摘要： 为了更有效地实现超分辨率插值，基于传统Walsh滤波模板的设计思想，将Walsh变换与全相位数字滤波相结合，通过将权值修正为按照子滤波器与中心点的距离，提出一种改进的沃尔什插值算法。仿真实验表明，该算法计算简单，抗噪能力强，与传统插值方法和恒定权值全相位Walsh滤波器方法相比，具有更好的插值效果。

关键词: 图像插值, 沃尔什变换, 全相位数字滤波器

Abstract: In order to interpolate images more efficiently, an improved weight-alterable all-phase Walsh filter is proposed. It is combined with the traditional Walsh transform and the all-phase digital filter. The weight factors of the filter are adjusted according to the distance between sub-filter and central point. Simulation shows that except for the facility in computer and the robust to noise, the interpolation effect of the proposed algorithm is better than the classic interpolation and the constant weight all-phase Walsh filter.

Key words: image interpolation, Walsh transform, all phase digital filter

中图分类号: 

• TN911.73