本文实现了利用B样条函数对图象插值放大的快速算法，并在此基础上，进一步提出了彩色图象放大的方案，既先将图象从RGB空间转换到YUV空间，对UV分量插值放大后进行低通滤波处理，最后再将图象转换至RGB空间。实验结果显示了该方法插值效果好并且处理时间短。-In this paper, the realization of the use of B-spline function of image interpolation to enlarge the fast algorithm, and on this basis, and further put forward a color image to enlarge the program, both the first image space conversion from RGB to YUV space, the weight of the UV Interpolation amplified low-pass filter processing, the final image and then convert to RGB space. The results show that the method of interpolation better and shorter processing time.