Digital correlation method was used to extract phase information as the phase information of eddy current testing signals could reflect the characteristics of detecting system.

涡流检测信号中的相位信息能反映检测系统的某些特性，讨论用数字相关法提取相位特征信息。

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A measurement system for sine signal phase difference is designed by using DSP and digital correlation method.

设计一个采用DSP技术和数字相关法测量两路正弦信号相位差的检测系统。

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The optical measurement system of digital image correlation method was established, and the full field displacement of the single-edge crack specimen was obtained experimentally.

通过搭建数字图像相关方法光学非接触测量系统，试验表征含单边裂纹芳纶纤维复合材料试验件在拉伸载荷作用下的全场位移。

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As the missile nears its target, the Digital Scene Matching Area Correlation system takes over.

BBC: Tomahawk cruise missile

Holography and optical correlation are both inherently analogue processes that can degrade the clean 1s and 0s required in a digital system.

ECONOMIST: Optical recognition