查询词典 transform

Conventionally, computing the discrete Fourier transform that is equivalent to sampling of the z transform of the input sequence at equally spaced angles around the unit circle.

在以往，我们计算离算傅立叶转换相当於在z平面的单位圆上均匀的取样，然而，在某些应用上，非均匀的取样会更有效率。

On the basis of the relation, we will prove some useful properties of the discrete Zak transform which lay the foundation for the computation of discrete Gabor transform.

利用连续Zak变换和离散Zak变换的关系，证明了离散Zak变换的一些性质。为进一步研究离散Gabor变换建立了数学基础。

We will strictly derive the discrete Zak transform in more general conditions and establish the relationship between the continuous and the discrete Zak transform.

一、首次给出了一般条件下的离散Zak变换及性质。本文对一般条件下的离散Zak变换进行了严格的推导，并给出了连续Zak变换和离散Zak变换的关系。

Clinically, most MDS patients transform to acute myeloid leukemia, but a few MDS patients transform to aute lymphocytic leukemia, which indicates multipotential stem cells were affected in a few MDS.

临床也发现，多数MDS发展为急性髓系白血病，但也有少数演变为急性淋巴细胞白血病，提示少数MDS病变发生于多能干细胞。

Finally, we give the related image fusion evaluation, the results show that fusion effect based on Bandelet transform is better than wavelet transform.

最后介绍了相关的图像融合评价指标，结果显示，基于Bandelet变换的融合效果优于小波变换。

Next, the Bandelet transform is taken on each directional subband. The proposed multidirectional and multiscale transform with critical sampling can represent the geometrical features such as edges and texture more sparsely, which is of great benefit to image compression.

原始的Contourlet变换有大于1的冗余度而不适于图像压缩的要求，采用传统的张量积小波变换取代其中的拉普拉斯金字塔式变换可获得非冗余的变换形式[8]，Bandelet变换是一种基于图像边缘的变换方法，它能自适应地跟踪图像的几何正则方向。

The wavelet transform suffers from the limitation of poor directional selectivity. To overcome this disadvantage, a novel scheme with joint Contourlet and Bandelet transform is proposed.

针对小波变换方向选择性差的局限，提出了一种基于Contourlet的Bandelet变换。

In this paper,we propose a color image denoising algorithm based on the second generation Bandelet transform to aim at the latest development of the characteristics of the Bandelet transform. The algorithm takes full advantage of the inherent geometry regularity of color images, gets the optimization expression, sets the threshold using noise intensity, and realizes color image denoising using the softthreshold function.

针对目前最新发展的Bandelet变换的特点，本文提出了基于第二代Bandelet变换的彩色图像去噪算法，充分利用彩色图像内在的几何正则性，自适应获得彩色图像的最优表示，通过噪声强度设置阈值，并利用软阈值函数实现彩色图像去噪。

A method based on linear singularity analysis of image is presented. The improved method, called Directional Beamlet Transform is better than traditional Beamlet transform about directional information of image and has the ability of representing linear-singularity of image. According to the analysis of linear singularity, edge detection is transferred to detecting singularity point in the coefficient matrix of DBT.

针对基于图像像素点分析的边缘提取方法存在无法同时满足高抑噪性、连续性、定位性等问题，本文提出了方向Beamle 变换方法，在定义图像线奇异性的理论基础上，利用DBT 对图像进行线奇异性分析，依据Beamlet 变换具有的线段提取能力，将图像边缘检测问题转化为方向Beamlet 变换系数矩阵中奇异点的检测问题，以降低噪声点对边缘检测结果的影响。

By circumrotate transform, the author gets id and iq,called PARK transform.

通过静止坐标变化得到i和 i，称作CLARKE变换（3/2变换）。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。