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基于图像梯度信息的插值方法

DOI: 10.11834/jig.200507164

Keywords: 图像插值,梯度,权系数

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Abstract:

图像插值是图像处理中的一个基本问题,为了获得更合理的图像插值权函数,从1维函数中插值的有关思想出发,通过梯度信息在图像插值中的应用研究,构造了一种基于图像梯度信息的加权插值方法。该方法利用图像为分片连续的光滑函数的先验信息,通过建立一个与各点梯度值成反比的权函数来完成对图像的插值,同时对涉及的有关参数选择问题进行了讨论,给出了一种合理的参数选取方法。仿真计算表明,该方法对一般图像均具有较好的插值效果,尤其适用于对比度较强,且边缘简单的图像,插值后的图像边缘更清晰。

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