Starting from the definition for a set of ordered elements, the area histogram has been extended to analysis gray -level image through the notions of image thresholding decomposition and level sets.
从为有序元素集定义面积直方图出发，通过图像的阀值分解及层集等概念，面积直方图被扩展到了灰度图像。
Methods Ultrasonic images of fatty and normal liver were identified by adopting texture analysis with statistical features and getting features parameter from gray histogram.
方法采用纹理分析法，从灰度直方图中提取特征参数，对脂肪肝和正常肝脏B超图像进行识别。
Meanwhile, through the privacy key analysis, the histogram analysis, the information entropy, the average value of gray change and the relevant analysis, the security of this algorithm is very high.
同时通过具体的密钥空间分析、直方图分析、信息熵、灰度变化平均值和相关性分析显示，该算法具有很高的安全性能。
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