本文提出一种改进的亚像素算法，通过将目标区域划分成内部像素区域和边缘像素区域两部分，并对内部像素灰度进行均值化，从而有效抑制内部像素噪声。-This paper presents an improved sub-pixel algorithm, the target region is divided into pixels within the pixel region and edge regions of two parts, and with average gray level of