Using this data, the availability and suitability of three predicted models for foreign terrain scattering coefficient are compared and analyzed.
并利用测量数据，比较和分析国外三个地面散射系数预测模型的有效性和适用性。
The availability of the extracted watermark ise-valuated by comparing the normalized correlation coefficient of the extracted watermark with the true one.
最后与嵌入的水印进行相关性检测来检测提取出的水印是否有效。
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