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1·Objective to employ an improved Exact Histogram Specification for contrast enhancement of medical ultrasonic images.

目的探求一种改进的精确直方图规格化方法，提高医学超声图像的对比度。

2·In view of the shortcoming of direct histogram equalization and big work of mapping law's calculate in histogram specification, proposed one kind of improvement stipulation algorithm.

在对比指纹图像的灰度直方图增强的技术的基础上，针对均衡化算法的不足和现有直方图规定化算法中映射规则计算量大的情形，提出一种改进的规定化算法。

3·The aim of specification is to transform the histogram of an original image to a specified histogram capable of highlighting certain gray level ranges in the image.

规定化的目的是将原图像的直方图转变为规定的直方图，以便突出一定灰度范围内的图像。