Therefore, when applying a thresholding algorithm to an image, we generally assume that the background and target in that image occupy different gray level zone.

传统的阈值化算法仅仅使用像素点的灰度级信息，因而要求图像中的目标和背景在灰度级上是可分的。

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The best team will win a prize and represent Gujarat at at Zone Level Science Drama Festival in December.

UNESCO: World Science Day

Yet French public spending accounts for 56 percent of gross domestic product, the highest level in the euro zone, and public debt reached 90 percent of GDP this year.

FORBES: The Glory That Is The French Economy

For today, I am leaving my support and resistance levels basically unchanged with the first level of potential resistance in the zone of 1.3100 to 1.3110 with initial support somewhere near 1.2840 to 1.2850.

FORBES: Euro Finds Pivot Point Against Dollar