Obviously, the dynamic threshold is to use quasi-peak level that, while the signal to noise ratio is expressed with the quasi-average levels, and the difference is obvious in.

显见，动态阈是用准峰值电平表示，而信噪比则是用准平均值电平表示的，两者的区别是显而易见的了。

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Compared with the traditional de-nosing methods by threshold value and translation invariance, the algorithm increases the signal to noise ratio.

与传统的阈值去噪法和基于平移不变量的去噪算法相比，该算法提高了信噪比。

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The variable relationship between the threshold of the extrapolation and its correspondent Peak of the Signal-to-Noise Ratio (PSNR) in the Wavelet Bi-linear Interpolation Algorithm is deeply analyzed.

分析了小波双线性插值中高频外推阈值门限与重建图像峰值信噪比的变化关系，提出了峰值信噪比最大小波双线性插值迭代算法。

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