local distribution短语³⁵³²³ 基本例句 地区分布 The framework of detecting the image edge based on the sub- pixel multi- fractal measure SPMM is presented. The measure is defined, which gives the sub- pixel local distribution of the image gradient. 本文提出一种基于亚像素多重分形测度的图像边缘检测算法 SPMM，其测度定义为图像亚像素位置的像素灰度梯度的变化。 opticsjournal