objective image fidelity 客观保真度
The flexibility and superior image fidelity of volume rendering make it a very useful technique in an increasing number of applications.
容积再现技术的灵活性和较高的图像精确性使其成为非常有用的技术，应用范围在不断增加。
As a statistical parameter, PSNR is commonly used in objective way about image fidelity; but sometimes it is not consistent with the subjective way.
主观评价在具体应用时难以使用，常用客观评价方法PSNR是代表图像保真度的统计指标，但有时和主观评价不一致。
The multiresolution structure of wavelet is used to construct the image frequency components., which has better image fidelity preservation and robustness than spatial domain based techniques.
本算法利用小波变换的多分辨率特性来进行图象的小波域分解，这样可以获得更好的图象保真度并且比在空域中的水印嵌入算法更稳健。
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