实验结果表明,优化后QM f组的重建误差控制在2%以内,表明该方法的有效性。
The experimental result indicated that the reconstruction error of QMF Banks after optimization is controlled in 2%, indicates this method the validity.
基于一定的解码状态,声码器通过最小均方误差(MMSE)估计的方法估计最优参数,充分降低信道误码对重建语音质量的影响。
The minimum mean square error (MMSE) is computed for each decoding state to estimate optimal parameters and to reduce the influence of the bit error.
在研究平均二次误差与曲面曲率关系的基础上,提出了变分辨率的曲面重建算法。
Based on study of relationship between the average quadric error and the surface curvature, a variable resolution surface reconstruction algorithm was proposed.
编写了重建的船体分段面与理想模型之间轮廓度误差评价的计算机程序模块。
Program a software to make an error margin of outline evaluation between the reconstruction of ship body and ideal model.
为了减小误差在不同扫描行之间的传播,利用透射数据对重建结果进行校正。
For reducing the error propagations among scanning lines, the transmission data are used for rectifying the scattering reconstruction.
重建CT图像的前后方向的几何误差是随着扫描层厚增加而增加,主要是由于CT扫描的部分容积效应影响。
The geometric error of axial image reconstruction increases with the increase of CT scan slice thickness, due to CT partial volume effect.
误差来自于重建和模拟两个方面。
The errors may come from both the simulation and the reconstruction.
通过计算机模拟,考查了数据误差和总观察角大小对重建精度的影响。
Using computer simulation method, the influences of the imput data errors and the sizes of the total viewing angles on the reconstruction precision of these methods have been investigated.
模拟实验和真实实验数据结果表明,该射影重建方法具有鲁棒性好、收敛性好以及重投影误差小等优点。
The experiments with both simulate and real data show that the method is efficient, robust and has good property of convergence and small re-projection errors.
本文简要介绍了地震CT技术的方法原理及实现图像重建的几种数学方法,指出了必要的误差校正处理。
Principle of seismic ct technique and several mathematic methods for realizing image reconstruction are briefly introduced herein. Necessary errors corrections are pointed out.
同时,讨论了重建过程中的误差放大现象,给出了解决方案。
Meanwhile, the error magnification phenomena have been discussed and the corresponding resolvent has been proposed as well.
基于摄像机透视成像的针孔模型,分析了立体视觉中摄像机标定和三维重建过程的主要误差来源。
Various error sources of binocular stereo system are analyzed based on pinhole camera model for estimation of the depth error.
线性模型摄像机标定中,由于不考虑非线性畸变,使投影矩阵存在着标定误差,并影响三维重建的精度。
For not considering the non-linear deformation in linear model camera calibration, projection matrix (PM) con-tains calibration error that affects the precision of3D reconstruction.
对针尖几何形状导致的测量误差进行了分析研究,阐述了几种表面重建方法,给出了相应的计算公式。
The surface reconstruction methods have been expatiated and the calculation formulas have been given. 4. The calibration and compensation of positioning errors have been fully analyzed and studied.
在计算机视觉的应用领域中,为了提高图像量测和3维重建的精度,必须对相机的畸变误差进行修正。
In the application fields of computer vision, camera nonlinear distortion should be rectified in order to enhance the accuracy of the image measurement and 3d reconstruction.
目前的孢粉学方法将表土花粉鉴定到属的水平都十分困难,因此造成依据花粉图谱进行植被重建的时候出现无法矫正的误差。
We developed a new approach to identification of Chenopodiaceous pollens in surface soils to the species level while current palynological methods have less ability to do so even at a genus level.
为了避免迭代式重建策略所存在的累积误差效应,提出了一种线性回溯射影结构恢复策略。
To avoid the effect of cumulate error in conventional iterative reconstruction algorithms, a linear rewound method is put forward.
为了减小配准误差对盲超分辨率重建的影响,提出了一种影像配准和盲超分辨率重建联合处理的模型与方法。
In this paper, a new joint Maximum a Posterior (MAP) formulation was proposed to integrate image registration into blind image Super-Resolution (SR) reconstruction to reduce image registration errors.
与实际树高相比,重建树高中最大误差是4.4%,最小误差为0.7%,在此基础上计算的材积最大、最小误差分别是4.7%和2.1%。
Compared the evaluated height with the true tree height, the errors were within 0.7% to 4.4%, and consequently the errors of volume between 2.1% and 4.7%.
提出用重建的图像的质量来估价运动参数误差,并给出了误差面积和轮廓转折率误差二个函数。
A method of estimation of motion parameter error based on the quality of reconstructed image is suggested. That area error and contour transition turn error is used to be quality criteria.
由于目前常用的编码器普遍采用“预测-残差”方式进行编码,因此一旦传输发生错误,不仅会影响当前帧的重建,更会造成空间及时间上的误差蔓延。
The corrupted parts of the bit-streams may not only affect the reconstruction effect of the current frames, but also cause the error propagation problems both spatially and temporally.
采用辐射图象处理进行二维炉膛温度分布重建是一个典型的逆问题。由一个数字代摄像装置(CCD)镜头获取的信息重建温度场会使重建结果对误差过于敏感。
Reconstruction of temperature distribution through radiant image processing in 2 D furnaces is a typical inverse problem, and it is very sensitive to measurement errors by only one CCD camera.
根据视觉导航应用的特点,提出了由视差图重建三维场景算法的误差分析及误差补偿算法。
From the specialties of application of vision-based navigation, we propose an algorithm for error analysis and compensate of reconstructing 3d scene from the disparity map.
传统的逐点重建法算法简单,但实验装置复杂,且存在对焦误差。
The traditional point-by-point imaging modality is very simple, however, it needs complex experimental setup and there exist positioning error.
传统的逐点重建法算法简单,但实验装置复杂,且存在对焦误差。
The traditional point-by-point imaging modality is very simple, however, it needs complex experimental setup and there exist positioning error.
应用推荐