对比度

Due to the long distance, the target may appear as a dim point and has no feature information like shapes and textures. Furthermore, aero-optic disturbances and air turbulence make the SNR of a single image very low in the real environments. All of above make the miss distance of the missile difficult to estimate in shooting range.

针对目前靶场所面临的测量目标小、距离远、目标与背景对比度小，不具有形状信息的实际问题，提出了一种基于多帧相关技术与波门选通技术相结合的快速目标识别与跟踪方法，特别探讨了多帧相关技术中目标确定的理论判据，并综合考虑目标的尺寸因素和目标的运动特征研究了一种新的波门设定方案。

Like the Sony, the Amazon reader uses a high-contrast, but low-power, screen technology. The Kindle's six-inch screen can display only monochrome text and gray images, and there's lag time and a flash of black every time you turn a page.

和索尼一样，亚马逊的阅读器应用了高对比度、低能耗的显示屏技术，但Kindle的六英寸屏幕只能显示单色文本和灰色图像，而且每次翻页时都有时间延迟和黑色闪屏。

Like the Sony, the Amazon reader uses a high-contrast, but low-power, screen technology. The Kindles six-inch screen can display only monochrome text and gray images, and theres lag time and a flash of black every time you turn a page.

和索尼一样，亚马逊的阅读器应用了高对比度、低能耗的显示屏技术，但Kindle的六英寸屏幕只能显示单色文本和灰色图像，而且每次翻页时都有时间延迟和黑色闪屏。

And a good result can be gotten in low contrast image by combined with morphologic operation.

并且结合形态学处理可对低对比度的目标获取好的分割结果。

The experiment results show that the model does not change the illumination and contrast, has commonality and noise immunity, and corresponds to the characteristics of human vision system.

实验结果表明：该算法对图像亮度和对比度具有不变性，并且具有较好的抗噪性能和通用性，符合人类视觉系统特性。

Gorgeous, impenetrable images contrast sharply with Spacek's nostalgically artless narration, serving as ironic counterpoints, blurring concrete meaning, and stressing that nothing this horrific is simple.

华丽，坚不可摧的图像对比度与斯帕切克的怀旧天真叙事急剧下降，因为具有讽刺意味的反差服务，模糊具体含义，并强调这没有什么可怕的是简单的。

Therefore, when you deal with colorful scanned in black and white will not only match the crime scene embody the white and black object hierarchy of the Zodiac, and outstanding visual contrast of light and shade.

因此，扫描时处理好彩图中的白和黑，不但能逼真表现各种白色和黑色物体的层次质感，且能突出视觉上的明暗对比度。

First,an image is divided into blocks,and every block is decomposed into one-level wavelet to obtain the wavelet contrast.

该方法先将载体图像分成固定大小的小块，对每一小块进行小波一级分解后计算小波对比度。

But there are some special performance requirements in the military application of LCD, for example, the operating ambient temperature range, the contrast controlling, the night-vision compatible and sunlight readable.

但是，军用LCD在性能方面有一些特殊的要求，例如工作温度范围、对比度、夜视兼容和抗阳光等。

The inventive light modulating elements contain a mesogenic modulating medium that exists in an optically isotropic phase when the light modulating elements are in operation and, in addition to having a good contrast, a low dependency on the viewing angle and very short switching times, they are particularly characterized by having relatively low driving voltages with a very low dependency on temperature.

根据本发明的光调制元件包含介晶调制介质，该介晶调制介质在光调制元件的操作期间处于光学各向同性相和，除良好的对比度，低视角依赖性和非常短的响应时间以外，其特别突出之处为相对低的驱动电压与非常低的温度依赖性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐