density resolution meaning in Chinese
密度分辨力
密度分辩力
密度浓度分辨能力
Examples
- Ict not only has very high - spatial resolution but also has very high - density resolution
它不仅有很高的空间分辨率，而且有很高的密度分辨率。 - The reconstruction speed of fbp is fast . the image reconstructed by fbp is of high spatial resolution , but with heavy artifacts , while the image reconstructed by art is of high - density resolution and is of sligh artifacts
变换方法以卷积反投影( fbp ）方法最为常用，该算法重建速度快，成像质量较好，但是其要求完全的、等间距的采样数据，通常重建图像伪影较重。 - How improving the capability of ict has become more and more an important task , for example , improving spatial resolution and density resolution , reducing scan time , enlarging the size of measure space , improving image quality , etc . moreover the question of the energy spectrum hardening and the photon scattering is one of important bottleneck to restrict the improvement of ict
如何提高工业ct的性能指标，如怎样进一步提高空间分辨率、密度分辨率，减少扫描时间，增大可测工件尺寸，改善图像质量等等成为了ct界面临的重要任务。而其中射线的能谱硬化和散射问题，又是制约工业ct各项性能指标提高的重要瓶颈之一。 - In the terms of interpolation , the image reconstructed from nearest interpolation or linear interpolation has good edge but serious noise ; reconstruction from 4 * 4cubic interpolation or three b - spline or three - order lagrange interpolations has better local character . 2 x 2cubic interpolations which has both better edge and local character is the ideal interpolation , the following is the basic principle during reconstruction : ( 1 ) the more width of interpolation , the more number of summation and the more order of interpolation polynomial , the higher of density resolution ; ( 2 ) the more of interpolation polynomial and width of interpolation , the more of reconstruction time simultaneously , aimed at eliminating the effects of noise contained in projection data , in this paper , author analysis cause and effects of common artifacts . importantly , discusses convolution back - projection reconstruction algorithm with a shift axis of rotation has been derived for correcting images that acquired with a divergence axis of rotation using the fan beam geometry with an angle - equaled detector
在ct图像重建时，选择有限带宽窗有较好的空间分辨率，三角形窗有较好的密度分辨率，选择余弦窗则使得空间分辨率与密度分辨率的折衷；从窗函数的频谱角度来讲，可以用于图像重建的一个良好的卷积窗函数应该具备以下条件： ( ? )小的3db带宽b ，即最小的主瓣宽度； ( ? )最小的旁瓣最大峰值a ； ( ? )最大的旁瓣峰值衰减速度d ；就内插函数而言，临近点内插与线性内插重建图像噪声大，但有较好的边缘与细节； 4 4三次内插、三次b -样条与四次拉格朗日多项式内插图像平滑，局部特性较好。 - Generally , the size of the flaw is distinguished by x - ray radiographic system , described by density resolution and space resolution , but it is proved experimentally that the space resolution is not always high while the density resolution is high , and the density resolution is not always high while the space resolution is high
通常x ?射线成像系统可分辨疵病的大小，常用密度分辨率和空间分辨率来描述，但试验证明，当系统的密度分辨率高时，系统空间分辨率不一定高，而空间分辨率高时，系统的密度分辨率也不一定高。