HIGH-RESOLUTION IMAGE INTERPOLATION USING LAGRANGE-TYPE VARIABLE FRACTIONAL-DELAY FILTER

HIGH-RESOLUTION IMAGE INTERPOLATION USING LAGRANGE-TYPE VARIABLE FRACTIONAL-DELAY FILTER
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发表时间:
2006-07
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通讯作者:
T. Deng
T. Deng
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其他
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作者:
T. Deng

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我们从理论上证明了用于计算从 N 阶插值多项式导出的一维(1-D)可变分数延迟(VFD)有限脉冲响应(FIR)数字滤波器系数的刘伟闭式公式。在本文中,我们将一维 VFD 滤波器设计扩展到二维(2-D)情况,并表明使用 VFD 滤波进行图像插值可以获得比零阶插值、双线性插值和六项多项式插值等传统插值技术更高分辨率的图像。
We have theoretically proved the Liu-Wei’s closedform formula for computing the coefficients of onedimensional (1-D) variable fractional-delay (VFD) finiteimpulse-response (FIR) digital filter derived from N -th order interpolating polynomial. In this paper, we extend the 1-D VFD filter design to the two-dimensional (2-D) case and show that the image interpolation using VFD filtering can achieve higher resolution image than the conventional interpolation techniques such as zero-order interpolation, bilinear interpolation, and 6-term polynomial interpolation.