The speed function defined in Level set method can be divided into two classes: function based on the gradient of image and function based on the image gray.
水平集方法的速度函数定义根据所利用的图像信息可以分为两大类：基于图像梯度和基于图像灰度信息。
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。
Thus, we propose that the blend of a full-color image can be viewed as superposition of two complementary gray - level transformation images.
这样，可将图像的合成看作两幅图像互补的灰度变换的叠加。
Image registration methods are commonly classified into two types: the methods based on grey level information and the methods based on feature information.
图像配准方法基本可以分为基于灰度和基于特征这两大类图像配准方法。
A novel image enhancement technique suitable for low light level image, dualistic sub image enhancement based on two dimensional histogram analysis and histogram equalization, is presented.
提出了基于二维直方图分析的二元子图微光图像增强处理算法。
The one-dimensional Boolean evaluation algorithm for two-level CSG model is explored and its application in the shading image processing is implemented.
研究了二层树结构CSG模型一维布尔运算的快速算法，并给出了在图形显示应用中的实例。
The two-level discrete complex image method is used to compute the spatial Green's Function, and thus improves the speed to compute Green's function compared with the direct integral method.
该方法采用二级离散复镜像方法求解空间域的格林函数，与直接数值积分方法相比，提高了计算格林函数的速度。
In this paper a novel method is presented to segment gray level image through maximizing the fuzzy partition entropy of two-dimensional histogram.
该文提出了一种通过最大化二维直方图模糊划分熵分割灰度图像的新算法。
At last, these two images including differences and the gray-level fusion image are sent to r, g, B color channels respectively.
最后，将两幅差异图像和灰度融合图像分别送至r、G、B颜色通道进行显示。
Combining the two essential characteristics of the image, the gradient and the gray level, a threshold segmentation approach using maximum entropy with the gradient boundary control was proposed.
结合梯度和灰度这两种图像的本质特征，提出一种基于边界梯度控制的最大熵阈值分割方法。
Ordinary document image retrieval algorithms can be classed into two classes, character content (OCR) based method and image level feature based method.
提出一种综合利用文档图像的段落特征和局部像素分布相对差特征进行文档图像检索的方法。
This two-level semantic annotation research is of great significance to the semantic-based image retrieval system.
这两个层次的语义标注研究对于动画素材图像语义检索系统的高效运行有着重要意义。
The first level of our system employs the self-organizing feature map (SOFM) to map colors of image on a two dimensional feature map.
第一层结构使用自组织特征映射神经网络（SOFM）将像素映射到二维的平面上。
Two methods of remote sensing image decision-level fusion are studied.
遥感影像融合是遥感图像处理中的研究热点和难点之一。
Two methods of remote sensing image decision-level fusion are studied.
遥感影像融合是遥感图像处理中的研究热点和难点之一。
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