Fast and Effective Interpolation Using Median Filter
Fast and Effective Interpolation Using Median Filter
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DOI：
10.1007/978-3-642-10467-1_119
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发表时间：
2009-12
期刊：
影响因子：
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通讯作者：
Jian Zhang;Siwei Ma;Yongbing Zhang;Debin Zhao
中科院分区：
文献类型：
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作者：
Jian Zhang;Siwei Ma;Yongbing Zhang;Debin Zhao
提出了一种快速有效的中值滤波图像插值算法。插补算法由两步组成。首先，利用非线性迭代过程来插值像素，其方向可以容易地由局部信息确定。其次，根据图像插值可以看作是一个局部图像滤波过程的假设，其余的像素插值所提出的快速中值滤波方法。实验结果表明，在复杂度相近的情况下，该算法在主观质量和客观质量上都优于传统的双线性插值、双三次插值等方法.特别是，该方法是著名的NEDI算法的视觉质量相媲美，然而，具有低得多的计算复杂度。因此，该算法具有计算复杂度低、图像质量好等优点，可用于实时应用。
This paper proposes a fast and effective image interpolation algorithm using median filter. The interpolation algorithm is composed of two steps. First, a non-linear iterative procedure is utilized to interpolate the pixel whose direction can be easily determined by local information. Second, according to the introduced assumption that image interpolation can be regarded as a local image filtering process, the remaining pixels are interpolated by the proposed fast median filter method. Experimental results show that the proposed algorithm provides better performance than traditional techniques (e.g. bilinear interpolation, bicubic interpolation) both in subjective quality and objective quality with similar complexity. In particular, the proposed method is comparable to the well-known NEDI algorithm in visual quality, however, with much lower computational complexity. Therefore, the proposed algorithm can be exploited for real-time applications due to the merits of low computational complexity and good image quality.