The attenuation of X-ray through the object is non-linear and the gray level of image is non-linear response of object thickness.
射线穿过物体的衰减是非线性的，经过影像系统得到的图像灰度与物体厚度是非线性的关系；
The optimal segmentation scale means in that image level pure object is most and mix object is lest.
度也就是选择影像中纯对象最多而混合对象数目最少的分割尺度。
Based on the idea that human observers could greatly simplify the matching problem at the level of object structure, a structure-driven SAR image automatic registration algorithm was proposed.
基于人工通过地物结构推理匹配关系进行配准的想法，提出了一种基于结构的SAR图像自动配准算法。
It is very difficult to obtain the accurate borderline of object When distilling the borderline of object with less gray level from its intensity image with disturbance.
用强度图像提取景物边界的主要缺点是当景物间灰度差较小以及噪声存在时，很难得到精确的边界。
The Map Settings section of the dialog controls the view level at (and beyond) which the "Background Image" option will be displayed on the right-click menu for an object.
星图设置用于选择在高于哪一个查看等级的时候，“背景图像”选项会才出现在鼠标右键菜单中。
Firstly, texture and shape features are extracted at the pixel level, and spectral features are extracted at the object level based on multi-scale image segmentation maps.
首先在画素级上提取影像的纹理和形状结构特征，在构建的多尺度分割集影像上提取物件的区域光谱特征。
Firstly, texture and shape features are extracted at the pixel level, and spectral features are extracted at the object level based on multi-scale image segmentation maps.
首先在画素级上提取影像的纹理和形状结构特征，在构建的多尺度分割集影像上提取物件的区域光谱特征。
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