对比度

After intravenous injection of liposomal Gd-DTPA, the contrast of hepatic metastases was better than that before enhanced.

采用标准SE序列的T1WI作为兔肝转移瘤模型增强前扫描序列，组织对比度较好，图像质量好。

The linear darkness transform method is used to increase the contrastiveness of pictures; the improved mid-value filtering algorithm and local average method are adopted to protect the edge as much as possible on the basis of noise elimination.

采用线性灰度变换等方法对图像进行增强，使图像的对比度扩展。采用改进型中值滤波法和多图像平均法，在去除了噪声的基础上尽可能的保护了边缘。

Choose mobiles with high contrast colors and patterns that will be the most interesting for your baby.

选择手机与高对比度的颜色和图案，将是最有趣的为您的宝宝。

This paper makes example of goat,modelings disease diagnostic knowledge base by the use of object-oriented knowledge representation.

实验结果表明，多引擎诊断模型提高了知识库数据资源的利用率，改善了诊断准确度，增加了对比度。

Based on the results of the contrast of star to sky background in daytime, the detectable stellar magnitude limits are computed and analyzed as functions of observing heights, solar zeniths angle, wavebands and stellar spectral types for 3°×3° field of view.

根据恒星和白天大气背景辐射的对比度，计算和分析了3°×3°视场下，可探测星等极限值随观测高度、太阳天顶角、波段和恒星光谱类型的变化情况。

Owing to the high luminous intensity and contrast, the KaVo light is indispensable for all precision work.2300 lux power, 2 x 36 W (measured at a distance of 62 cm from light to worktop), electronic ballast.

由于较高的发光强度和对比度，卡瓦照明灯是所有精密作业中不可或缺的一部分。2300 lux光照度，2 x 36 W（在照明灯到工作台面的距离为62 cm时测量），电子镇流器。

X-ray real time image system was used to detect I style laser weldments nondestructively, and X-ray detection images were obtained.

采用X射线实时成像系统对工字形激光焊件进行检测，得到了含有微小缺陷的低对比度射线检测图像。

Reduction of the X-ray tube voltage instead of increase of the exposure level would improve the DSA system performance.

结论对DSA系统而言，降低X射线机管电压要比增大X射线机输出强度更能有效改善其低对比度血管的检测能力。

By means of equalizing the histogram, the contrast of original thermal image is enhanced; then image region of the disc surface of insulator is intercepted manually; through the envelope of the smoothened histogram of thermal image the segmentation threshold is extracted and the morphological filtering is applied to the threshold- segmented binarized image to obtain insulator disc surface image and background image, and then 10 infrared image features of insulator disc surface image and background image, such as the highest temperature, the lowest temperature, mean temperature, variance of temperature distribution of both kinds of images, as well as maximum temperature rise and mean temperature rise of insulator disc surface relative to background, are extracted; finally, the good and bad features are discriminated by single factor variance analysis, thus the feature selection is implemented.

利用直方图均衡化增强原始热像图对比度，人工截取绝缘子盘面图像区域；通过平滑后的图像直方图包络线提取分割阈值，对阈值分割后的二值图像进行形态学滤波，得到绝缘子盘面图像和背景图像，提取2者的最高温度、最低温度、平均温度、温度分布方差以及盘面相对于背景的最大温升和平均温升共10个红外热像特征；应用单因素方差分析甄别特征优劣，实现特征选择。

On the basis of taking full advantage of multi scale wavelet analysis,the proposed algorithm improves the contrast of the approximations of the wavelet transform through two lifting steps,and shrinkages the coefficients of wavelet transform on the diferent degree and then enhances the coefficients.

在多尺度分析基础上，该算法对小渡分解得到的低频子带图像采用两步提升法进行对比度增强处理，而对小波分解得到的不同方向上的小波系数进行不同程度的去噪并增强。

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