依据线阵CCD和面阵CCD细分技术的原理 ,提出了九点四线曲面拟合的面阵CCD细分方法 ,并通过与均值法对比以及在图像放大和图像定位中的实际应用 ,证明了该方法不仅计算简便、图像相关度高、边缘趋势保持较好 ,而且可大大提高图像的分辨率和目标图像的定位精度。 According to the principle of line array CCD and area array CCD subdivision technology, a subdivision method of surface area CCD with nine point and four line surface fitting is proposed. By comparing with mean value method and practical application in image enlargement and image localization, The method not only has the advantages of simple calculation, high image correlation and good edge trend, but also greatly improves the resolution of the image and the positioning accuracy of the target image.