grey-levelBNC²³⁶²¹³⁺¹ 基本例句 光灰度值子灰度级 This paper presents a new grey-level mapping law for direct histogram specification, interval mapping law IML. This law is based on the classical single mapping law SML and group mapping law GML. 在经典的单映射规则SML和组映射规则 GML的基础上，提出一种新的映射规则——区间映射规则 IML，并提出基于 IML的数字图像直方图规定化方法。 cnki