Using an incoherent optical correlator and a shift encoding method, the processing of gray sclae image matching based on similitude measurement was realized.

利用非相干光相关操作处理和空间移位编码方法，实现了基于相似性度量的灰阶图像匹配处理。

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First, we calculate the translation between two images by gray projection algorithm, then we use the block-matching algorithm in the divided blocks.

首先利用灰度投影法得到相邻两幅图像的平移量，在此基础上再利用块匹配算法进行分块处理。

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Then the matching support can be calculated according to length distortion, direction distortion, gray distortion, and double faces constraint.

然后，根据影像的长度变形、方向变形、灰度变形及双向一致性条件，计算匹配支持度；

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Bassani's customers are fiercely loyal, striding proudly around the docks after a race in gray Wally polo shirts with matching shorts.

FORBES: Wallypalooza

In "The Tomb, " a prison-escape thriller, Mr. Schwarzenegger sports gray-flecked hair and a matching goatee.

WSJ: Arnold Schwarzenegger: A Career Not Yet Terminated

Eerier yet is Robert Moskowitz's "Skyscraper, " from 1998, which presciently depicts the matching behemoths as two solid-black fields of color dark shadows set against a bleakly gray sky.

WSJ: Skyline Views: 'Skyscraper' at Chicago's Museum of Contemporary Art