光图像

First, we extract the boundaries between two different materials by weighting with gray-level gradient,and only voxels on these boundaries participate in the generation of each image, so it drastically reduces the rendering time. Second. We think the voxels on boundaries as the mixture of different materials,so in every voxel there is a surface. We use the oriented cube-interpolation technique to get the intersection point of viewing orientation and the surface in the voxel, then compute the surface normal of the intersection point. We use the normal to shade the voxel in order to improve the image quality.

首先，采用灰度梯度加权提取出三维数据场中不同物质间的边界，根据显示的需要只对这些边界上的体元赋予相应的阻光度并进行光亮度合成计算，因而可大大减少计算量，提高显示的速度；将边界上的体元作为不同物质的混合体，采用与方向有关的三线性插值来计算视线方向与体素内等值面的交点，根据交点的法向量进行光照效应计算以提高显示图像的质量；最后用投影成像法显示最终的图像。

In image dissectors and vidicon cameras the image is focused directly on the surface of a photosensitive tube whose response is proportional to the incident light pattern.

在图像解析器和摄像机中，图像直接被聚焦在感光晶体管上，感光管的反映是与入射光模式成比列的。

The size of tested field was measured using comparison between the tested field image caught through CCD and the plotting paper image when plotting paper was placed in the tested field position with no plasma jet; the emission intensity distribution of tested field was obtained using stepping motor taking fiber probe to scan tested field, and the spectrum analysis instrument was used to show the spectrum intensity information.

通过CCD获得的待测场图像与没有射流射出时在待测场处放置的坐标纸图像进行比对，测量了实际待测场的大小；利用步进电机带动光纤探针对待测场进行扫描，通过光谱仪获得了待测场的光强分布。

The key to apply CCD to implement mammography is to improve the coupled efficiency of light from scintillation screen to CCD, and it is necessary that the image system has a large relative aperture and adopts close imaging, which makes the CCD image seriously distorted.

为提高由闪烁屏到CCD的光耦合效率，减小大相对孔径和近距离成像造成CCD图像严重失真，提出一种有效补偿图像失真的预处理方法。

By refitting the photographic optical circuit of traditional slit lamp and replacing the original analog camera with digital camera, higher resolution digital images can be obtained in this system.

介绍基于裂隙灯的外眼图像采集与处理系统，系统通过改造传统裂隙灯上的普通相机摄像光路，用数码相机取代传统光学相机，以获得高清晰度数码图像。

By refitting the photographic optical circuit of traditional slit lamp and replacing the original analog camerawith digital camera, higher resolution digital images can be obtained in this system.

介绍基于裂隙灯的外眼图像采集与处理系统，系统通过改造传统裂隙灯上的普通相机摄像光路，用数码相机取代传统光学相机，以获得高清晰度数码图像。

This paper presents a new methods that enhance the image of hand vein based on contrast limited local histogram equalization and top-hat transform to overcome the influence of photoelectric and thickness of the back of hand skin.

为了克服光强，手背厚度对手背静脉图像的影响，提出一种新的手背静脉图像增强方法，对比度受限的局部直方图均衡和top-hat变换相结合的方法。

Very simply put, it works in this way: through a sophisticated system of electronics, television provides the capability of converting an image

简单说来，电视是以这种方式工作的，通过一个复杂的电子系统，电视能够将一幅图像(这幅图像被聚焦在一部摄像机内的一块特殊的光导底片上)转换成能经过导线或电缆发送出去的电子脉冲信号。

Very simply put, it works in this way: through a sophisticated system of electronics, television provides the capability of converting an imagefocused on a special

简单说来，电视是以这种方式工作的，通过一个复杂的电子系统，电视能够将一幅图像(这幅图像被聚焦在一部摄像机内的一块特殊的光导底片上)转换成能经过导线或电缆发送出去的电子脉冲信号。

Very simply put, it works in this way: through a sophisticated system of electronics, television provides the capability of converting an image(focused on a special photoconductive platewithin a camera) into electronic impulses, which can be sent through a wire or cable.

简单说来，电视是以这种方式工作的，通过一个复杂的电子系统，电视能够将一幅图像(这幅图像被聚焦在一部摄像机内的一块特殊的光导底片上)转换成能经过导线或电缆发送出去的电子脉冲信号。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。