结果表明：这几种配准测度和重叠面积的线性相关关系特别显著。

The results indicate that the linear correlativity between these registration measures and overlay area is very prominent.

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它先提取了图像中的边缘，然后二值化，最后把背景的面积作为光照不变测度。

The edge maps are extracted first then it is thresholded and the authors take the area of the background as the illumination invariant measure to perform the detection of shots.

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