并通过计算机模拟，确定出该最佳阈值位于联合变换功率谱的平均灰度值附近。
That is, there exists an optimal threshold, which lies in the average gray of the joint transform power spectrum by computer simulation.
像元结构对输入图像的抽样使联合变换功率谱和相关输出是空间周期性重复的。
The present method is achieved with an amplitude gray-scale spatial light modulator (SLM) as the image input device and based on double exposure holographic phase-shifting interferometry.
分析了微分滤波对联合变换功率谱的影响，得到了一种称之为功率谱形式的微分滤波器。
In this paper, the effect of differential filter on joint power spectrum has been analyzed and so-called power spectrum differential filter is introduced.
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