dwpt.2d(waveslim)
dwpt.2d()所属R语言包:waveslim
(Inverse) Discrete Wavelet Packet Transforms in Two Dimensions
(反)离散小波包变换的两个维度
译者:生物统计家园网 机器人LoveR
描述----------Description----------
All possible filtering combinations (low- and high-pass) are performed to decompose a matrix or image. The resulting coefficients are associated with a quad-tree structure corresponding to a partitioning of the two-dimensional frequency plane.
所有可能的过滤组合(低通和高通)进行分解的矩阵或图像。最终的系数被用四叉树结构对应于两维频率平面中的分区相关联。
用法----------Usage----------
idwpt.2d(y, y.basis)
参数----------Arguments----------
参数:x
a matrix or image containing the data be to decomposed. This ojbect must be dyadic (power of 2) in length in each dimension.
图像包含的数据是一个矩阵或分解。此的OBJECT必须是二进(2的幂)的长度,在每一维中。
参数:wf
Name of the wavelet filter to use in the decomposition. By default this is set to "la8", the Daubechies orthonormal compactly supported wavelet of length L=8 (Daubechies, 1992), least asymmetric family.
的小波滤波器的名称使用在分解。默认情况下,此设置为"la8"的Daubechies正交的紧支撑小波的长度L=8(Daubechies小,1992年),至少不对称的家庭。
参数:J
Specifies the depth of the decomposition. This must be a number less than or equal to \log(\mbox{length}(x),2).
指定的深度的分解。这必须是一个小于或等于\log(\mbox{length}(x),2)。
参数:boundary
Character string specifying the boundary condition. If boundary=="periodic" the default, then the vector you decompose is assumed to be periodic on its defined interval,<br> if boundary=="reflection", the vector beyond its boundaries is assumed to be a symmetric reflection of itself.
字符串指定的边界条件。如果boundary=="periodic"默认值,则假定矢量分解其定义的时间间隔上是周期性的,<br>请如果boundary=="reflection",超出其边界的矢量假定是一个对称反射本身。
参数:y
dwpt.2d object (list-based structure of matrices)
dwpt.2d对象(基于列表的结构矩阵)
参数:y.basis
Boolean vector, the same length as y, where TRUE means the basis tensor should be used in the reconstruction.
布尔向量,相同的长度y,其中TRUE装置应使用的基础上张量的重建。
Details
详细信息----------Details----------
The code implements the two-dimensional DWPT using the pyramid algorithm of Mallat (1989).
的代码实现二维DWPT的,采用的Mallat金字塔算法(1989)。
值----------Value----------
Basically, a list with the following components
基本上,与以下组件的列表
参数:w?.?-w?.?
Wavelet coefficient matrices (images). The first index is associated with the scale of the decomposition while the second is associated with the frequency partition within that level. The left and right strings, separated by the dash "-", correspond to the first (x) and second (y) dimensions.
小波系数矩阵(图像)。的第一个索引与规模的分解,而第二个是与该水平内的频率分区。左侧和右侧的字符串,分离由破折号 - ,对应于第一个(x)和第二(y)尺寸。
参数:wavelet
Name of the wavelet filter used.
小波滤波器的名称。
参数:boundary
How the boundaries were handled.
的界限如何处理。
(作者)----------Author(s)----------
B. Whitcher
参考文献----------References----------
A theory for multiresolution signal decomposition: the wavelet representation, IEEE Transactions on Pattern Analysis and Machine Intelligence, 11, No. 7, 674-693.
Adapted Wavelet Analysis from Theory to Software, A K Peters.
参见----------See Also----------
dwt.2d, modwt.2d, wave.filter.
dwt.2d,modwt.2d,wave.filter。
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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