain blocks. Compared with the fractal block coding of global matching, the algorithm developed can remarkably speed up the encoding procedure.更多还原