density distribution function

The use of moments for image analysis is straightforward if we consider a binary or gray level image segment as a two-dimensional density distribution function.

若把二值图或灰度图看作是二维密度分布函数，就可把矩技术应用于图像分析中。

This paper analyzes the probability density distribution of the non-soluble deposit density, and hence deduces a combined probability density distribution function.

笔者分析了灰密的概率密度分布，并推导出盐密与灰密的联合概率密度函数。

Figure 1 shows a typical normal probability density function, so called because most observations fall into this sort of distribution.

图1显示了一个典型的正态概率分布函数，这样命名是因为绝大多数值都属于这个分布范围内。