一种保持图像边缘的插值方法

在图像超分辨率重建中,需要对低分辨率图像进行插值。在对图像提取边缘的基础上,考虑边缘的方向,先对边缘像素插值,然后对其余零填充像素用双三次插值赋值。最后给出了实验结果,并与最近邻插值、双线性插值及传统的双三次插值进行了比较。结果表明该方法较好地保持了图像的边缘信息。

An Edge Preserved Image Interpolation Method

In the process of image super-resolution reconstruction,there is a need for interpolating pixels in the low-resolution image.On the basis of detecting the edge of low-resolution image and in consideration of its direction,the pixels belong to edges in the reconstructing high-resolution image are interpolated at first.Then,other zero-padding pixels are interpolated by using the bi-cubic method.By comparison with the results of nearest-neighborhood interpolation,bi-linear interpolation and the traditional bi-cubic interpolation, the result of this experiment on Lena image shows that the image edges are better persevered.