相位相关作为一种图像匹配技术对噪声有较高的容忍程度，检测结果与照度无关，受几何失真影响小。但该方法对旋转变化非常敏感。

Phase correlation algorithm as a kind of image matching method has many advantages such as insensitive to noise, unrelated to illumination of target, immune to geometric distortion.

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用该方法对实验环境照度下捕捉的图像和红外光源辅助照明的图像进行了分析，并与主动轮廓线方法对比。

The proposed method is applied to the visible-light image and IR-illuminated image in the experimental condition, and contrasted with a method based on active contour.

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结果是目标上的照度、后向散射光和信号光在光电阴极面上的照度增加，目标与背景图像的对比度降低；

The results demonstrate that the irradiance on object, backscattering and signal irradiance on photo-cathode are increased and the image contrast between object and background is decreased.

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