Left part of a uniqueness constraint.

唯一性约束的左侧部分。

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Delete a unique constraint when you want to remove the requirement for uniqueness for values entered in the column or combination of columns included in the constraint expression.

当希望移除对在约束表达式所包含的列或列组合中输入的值的唯一性要求时，可删除唯一约束。

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According to the binary nature of image, a new maximum entropy restoration method with binary constraint is proposed the properties of existence and uniqueness of solution are discussed.

本文主要用最大熵方法对线性退化二值图象的复原进行了研究。

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